Elsevier 2023 SDG mapping
Tips
How to read a Scopus query
The Scopus queries presented in this view correspond to what is known on scopus.com as advanced search queries. Advanced searches allow a query creator to create complex and robust queries using field codes, Boolean operators, or proximity operators. We detail each of these elements below.
Field codes
A typical publication's Scopus record contains a myriad of information about it. To make this information easily usable, this information is structured and parsed apart in different fields, each containing a given type of information. For example, the title field contains a publication's title, and the publication year field informs us about when a given publication was first made public.
Field codes are there to indicate which field(s) we would like to source information from when conducting a given search. To avoid searches becoming overly long, they are usually shortened words such as ABS, which stands for "Abstract". The most commonly-used field codes used by our query-building team are:
- TITLE-ABS-KEY
Searches through the Title, Abstract, and all Keywords - TITLE-ABS
Searches only through the Title and Abstract - AUTHKEY
Searches only through the Author-defined keywords - SRCTITLE
Searches only through the journal or conference proceedings' titles
To conduct a search in a given field, the syntax is always field-code(search-term).
The field codes used can potentially have a deep impact on a search. For example, searching for "Canada" in field AFFILCOUNTRY would return publications where at least one author was affiliated with a Canadian institution, while the same search conducted in field TITLE-ABS-KEY would return articles that concern Canada.
Boolean operators
In most cases, conducting a Scopus search using a single field code or a single term is not sufficient to obtain a robust set of results. To remedy this, Scopus searches make use of boolean operators to allow for the combination of different terms or query parts. The allowed operators are
- OR
At least one of the terms must appear in the specified field, or at least one of the searches must match - AND
Both of the terms must appear in the specified field, or both searches must match - AND NOT
Only the first term must appear in the specified field, or only the first search must match
Boolean operators are applied in the order they were listed above. Therefore, KEY(mouse AND NOT cat OR dog) is interpreted as KEY((mouse) AND NOT (cat OR dog)).
Proximity operators
In some instances, a certain word is deemed relevant to a topic only if it is close to another word in the text, or certain phrasings might space out two related words defining a topic, which we could want to be tolerant to. For example, the sentence "publishing scholarly journals" is relevant to the topic of "scholarly publishing", but searching for "scholarly publishing" alone would not capture an article that used this expression.
Using proximity searches enable building queries that are tolerant to such things. Two proximity search operators are available in Scopus:
- W/n
Both terms must be within n words of each other, but not in any particular order - PRE/n
Both terms must be within n words of each other, in the order they are listed in
For example, the search TITLE-ABS-KEY("journal" W/2 "publishing") would capture the sentence from the example above, but TITLE-ABS-KEY("journal" PRE/2 "publishing") would not, since the words are not in the same order.
Introduction
The United Nations Sustainable Development Goals (SDGs) challenge the global community to build a world where no one is left behind.
Since 2018, Elsevier has generated SDG search queries to help researchers and institutions track and demonstrate progress toward the SDG targets. In the past 3 years, these queries, along with the university’s own data and evidence supporting progress and contributions to the particular SDG outside of research-based metrics, are used for the THE Impact Rankings.
Method
For 2025, the SDGs use the exact same search query and ML algorithm as the Elsevier 2023 SDG mappings, with only minor modifications coming from changes to the search engine handling the SDG queries. Because of this, while the vast majority of publications retain their original mapping, the number of publications in each SDG has slightly changed.
All these changes were implemented to streamline how SDG queries are handled. Users should note that running these in Scopus should be done for reference purposes only, as the Scopus search engine behaves slightly differently than the classifier used to formerly tag SDGs to publications. Full details of the 2023 methodology are available on Digital Commons Data.
SDG 6 – Clean Water and Sanitation
Query
Below is the full search query used for SDG 6 – Clean Water and Sanitation. We’ve broken it down by each query component. Use the + and – buttons to expand or concatenate the different bracket levels.
Subfields of science
In this section, we show how the publication set, captured by the query above, relates to the Science-Metrix classification system.As shown in Figure 1, the publications related to this publication set fall mainly under the subfields of Environmental Sciences (161,706 publications), Environmental Engineering (156,439 publications) and Chemical Engineering (70,071 publications). The total share of each subfield included under the publication set are presented upon hovering your cursor over the bars.
Journals
In this section, we show how the publication set, captured by the query above, relates to scholarly journals. Journals are sorted in terms of their total output in the field. The horizontal bars are proportional to the number of publications contributed by the journal to the current publication set. To see the proportion of the total publications in the journal contributing to this publication set or their relevance score, you can hover your cursor over the bars.The articles on this topic are published most frequently in the following journals: Science of the Total Environment (17,495 publications), Desalination and Water Treatment (13,200 publications) and Water Research (13,053 publications).
Keywords
Elsevier’s Scopus database of scientific literature, was used for the table below. The document types included in the data sets are journal articles, reviews, short surveys and conference papers, covering the period 1996–2022. We refer to these documents collectively as “publications” or “papers”.In order to help better illustrate the content of this set of publications, indicators associated with the keywords most specific to this set (according to a TF-IDF score) are presented below.
Term | Papers with this term in the publication set | Papers with this term in all of Scopus | Relevance (tf-idf) | Percentage of Scopus |
---|---|---|---|---|
the water framework directive | 2437 | 2557 | 19.319530 | 95 |
water framework directive (wfd) | 1699 | 1757 | 19.318945 | 97 |
water governance | 2976 | 3149 | 19.297090 | 95 |
river restoration | 2257 | 2416 | 19.280017 | 93 |
european water framework directive | 1369 | 1420 | 19.273163 | 96 |
wastewater treatment plant (wwtp) | 3274 | 3494 | 19.272011 | 94 |
sequencing batch reactor (sbr) | 2537 | 2730 | 19.271222 | 93 |
integrated water resources management | 1748 | 1867 | 19.263451 | 94 |
wastewater treatment plants (wwtps) | 4422 | 4633 | 19.259932 | 95 |
wetland restoration | 1950 | 2112 | 19.249366 | 92 |
wastewater remediation | 1382 | 1461 | 19.241103 | 95 |
sustainable water management | 1612 | 1735 | 19.237713 | 93 |
constructed wetlands (cws) | 1237 | 1291 | 19.237261 | 96 |
irrigation strategies | 1273 | 1335 | 19.236080 | 95 |
waste activated sludge (was) | 1300 | 1368 | 19.235167 | 95 |
contaminated wastewater | 1816 | 1975 | 19.234688 | 92 |
deficit irrigation | 4444 | 4713 | 19.234311 | 94 |
olive mill wastewater | 1608 | 1735 | 19.232780 | 93 |
iwrm | 1197 | 1247 | 19.231570 | 96 |
integrated water resources | 1881 | 2060 | 19.225441 | 91 |
drinking water treatment plant | 1808 | 1978 | 19.223222 | 91 |
oily wastewater | 2341 | 2590 | 19.218330 | 90 |
drinking water distribution | 1966 | 2171 | 19.213913 | 91 |
drinking water distribution system | 1591 | 1736 | 19.210623 | 92 |
eu water framework directive | 1187 | 1252 | 19.207307 | 95 |
dye wastewater | 2991 | 3314 | 19.207236 | 90 |
real wastewater | 2408 | 2683 | 19.205101 | 90 |
wwtp effluent | 1096 | 1143 | 19.203818 | 96 |
surface flow constructed wetland | 1334 | 1434 | 19.203179 | 93 |
irrigation water use efficiency | 1216 | 1292 | 19.200932 | 94 |
sequencing batch reactors | 1805 | 1999 | 19.200443 | 90 |
urban wastewater | 3270 | 3623 | 19.198661 | 90 |
wastewater treatments | 1337 | 1442 | 19.197751 | 93 |
stream restoration | 1361 | 1472 | 19.196734 | 92 |
transboundary water | 1354 | 1468 | 19.191217 | 92 |
conventional wastewater treatment | 1416 | 1546 | 19.188206 | 92 |
textile wastewater | 3588 | 3973 | 19.187638 | 90 |
water treatment technologies | 2110 | 2369 | 19.187379 | 89 |
industrial wastewater. | 2670 | 3014 | 19.178064 | 89 |
non-point source pollution | 3003 | 3382 | 19.175201 | 89 |
groundwater remediation | 2142 | 2422 | 19.174769 | 88 |
water security | 4093 | 4516 | 19.171960 | 91 |
water savings | 1962 | 2220 | 19.168345 | 88 |
water framework directive | 6236 | 6531 | 19.163848 | 95 |
regulated deficit irrigation | 970 | 1012 | 19.162454 | 96 |
drinking water sources | 2426 | 2765 | 19.161948 | 88 |
regulated deficit | 984 | 1031 | 19.160110 | 95 |
waste activated sludge | 2685 | 3059 | 19.160100 | 88 |
total maximum daily load | 1200 | 1303 | 19.158874 | 92 |
rainwater harvesting | 2940 | 3345 | 19.157115 | 88 |
water-saving | 4081 | 4546 | 19.153401 | 90 |
rainwater harvest | 2985 | 3401 | 19.153132 | 88 |
the eu water framework directive | 994 | 1049 | 19.151134 | 95 |
wastewater treatment processes | 2738 | 3136 | 19.148916 | 87 |
wastewater reuse | 2749 | 3156 | 19.144174 | 87 |
wwtps | 6319 | 6669 | 19.143203 | 95 |
solar desalination | 1742 | 1989 | 19.140082 | 88 |
water arsenic | 1125 | 1223 | 19.138710 | 92 |
water productivity | 5003 | 5484 | 19.138048 | 91 |
mill wastewater | 2634 | 3042 | 19.134769 | 87 |
drinking water source | 3680 | 4177 | 19.134669 | 88 |
urban water management | 1267 | 1406 | 19.134136 | 90 |
water-saving irrigation | 1213 | 1338 | 19.133841 | 91 |
sustainable groundwater | 1075 | 1164 | 19.132002 | 92 |
groundwater nitrate | 1271 | 1413 | 19.131668 | 90 |
maximum daily load | 1210 | 1336 | 19.131454 | 91 |
bottled water | 2420 | 2804 | 19.130582 | 86 |
municipal wastewater treatment plants | 1635 | 1869 | 19.129708 | 87 |
activated sludge model | 1138 | 1246 | 19.129462 | 91 |
subsurface flow constructed wetland | 1019 | 1095 | 19.128111 | 93 |
water management strategies | 1370 | 1543 | 19.125397 | 89 |
drinking water distribution systems | 1077 | 1171 | 19.125333 | 92 |
drinking water treatment plants | 1060 | 1150 | 19.124194 | 92 |
tannery wastewater | 1163 | 1282 | 19.123679 | 91 |
municipal wastewater treatment plant | 3600 | 4123 | 19.120414 | 87 |
water management practice | 1722 | 1986 | 19.120226 | 87 |
groundwater vulnerability | 1286 | 1442 | 19.119165 | 89 |
domestic wastewater treatment | 1460 | 1663 | 19.117699 | 88 |
water management practices | 1526 | 1750 | 19.113202 | 87 |
desalination system | 3059 | 3554 | 19.112928 | 86 |
water policy | 3204 | 3715 | 19.111934 | 86 |
management of water resources | 3368 | 3896 | 19.110356 | 86 |
wastewater purification | 1686 | 1955 | 19.107690 | 86 |
transboundary river | 955 | 1026 | 19.106173 | 93 |
groundwater management | 3604 | 4161 | 19.104282 | 87 |
water framework | 6301 | 6786 | 19.102012 | 93 |
dairy wastewater | 1181 | 1322 | 19.100717 | 89 |
untreated wastewater | 1362 | 1555 | 19.099729 | 88 |
industry wastewater | 2304 | 2715 | 19.098597 | 85 |
dyeing wastewater | 1424 | 1635 | 19.098552 | 87 |
pharmaceutical wastewater | 1236 | 1397 | 19.095375 | 88 |
river management | 2363 | 2792 | 19.093554 | 85 |
water allocation | 3904 | 4501 | 19.093244 | 87 |
tmdl | 1291 | 1470 | 19.092671 | 88 |
industrial wastewater treatment | 2463 | 2916 | 19.089265 | 84 |
dye waste | 3185 | 3739 | 19.088383 | 85 |
basin management | 2315 | 2745 | 19.086823 | 84 |
water vulnerability | 1464 | 1698 | 19.085475 | 86 |
wastewater treatment plants (wwtp) | 918 | 990 | 19.085265 | 93 |
wastewater treatment technologies | 1018 | 1121 | 19.085231 | 91 |
epanet | 1240 | 1412 | 19.082937 | 88 |
irrigation scheduling | 3659 | 4272 | 19.079684 | 86 |
sequencing batch reactor | 6308 | 6866 | 19.079500 | 92 |
irrigation water use | 1977 | 2348 | 19.078528 | 84 |
urban wastewater treatment | 1001 | 1104 | 19.076951 | 91 |
conventional activated sludge | 1565 | 1836 | 19.075882 | 85 |
river basin management | 1721 | 2036 | 19.073347 | 85 |
irrigation method | 2534 | 3025 | 19.072728 | 84 |
wastewater effluents | 1837 | 2184 | 19.070959 | 84 |
contaminated waters | 1672 | 1978 | 19.069868 | 85 |
irrigation methods | 1652 | 1956 | 19.066757 | 84 |
horizontal subsurface flow | 881 | 952 | 19.066275 | 93 |
irrigation efficiency | 1409 | 1646 | 19.065323 | 86 |
dyeing waste | 1481 | 1739 | 19.065233 | 85 |
wastewater management | 2554 | 3061 | 19.064871 | 83 |
constructed wetland system | 942 | 1034 | 19.064193 | 91 |
sanitation and hygiene | 1505 | 1772 | 19.063042 | 85 |
wastewater treatment systems | 2826 | 3382 | 19.062215 | 84 |
wine wastewater | 1234 | 1422 | 19.060577 | 87 |
saline wastewater | 1027 | 1149 | 19.060453 | 89 |
stormwater management | 4197 | 4883 | 19.060390 | 86 |
swine wastewater | 1224 | 1410 | 19.059159 | 87 |
hygiene (wash) | 975 | 1081 | 19.058920 | 90 |
water disinfection | 3589 | 4243 | 19.058083 | 85 |
simulated wastewater | 1682 | 2005 | 19.056679 | 84 |
surface flow constructed wetlands | 800 | 850 | 19.055941 | 94 |
irrigation management | 5294 | 5994 | 19.055615 | 88 |
desalination technologies | 968 | 1074 | 19.055215 | 90 |
rainfed agriculture | 1025 | 1150 | 19.054915 | 89 |
water sustainability | 1304 | 1519 | 19.054277 | 86 |
horizontal subsurface | 1016 | 1139 | 19.053443 | 89 |
water quality index (wqi) | 1672 | 1996 | 19.053252 | 84 |
biological wastewater treatment | 2471 | 2986 | 19.050130 | 83 |
arsenic in drinking water | 930 | 1027 | 19.049190 | 91 |
agricultural water management | 959 | 1066 | 19.048750 | 90 |
and hygiene (wash) | 947 | 1050 | 19.048705 | 90 |
water saving | 5263 | 5991 | 19.046353 | 88 |
sanitation service | 1190 | 1376 | 19.045320 | 86 |
drip irrigation system | 1786 | 2150 | 19.045244 | 83 |
constructed wetlands | 6976 | 7589 | 19.042662 | 92 |
seawater desalination | 4509 | 5250 | 19.042309 | 86 |
contaminated groundwater | 4485 | 5226 | 19.042083 | 86 |
irrigation schedule | 1361 | 1608 | 19.038084 | 85 |
aerobic sequencing batch reactor | 738 | 776 | 19.037907 | 95 |
contamination of groundwater | 1680 | 2026 | 19.035229 | 83 |
water infrastructure | 3723 | 4445 | 19.032365 | 84 |
biological wastewater | 2568 | 3133 | 19.030617 | 82 |
contaminated drinking water | 1199 | 1401 | 19.028716 | 86 |
groundwater irrigation | 937 | 1049 | 19.028262 | 89 |
desalination membrane | 898 | 997 | 19.027096 | 90 |
desalination systems | 1189 | 1389 | 19.026972 | 86 |
water pollutants | 3394 | 4095 | 19.026432 | 83 |
synthetic wastewater | 4649 | 5436 | 19.026071 | 86 |
drinking water treatment | 5779 | 6550 | 19.025735 | 88 |
desalination process | 2694 | 3291 | 19.025729 | 82 |
water harvesting | 5236 | 6026 | 19.025403 | 87 |
sustainable water resources | 916 | 1023 | 19.024284 | 90 |
treatment wastewater | 1098 | 1269 | 19.024076 | 87 |
wastewater treatment plant effluent | 880 | 976 | 19.021240 | 90 |
nonpoint source pollution | 1920 | 2350 | 19.020520 | 82 |
drinking water production | 1098 | 1272 | 19.019933 | 86 |
water management model | 1571 | 1903 | 19.018122 | 83 |
water and sanitation | 3658 | 4413 | 19.014833 | 83 |
wastewater treatment process | 5457 | 6279 | 19.013181 | 87 |
municipal wastewater treatment | 5332 | 6177 | 19.006408 | 86 |
greywater | 1296 | 1550 | 19.005819 | 84 |
wastewater effluent | 4351 | 5181 | 19.005579 | 84 |
wastewater reclamation | 1338 | 1607 | 19.005110 | 83 |
water security. | 792 | 865 | 19.005011 | 92 |
water and wastewater treatment | 2357 | 2918 | 19.004916 | 81 |
sanitation services | 1034 | 1196 | 19.004572 | 86 |
drinking water standard | 2315 | 2867 | 19.004397 | 81 |
water harvest | 5365 | 6221 | 19.002603 | 86 |
sanitation system | 1054 | 1227 | 18.999252 | 86 |
scarcity of water | 1135 | 1338 | 18.998602 | 85 |
river water quality | 3085 | 3810 | 18.992981 | 81 |
swmm | 1754 | 2171 | 18.992158 | 81 |
raw wastewater | 1670 | 2061 | 18.992138 | 81 |
water treatment technology | 1735 | 2147 | 18.991457 | 81 |
wastewater system | 1957 | 2435 | 18.991107 | 80 |
water policies | 902 | 1024 | 18.990487 | 88 |
wastewater irrigation | 1207 | 1443 | 18.989829 | 84 |
urban water supply | 1248 | 1501 | 18.987219 | 83 |
drinking water quality | 4083 | 4944 | 18.986219 | 83 |
drinking water resource | 840 | 941 | 18.986055 | 89 |
organic wastewater | 1704 | 2113 | 18.985715 | 81 |
treatment wetland | 1260 | 1519 | 18.985255 | 83 |
stream water quality | 1456 | 1784 | 18.985242 | 82 |
water quality indicator | 1401 | 1711 | 18.984216 | 82 |
industrial wastewaters | 2584 | 3231 | 18.983237 | 80 |
dye wastewater treatment | 727 | 787 | 18.982201 | 92 |
point source pollution | 5155 | 6086 | 18.977829 | 85 |
water quality indicators | 1195 | 1437 | 18.977019 | 83 |
water pollutant | 4617 | 5539 | 18.975819 | 83 |
secondary effluent | 2613 | 3284 | 18.972878 | 80 |
water quality index | 4172 | 5078 | 18.971118 | 82 |
storm water management | 1447 | 1786 | 18.970937 | 81 |
saline waste | 1100 | 1311 | 18.970648 | 84 |
integrated water resources management (iwrm) | 607 | 627 | 18.970504 | 97 |
water quality guideline | 879 | 1004 | 18.970412 | 88 |
water, sanitation and hygiene | 820 | 922 | 18.970093 | 89 |
wqi | 2918 | 3658 | 18.969672 | 80 |
ro desalination | 799 | 893 | 18.969647 | 89 |
agricultural non-point source | 898 | 1031 | 18.969523 | 87 |
water, sanitation, and hygiene | 759 | 838 | 18.968350 | 91 |
integrated water resource management | 666 | 712 | 18.961409 | 94 |
efficient irrigation | 971 | 1139 | 18.959888 | 85 |
lake water quality | 1149 | 1388 | 18.958852 | 83 |
subsurface flow constructed wetlands | 650 | 692 | 18.956216 | 94 |
nitrate contamination | 1209 | 1474 | 18.955489 | 82 |
surface water quality | 3283 | 4118 | 18.954803 | 80 |
olive mill waste | 1789 | 2263 | 18.953905 | 79 |
vertical flow constructed wetland | 682 | 738 | 18.952823 | 92 |
sanitation facilities | 1123 | 1359 | 18.949580 | 83 |
sequencing batch | 6971 | 7929 | 18.949251 | 88 |
reverse osmosis desalination | 1160 | 1412 | 18.947913 | 82 |
water treatment processes | 4618 | 5619 | 18.947153 | 82 |
storm water management model | 916 | 1071 | 18.945388 | 86 |
wastewater systems | 1292 | 1599 | 18.944044 | 81 |
safe drinking water | 3485 | 4378 | 18.942864 | 80 |
irrigation strategy | 622 | 659 | 18.941652 | 94 |
improved sanitation | 965 | 1143 | 18.941021 | 84 |
water recycling | 2674 | 3415 | 18.940719 | 78 |
water effluents | 2064 | 2642 | 18.940525 | 78 |
wastewater streams | 1058 | 1275 | 18.939951 | 83 |
constructed wetland (cw) | 619 | 656 | 18.938682 | 94 |
oily waste | 2502 | 3207 | 18.937224 | 78 |
water quality improve | 2135 | 2740 | 18.936521 | 78 |
groundwater arsenic | 591 | 618 | 18.936013 | 96 |
textile wastewater treatment | 707 | 781 | 18.935442 | 91 |
rainwater harvesting system | 758 | 854 | 18.933684 | 89 |
water resource management | 7174 | 8179 | 18.932561 | 88 |
olive mill wastewater (omw) | 644 | 694 | 18.931419 | 93 |
water scarce | 691 | 761 | 18.929797 | 91 |
activated sludge (as) | 670 | 732 | 18.928274 | 92 |
irrigation water management | 916 | 1082 | 18.927806 | 85 |
water quality improvement | 1952 | 2513 | 18.927438 | 78 |
bank filtration | 743 | 836 | 18.927134 | 89 |
groundwater pollution | 3692 | 4653 | 18.926533 | 79 |
water quality assessment | 3186 | 4064 | 18.925952 | 78 |
sustainable water | 5792 | 6891 | 18.924657 | 84 |
water conservation measures | 883 | 1037 | 18.924475 | 85 |
influent and effluent | 1792 | 2304 | 18.923981 | 78 |
pollution water | 1821 | 2343 | 18.923944 | 78 |
wastewater treatment system | 4649 | 5726 | 18.920720 | 81 |
desalination processes | 1012 | 1224 | 18.920104 | 83 |
synthetic waste | 4792 | 5884 | 18.918727 | 81 |
treatment wetlands | 920 | 1094 | 18.917859 | 84 |
groundwater contaminant | 1096 | 1346 | 18.916996 | 81 |
treatment of wastewater | 5647 | 6772 | 18.916856 | 83 |
wastewater quality | 1052 | 1284 | 18.916040 | 82 |
crop water productivity | 573 | 601 | 18.914097 | 95 |
brackish water desalination | 739 | 837 | 18.913663 | 88 |
biological nutrient removal | 1247 | 1563 | 18.913607 | 80 |
drinking and irrigation | 926 | 1107 | 18.910984 | 84 |
disinfection byproducts | 1707 | 2207 | 18.909141 | 77 |
integrated water management | 843 | 990 | 18.906998 | 85 |
disinfection byproduct | 2018 | 2629 | 18.906778 | 77 |
oily wastewater treatment | 652 | 716 | 18.906372 | 91 |
domestic wastewater | 6494 | 7651 | 18.903410 | 85 |
and wastewater treatment | 6042 | 7211 | 18.903325 | 84 |
sewage treatment plants (stps) | 541 | 560 | 18.903049 | 97 |
potable reuse | 808 | 942 | 18.902644 | 86 |
thermal desalination | 864 | 1024 | 18.900735 | 84 |
water quality monitoring | 6181 | 7362 | 18.899259 | 84 |
urban wastewater treatment plant | 619 | 672 | 18.899000 | 92 |
safe drinking | 3650 | 4673 | 18.897444 | 78 |
contamination of water | 2454 | 3216 | 18.895659 | 76 |
desalination unit | 1048 | 1296 | 18.892017 | 81 |
clean drinking water | 817 | 961 | 18.891987 | 85 |
water treatment application | 1384 | 1777 | 18.891871 | 78 |
sanitation systems | 748 | 861 | 18.891803 | 87 |
rain-fed agriculture | 616 | 671 | 18.890934 | 92 |
drinking purposes | 1227 | 1555 | 18.890294 | 79 |
drinking water safety | 655 | 728 | 18.888708 | 90 |
agricultural non-point source pollution | 668 | 747 | 18.888157 | 89 |
treated wastewater | 8172 | 9263 | 18.887597 | 88 |
open defecation | 715 | 816 | 18.886097 | 88 |
coking wastewater | 773 | 901 | 18.884750 | 86 |
chloramination | 788 | 923 | 18.884466 | 85 |
irrigation water productivity | 535 | 558 | 18.884318 | 96 |
contaminated ground | 4876 | 6078 | 18.883186 | 80 |
membrane bioreactor (mbr) | 2259 | 2983 | 18.883092 | 76 |
chemical wastewater | 1099 | 1377 | 18.882594 | 80 |
total maximum daily load (tmdl) | 581 | 625 | 18.880390 | 93 |
drinking water resources | 675 | 761 | 18.879635 | 89 |
water quality monitor | 6229 | 7481 | 18.879124 | 83 |
sequencing batch reactors (sbrs) | 556 | 590 | 18.878313 | 94 |
drinking water standards | 1404 | 1819 | 18.878221 | 77 |
drinking water supply | 3217 | 4205 | 18.876860 | 77 |
smart irrigation | 759 | 885 | 18.876391 | 86 |
water quality guidelines | 728 | 840 | 18.875820 | 87 |
drinking purpose | 1823 | 2408 | 18.875425 | 76 |
water management system | 1830 | 2418 | 18.875127 | 76 |
hospital wastewater | 1020 | 1268 | 18.874775 | 80 |
reuse water | 915 | 1115 | 18.873852 | 82 |
desalination technology | 1000 | 1241 | 18.871670 | 81 |
water treatment systems | 4111 | 5269 | 18.870866 | 78 |
non-point source | 4911 | 6156 | 18.869719 | 80 |
water demand management | 627 | 696 | 18.868927 | 90 |
municipal wwtp | 524 | 548 | 18.867829 | 96 |
full-scale wastewater treatment plant | 540 | 571 | 18.867449 | 95 |
sequential batch reactor | 558 | 597 | 18.866982 | 93 |
constructed wetland | 9934 | 10882 | 18.864047 | 91 |
drinking water reservoir | 804 | 959 | 18.861882 | 84 |
drinking water system | 1089 | 1379 | 18.861499 | 79 |
water quality monitoring. | 702 | 809 | 18.861440 | 87 |
multi-effect distillation | 620 | 689 | 18.861347 | 90 |
water management. | 6158 | 7481 | 18.859519 | 82 |
arsenic in groundwater | 542 | 577 | 18.858614 | 94 |
tn removal | 1538 | 2032 | 18.857070 | 76 |
water treatment applications | 1154 | 1478 | 18.856820 | 78 |
anaerobic sequencing batch reactor | 496 | 512 | 18.855898 | 97 |
wastewater discharge | 4480 | 5725 | 18.855881 | 78 |
sustainable water resources management | 578 | 631 | 18.853503 | 92 |
drinking water disinfection | 627 | 703 | 18.852424 | 89 |
wastewater treatment technology | 839 | 1017 | 18.851198 | 82 |
effluent wastewater | 776 | 924 | 18.850338 | 84 |
sustainable water use | 542 | 580 | 18.850204 | 93 |
regulated deficit irrigation (rdi) | 501 | 522 | 18.847043 | 96 |
membrane desalination | 605 | 673 | 18.847037 | 90 |
groundwater contamination | 5582 | 6939 | 18.846619 | 80 |
source pollution | 5804 | 7171 | 18.845828 | 81 |
agricultural wastewater | 604 | 673 | 18.843457 | 90 |
disinfection by-products | 2976 | 3980 | 18.842075 | 75 |
treated municipal wastewater | 678 | 783 | 18.841710 | 87 |
untreated waste | 1529 | 2037 | 18.841125 | 75 |
water pollution. | 4084 | 5318 | 18.840625 | 77 |
water quality and quantity | 1093 | 1403 | 18.838676 | 78 |
conventional water treatment | 846 | 1035 | 18.838610 | 82 |
water resources allocation | 668 | 770 | 18.837784 | 87 |
refinery wastewater | 946 | 1185 | 18.837657 | 80 |
desalination performance | 1045 | 1333 | 18.837032 | 78 |
sustainable use of water | 596 | 664 | 18.836672 | 90 |
desalination plants | 2367 | 3206 | 18.834099 | 74 |
quality of drinking water | 1265 | 1662 | 18.832937 | 76 |
horizontal subsurface flow constructed wetland | 512 | 543 | 18.831554 | 94 |
water management plan | 1001 | 1272 | 18.830852 | 79 |
chemical oxygen demand (cod) removal | 1873 | 2537 | 18.830650 | 74 |
water supply systems | 3040 | 4085 | 18.830299 | 74 |
water quality degradation | 897 | 1117 | 18.829665 | 80 |
water quality deterioration | 958 | 1209 | 18.828925 | 79 |
irrigation technology | 890 | 1107 | 18.828882 | 80 |
basic sanitation | 718 | 849 | 18.828614 | 85 |
disinfection by-products (dbps) | 1202 | 1573 | 18.828599 | 76 |
water nitrate | 1767 | 2391 | 18.828466 | 74 |
wwtp effluents | 478 | 496 | 18.824717 | 96 |
river engineering | 916 | 1149 | 18.824429 | 80 |
drinking water supplies | 1492 | 2003 | 18.823733 | 74 |
soil and water conservation measure | 626 | 714 | 18.823382 | 88 |
discharge standard | 2387 | 3252 | 18.822747 | 73 |
actual wastewater | 700 | 825 | 18.822660 | 85 |
multi-reservoir | 711 | 842 | 18.821688 | 84 |
influent wastewater | 782 | 949 | 18.821409 | 82 |
water resources planning | 1723 | 2339 | 18.820372 | 74 |
water productivity (wp) | 477 | 496 | 18.820064 | 96 |
activated sludge system | 2212 | 3022 | 18.818980 | 73 |
water quality variables | 1252 | 1657 | 18.817702 | 76 |
arsenic contamination | 1703 | 2315 | 18.816797 | 74 |
disinfection by-product | 3484 | 4666 | 18.816670 | 75 |
water waste | 2140 | 2928 | 18.816160 | 73 |
nutrients removal | 899 | 1129 | 18.815924 | 80 |
cod removal efficiency | 2337 | 3198 | 18.814987 | 73 |
water effluent | 4862 | 6276 | 18.812905 | 77 |
effluent cod | 976 | 1248 | 18.812150 | 78 |
sludge retention time | 1020 | 1315 | 18.811413 | 78 |
sludge retention | 1091 | 1422 | 18.811377 | 77 |
water quality indices | 842 | 1046 | 18.810715 | 80 |
pollution of water | 1425 | 1920 | 18.810086 | 74 |
nitrogen and phosphorus removal | 1391 | 1872 | 18.808151 | 74 |
biological nitrogen removal | 1244 | 1654 | 18.808140 | 75 |
dwtp | 584 | 658 | 18.807445 | 89 |
soil and water conservation measures | 606 | 691 | 18.807253 | 88 |
water quality data | 3293 | 4456 | 18.805579 | 74 |
final effluent | 1680 | 2298 | 18.804060 | 73 |
sustainable groundwater management | 500 | 535 | 18.803106 | 93 |
water desalination system | 590 | 669 | 18.802461 | 88 |
irrigation schedules | 699 | 834 | 18.801505 | 84 |
sewage treatment plants | 3033 | 4142 | 18.799121 | 73 |
sludge volume index | 1011 | 1311 | 18.798649 | 77 |
arsenic removal | 2453 | 3384 | 18.797822 | 72 |
treatment and reuse | 960 | 1234 | 18.797811 | 78 |
water/wastewater | 718 | 866 | 18.795412 | 83 |
water resources planning and management | 710 | 854 | 18.795032 | 83 |
aerobic wastewater treatment | 748 | 912 | 18.794987 | 82 |
household water treatment | 475 | 501 | 18.794712 | 95 |
water treatment facilities | 2040 | 2824 | 18.793542 | 72 |
sustainable wastewater treatment | 473 | 499 | 18.791729 | 95 |
wastewater treatment facilities | 1363 | 1848 | 18.791232 | 74 |
water reuse | 8104 | 9632 | 18.790368 | 84 |
sewage system | 1721 | 2377 | 18.788485 | 72 |
water quality change | 1124 | 1491 | 18.788312 | 75 |
wastewater treatment applications | 526 | 579 | 18.787297 | 91 |
nonpoint source | 3178 | 4353 | 18.787041 | 73 |
groundwater protection | 1047 | 1375 | 18.786765 | 76 |
wwtp | 12361 | 13254 | 18.786329 | 93 |
nitritation | 1272 | 1717 | 18.785905 | 74 |
plating wastewater | 885 | 1128 | 18.785004 | 78 |
tertiary treatment | 1896 | 2634 | 18.784303 | 72 |
slaughterhouse wastewater | 557 | 627 | 18.783298 | 89 |
treated effluent | 3703 | 5024 | 18.779679 | 74 |
framework directive | 6387 | 8018 | 18.777290 | 80 |
rainwater harvesting (rwh) | 471 | 501 | 18.775938 | 94 |
waste water treatment plant | 1843 | 2571 | 18.775082 | 72 |
water allocations | 516 | 569 | 18.773300 | 91 |
non-potable | 878 | 1125 | 18.773151 | 78 |
wastewater discharges | 1110 | 1483 | 18.772516 | 75 |
water management systems | 860 | 1098 | 18.771835 | 78 |
defluoridation | 1151 | 1547 | 18.771099 | 74 |
drinking water treatment process | 516 | 570 | 18.770468 | 91 |
quality of groundwater | 1389 | 1910 | 18.769159 | 73 |
pharmaceutical waste | 1438 | 1984 | 18.768738 | 72 |
sewage treatment plant (stp) | 530 | 592 | 18.767995 | 90 |
sanitation and hygiene (wash) | 516 | 571 | 18.767642 | 90 |
influents | 1135 | 1526 | 18.767068 | 74 |
storm water management model (swmm) | 596 | 693 | 18.766584 | 86 |
aquaculture wastewater | 620 | 730 | 18.766144 | 85 |
virtual water | 1286 | 1758 | 18.765550 | 73 |
electrocoagulation (ec) | 1033 | 1371 | 18.764522 | 75 |
charge stand | 2392 | 3361 | 18.763959 | 71 |
water treatment sludge | 724 | 892 | 18.763442 | 81 |
drinking water systems | 808 | 1023 | 18.762662 | 79 |
full irrigation | 1411 | 1952 | 18.760881 | 72 |
processing wastewater | 1174 | 1593 | 18.759028 | 74 |
moving bed biofilm | 888 | 1150 | 18.758877 | 77 |
advanced wastewater treatment | 934 | 1222 | 18.758373 | 76 |
water managers | 1774 | 2497 | 18.756032 | 71 |
irrigation water quality | 984 | 1302 | 18.755411 | 76 |
low impact development | 1264 | 1736 | 18.753761 | 73 |
total suspended solids (tss) | 2839 | 3985 | 18.753442 | 71 |
water desalination | 8987 | 10615 | 18.753243 | 85 |
sustainable management of water resources | 476 | 516 | 18.752264 | 92 |
water resources management | 10093 | 11606 | 18.750098 | 87 |
lake restoration | 840 | 1082 | 18.748096 | 78 |
efficient use of water | 762 | 960 | 18.747584 | 79 |
water treatment and reuse | 562 | 649 | 18.746599 | 87 |
rainwater harvesting systems | 448 | 476 | 18.745962 | 94 |
nitrogen removal efficiency | 1427 | 1993 | 18.745517 | 72 |
water resources system | 1105 | 1500 | 18.743403 | 74 |
water treatment methods | 846 | 1095 | 18.742492 | 77 |
sanitation infrastructure | 508 | 568 | 18.741817 | 89 |
assessment of water quality | 1104 | 1501 | 18.740410 | 74 |
moving bed biofilm reactor | 845 | 1095 | 18.740041 | 77 |
enhanced biological phosphorus removal | 1030 | 1386 | 18.739654 | 74 |
disinfection byproducts (dbps) | 701 | 869 | 18.738913 | 81 |
wastewater samples | 4010 | 5509 | 18.737636 | 73 |
coagulation/flocculation | 793 | 1015 | 18.736879 | 78 |
solar distillation | 770 | 979 | 18.736409 | 79 |
water reclamation | 2727 | 3870 | 18.736238 | 70 |
reuse of wastewater | 621 | 745 | 18.736102 | 83 |
alternative water | 1601 | 2268 | 18.734963 | 71 |
wastewater pollution | 621 | 746 | 18.733892 | 83 |
water supply and demand | 845 | 1099 | 18.733823 | 77 |
influent cod | 1024 | 1382 | 18.732838 | 74 |
removal of cod | 1325 | 1851 | 18.732515 | 72 |
deficit irrigation (di) | 396 | 403 | 18.730984 | 98 |
surface water pollution | 659 | 807 | 18.730930 | 82 |
surface water treatment | 821 | 1063 | 18.730743 | 77 |
water scarcity | 12578 | 13767 | 18.730109 | 91 |
water-quality | 2446 | 3497 | 18.729905 | 70 |
sanitary sewer | 1055 | 1435 | 18.727586 | 74 |
runoff water quality | 577 | 680 | 18.727573 | 85 |
model wastewater | 598 | 713 | 18.727150 | 84 |
simultaneous nitrification | 1102 | 1510 | 18.726265 | 73 |
household water | 1700 | 2428 | 18.725831 | 70 |
biological phosphorus removal | 1583 | 2253 | 18.725184 | 70 |
hydraulic loading rate | 963 | 1293 | 18.723406 | 74 |
irrigation water use efficiency (iwue) | 427 | 452 | 18.720486 | 94 |
water treatment efficiency | 559 | 655 | 18.720001 | 85 |
reclaimed water | 2491 | 3578 | 18.719975 | 70 |
mbr system | 945 | 1267 | 18.719962 | 75 |
management of irrigation | 602 | 723 | 18.718645 | 83 |
tannery waste | 1323 | 1865 | 18.716047 | 71 |
wastewater sample | 4527 | 6192 | 18.715699 | 73 |
water quality standard | 3505 | 4941 | 18.714455 | 71 |
aerobic membrane bioreactor | 986 | 1337 | 18.713542 | 74 |
riverbank filtration | 409 | 427 | 18.713283 | 96 |
desalinated water | 1122 | 1553 | 18.713065 | 72 |
water standards | 1837 | 2650 | 18.712802 | 69 |
desalination plant | 4054 | 5637 | 18.710963 | 72 |
harvesting water | 506 | 576 | 18.710653 | 88 |
water remediation | 4970 | 6725 | 18.710270 | 74 |
polluted water | 6555 | 8458 | 18.709600 | 78 |
treatment of municipal wastewater | 598 | 721 | 18.708849 | 83 |
water quality model | 4070 | 5663 | 18.708697 | 72 |
water quality changes | 875 | 1164 | 18.707731 | 75 |
nitrate pollution | 1274 | 1799 | 18.705854 | 71 |
water health | 749 | 964 | 18.704496 | 78 |
soil and groundwater | 2762 | 3983 | 18.704121 | 69 |
irrigation technologies | 521 | 602 | 18.703473 | 87 |
textile waste | 3817 | 5365 | 18.703138 | 71 |
water law | 1170 | 1638 | 18.702978 | 71 |
water quality standards | 2513 | 3644 | 18.701307 | 69 |
water standard | 3036 | 4360 | 18.701072 | 70 |
agricultural water use | 757 | 980 | 18.699039 | 77 |
water treatment process | 8714 | 10636 | 18.698284 | 82 |
pit latrine | 564 | 672 | 18.697576 | 84 |
efficient water use | 572 | 685 | 18.696798 | 84 |
clean water and sanitation | 493 | 561 | 18.695874 | 88 |
groundwater use | 1322 | 1886 | 18.694515 | 70 |
seawater reverse osmosis | 879 | 1180 | 18.693748 | 74 |
grey water | 815 | 1077 | 18.693275 | 76 |
river basin management plan | 408 | 431 | 18.693154 | 95 |
wastewater sludge | 1596 | 2314 | 18.692258 | 69 |
wastewater use | 530 | 621 | 18.690643 | 85 |
biochemical oxygen demand (bod5) | 823 | 1092 | 18.690031 | 75 |
treated effluents | 996 | 1373 | 18.687940 | 73 |
olive mill | 1905 | 2788 | 18.687719 | 68 |
water, sanitation and hygiene (wash) | 450 | 497 | 18.687399 | 91 |
water quality issues | 775 | 1016 | 18.687300 | 76 |
european water framework directive (wfd) | 373 | 380 | 18.686844 | 98 |
electroplating wastewater | 687 | 874 | 18.686662 | 79 |
wastewater pollutant | 467 | 524 | 18.685476 | 89 |
total nitrogen removal | 1227 | 1746 | 18.684569 | 70 |
codmn | 965 | 1326 | 18.684030 | 73 |
removal of arsenic | 1464 | 2120 | 18.683924 | 69 |
effluent organic matter | 473 | 534 | 18.683538 | 89 |
sustainable water supply | 449 | 497 | 18.682456 | 90 |
groundwater quality | 9207 | 11184 | 18.680434 | 82 |
water quality status | 705 | 907 | 18.679426 | 78 |
good ecological status | 588 | 718 | 18.679394 | 82 |
water infrastructures | 447 | 495 | 18.678931 | 90 |
decentralized wastewater | 505 | 586 | 18.678631 | 86 |
coagulation-flocculation | 1039 | 1450 | 18.678553 | 72 |
water user | 2723 | 3983 | 18.678110 | 68 |
maximum contaminant level | 1067 | 1496 | 18.677623 | 71 |
irrigation purposes | 1573 | 2298 | 18.676867 | 68 |
good water quality | 812 | 1083 | 18.676187 | 75 |
reclaimed wastewater | 636 | 797 | 18.675853 | 80 |
swro | 878 | 1191 | 18.675513 | 74 |
sludge production | 1432 | 2081 | 18.674386 | 69 |
source of drinking water | 1437 | 2089 | 18.674260 | 69 |
effluent quality | 3307 | 4784 | 18.673842 | 69 |
polluted groundwater | 579 | 706 | 18.673740 | 82 |
sustainable water resource management | 411 | 441 | 18.673627 | 93 |
virtual water trade | 420 | 455 | 18.673060 | 92 |
sludge volume | 1448 | 2108 | 18.672775 | 69 |
non-point sources | 1122 | 1589 | 18.672757 | 71 |
monitoring water quality | 840 | 1131 | 18.672611 | 74 |
urban stormwater | 1824 | 2689 | 18.672231 | 68 |
activated sludge systems | 979 | 1358 | 18.672033 | 72 |
treated wastewater effluent | 443 | 491 | 18.671804 | 90 |
humidification-dehumidification | 493 | 570 | 18.670349 | 86 |
solar disinfection | 426 | 466 | 18.667155 | 91 |
wastewater (ww) | 440 | 488 | 18.666390 | 90 |
cod concentration | 1707 | 2519 | 18.666102 | 68 |
conventional wastewater treatment plant | 420 | 458 | 18.662719 | 92 |
treatment sludge | 1011 | 1418 | 18.662193 | 71 |
water treatment facility | 1164 | 1667 | 18.661723 | 70 |
constructed wetland systems | 417 | 454 | 18.660475 | 92 |
desalination energy | 422 | 462 | 18.659655 | 91 |
production wastewater | 548 | 662 | 18.659623 | 83 |
textile effluent | 1751 | 2597 | 18.658652 | 67 |
chemical water quality | 624 | 786 | 18.658140 | 79 |
drinking-water | 1806 | 2684 | 18.656797 | 67 |
water sludge | 1839 | 2736 | 18.655725 | 67 |
fecal indicator | 1344 | 1963 | 18.655283 | 68 |
sustainable irrigation | 432 | 479 | 18.654954 | 90 |
irrigation performance | 510 | 603 | 18.654165 | 85 |
discharge standards | 1002 | 1410 | 18.653927 | 71 |
partial nitrification | 932 | 1296 | 18.652620 | 72 |
water treatment membrane | 411 | 447 | 18.652418 | 92 |
international river | 591 | 735 | 18.652016 | 80 |
dbp formation | 624 | 789 | 18.651861 | 79 |
freshwater production | 667 | 860 | 18.650992 | 78 |
riparian restoration | 371 | 386 | 18.650343 | 96 |
water trade | 588 | 731 | 18.650020 | 80 |
nps pollution | 543 | 658 | 18.649587 | 83 |
oil wastewater | 551 | 671 | 18.649517 | 82 |
drinking water samples | 1647 | 2449 | 18.649173 | 67 |
anaerobic wastewater | 603 | 756 | 18.648939 | 80 |
petrochemical wastewater | 532 | 641 | 18.647559 | 83 |
managed aquifer recharge | 739 | 981 | 18.646945 | 75 |
low impact development (lid) | 714 | 941 | 18.644576 | 76 |
tile waste | 3848 | 5566 | 18.644236 | 69 |
water contaminant | 2851 | 4234 | 18.643890 | 67 |
drinking water sample | 1723 | 2575 | 18.643519 | 67 |
tile effluent | 1770 | 2649 | 18.642687 | 67 |
water users | 2146 | 3221 | 18.642029 | 67 |
aquifer vulnerability | 554 | 679 | 18.642003 | 82 |
water, sanitation, and hygiene (wash) | 432 | 483 | 18.641824 | 89 |
urban water system | 710 | 936 | 18.641683 | 76 |
desalination of seawater | 533 | 645 | 18.641573 | 83 |
alternative water source | 588 | 735 | 18.641086 | 80 |
wastewater infrastructure | 497 | 587 | 18.640915 | 85 |
real textile wastewater | 372 | 390 | 18.640465 | 95 |
water supply system | 6142 | 8296 | 18.640031 | 74 |
water quality modeling | 931 | 1304 | 18.639822 | 71 |
water quantity and quality | 1250 | 1828 | 18.639766 | 68 |
secondary wastewater | 655 | 846 | 18.639740 | 77 |
swine waste | 1355 | 1998 | 18.639566 | 68 |
haloacetic acid | 1310 | 1927 | 18.638095 | 68 |
sludge volume index (svi) | 537 | 653 | 18.637847 | 82 |
wastewater treatment efficiency | 421 | 467 | 18.637409 | 90 |
membrane bioreactors | 2060 | 3101 | 18.636716 | 66 |
irrigation purpose | 1858 | 2794 | 18.636361 | 66 |
contaminated waste | 2050 | 3087 | 18.636059 | 66 |
water crisis | 1822 | 2742 | 18.634028 | 66 |
dairy waste | 1343 | 1985 | 18.633842 | 68 |
best management practices (bmps) | 1300 | 1916 | 18.633258 | 68 |
livestock wastewater | 464 | 537 | 18.632200 | 86 |
acid wastewater | 493 | 584 | 18.631434 | 84 |
industrial wastewater treatment plant | 493 | 584 | 18.631434 | 84 |
mixed liquor suspended solid | 870 | 1209 | 18.631023 | 72 |
treated wastewaters | 531 | 646 | 18.630900 | 82 |
water treatment plant (wtp) | 436 | 493 | 18.629958 | 88 |
anaerobic wastewater treatment | 549 | 676 | 18.629587 | 81 |
water quality analysis | 1032 | 1480 | 18.629204 | 70 |
oil mill wastewater | 401 | 438 | 18.629032 | 92 |
water and wastewater | 6734 | 8982 | 18.629005 | 75 |
transboundary river basin | 383 | 410 | 18.628712 | 93 |
tmdls | 416 | 462 | 18.627645 | 90 |
water quality variation | 564 | 702 | 18.626422 | 80 |
vertical flow constructed wetlands | 376 | 400 | 18.625404 | 94 |
water contaminants | 1890 | 2860 | 18.625374 | 66 |
tp removal | 772 | 1049 | 18.625240 | 74 |
water shortages | 2670 | 4022 | 18.623428 | 66 |
municipal wastewaters | 625 | 805 | 18.622183 | 78 |
greywater treatment | 394 | 429 | 18.621909 | 92 |
settleability | 1048 | 1513 | 18.621712 | 69 |
anaerobic membrane bioreactor | 806 | 1109 | 18.620553 | 73 |
urban stormwater management | 480 | 567 | 18.620110 | 85 |
waste water treatment plants | 860 | 1200 | 18.620046 | 72 |
water quality evaluation | 829 | 1148 | 18.619982 | 72 |
municipal wastewater effluent | 438 | 500 | 18.617835 | 88 |
anaerobic membrane | 850 | 1185 | 18.617473 | 72 |
sludge floc | 1117 | 1632 | 18.616872 | 68 |
effluent water quality | 542 | 670 | 18.616281 | 81 |
water quality monitoring system | 525 | 642 | 18.616251 | 82 |
water guidelines | 472 | 556 | 18.614448 | 85 |
wastewater recycling | 525 | 643 | 18.613737 | 82 |
activated sludge reactor | 564 | 708 | 18.612557 | 80 |
water pricing | 799 | 1103 | 18.611690 | 72 |
simulated waste | 1796 | 2737 | 18.610100 | 66 |
water resource planning | 726 | 982 | 18.608085 | 74 |
scale waste | 1282 | 1914 | 18.607695 | 67 |
trihalomethanes (thms) | 1006 | 1455 | 18.607383 | 69 |
harvested rainwater | 364 | 386 | 18.607118 | 94 |
enhanced biological phosphorus removal (ebpr) | 639 | 836 | 18.606932 | 76 |
agricultural irrigation | 1684 | 2566 | 18.606187 | 66 |
reuse wastewater | 415 | 467 | 18.605351 | 89 |
water quality management | 2740 | 4161 | 18.605232 | 66 |
biological oxygen demand | 2620 | 3990 | 18.604214 | 66 |
treatment of effluent | 907 | 1291 | 18.603774 | 70 |
management of water | 5658 | 7896 | 18.603264 | 72 |
wwt | 13094 | 15013 | 18.601693 | 87 |
wastewater characteristic | 601 | 775 | 18.601085 | 78 |
water treatment system | 6862 | 9242 | 18.600619 | 74 |
water resource allocation | 409 | 459 | 18.599930 | 89 |
piggery wastewater | 435 | 501 | 18.599417 | 87 |
surface water contamination | 457 | 537 | 18.598651 | 85 |
biological wastewater treatment process | 468 | 555 | 18.598591 | 84 |
nonpoint | 3861 | 5714 | 18.597917 | 68 |
haloacetic acids | 1110 | 1639 | 18.596796 | 68 |
wastewater flow | 866 | 1227 | 18.596286 | 71 |
municipal sewage treatment | 688 | 925 | 18.595218 | 74 |
surface drip irrigation | 971 | 1406 | 18.595211 | 69 |
biochemical oxygen demand (bod) | 1938 | 2983 | 18.594408 | 65 |
activated sludge process | 3592 | 5368 | 18.594322 | 67 |
water qualities | 954 | 1378 | 18.594202 | 69 |
membrane distillation (md) | 1124 | 1665 | 18.594132 | 68 |
water safety plan | 391 | 432 | 18.593846 | 91 |
advanced water treatment | 522 | 646 | 18.593769 | 81 |
irrigation amount | 1202 | 1796 | 18.593687 | 67 |
land and water management | 499 | 608 | 18.593257 | 82 |
aerobic granular | 1787 | 2750 | 18.591805 | 65 |
treatment water | 1853 | 2855 | 18.591221 | 65 |
aerobic granule | 923 | 1328 | 18.590814 | 70 |
rural water | 1584 | 2428 | 18.589967 | 65 |
safe water | 2357 | 3631 | 18.589800 | 65 |
drinking water guidelines | 384 | 422 | 18.589693 | 91 |
receiving water bodies | 712 | 969 | 18.589624 | 73 |
mixed liquor | 2042 | 3153 | 18.589121 | 65 |
% cod removal | 785 | 1094 | 18.588936 | 72 |
municipal wastewater | 12350 | 14484 | 18.588662 | 85 |
wine waste | 1371 | 2082 | 18.588573 | 66 |
nutrient removal | 5484 | 7752 | 18.588046 | 71 |
water quality models | 962 | 1397 | 18.587459 | 69 |
cod removal rate | 1207 | 1811 | 18.587160 | 67 |
complex wastewater | 506 | 622 | 18.587053 | 81 |
sewage systems | 782 | 1091 | 18.585642 | 72 |
secondary effluents | 564 | 720 | 18.585175 | 78 |
aerobic granular sludge | 1643 | 2530 | 18.584929 | 65 |
transboundary waters | 361 | 387 | 18.584341 | 93 |
polluted waters | 1226 | 1846 | 18.584060 | 66 |
suspended solids (ss) | 1017 | 1494 | 18.583305 | 68 |
wastewater treatment methods | 430 | 498 | 18.583229 | 86 |
non-point | 5695 | 8016 | 18.583193 | 71 |
efficient water management | 422 | 485 | 18.583162 | 87 |
water meter | 1042 | 1537 | 18.582701 | 68 |
water and sanitation services | 436 | 508 | 18.582584 | 86 |
surface drip | 1134 | 1694 | 18.581383 | 67 |
fecal indicator bacteria | 855 | 1219 | 18.581236 | 70 |
water management policies | 441 | 517 | 18.580073 | 85 |
water conservation practices | 461 | 550 | 18.579824 | 84 |
distillery wastewater | 464 | 555 | 18.579700 | 84 |
sludge reduction | 833 | 1183 | 18.578779 | 70 |
reverse osmosis (ro) desalination | 372 | 406 | 18.578118 | 92 |
diffuse pollution | 1138 | 1704 | 18.578023 | 67 |
domestic wastewater treatment plant | 377 | 414 | 18.577981 | 91 |
simultaneous nitrification and denitrification | 744 | 1031 | 18.577475 | 72 |
wastewater treatment. | 15057 | 16740 | 18.577383 | 90 |
wastewater characteristics | 576 | 744 | 18.576925 | 77 |
hydraulic retention time (hrt) | 3158 | 4819 | 18.576869 | 66 |
cod removal. | 689 | 937 | 18.576788 | 74 |
water safety | 1759 | 2730 | 18.575274 | 64 |
stormwater treatment | 807 | 1141 | 18.574854 | 71 |
crop evapotranspiration (etc) | 727 | 1004 | 18.573809 | 72 |
zero liquid discharge | 600 | 787 | 18.572313 | 76 |
aerobic granules | 824 | 1172 | 18.572310 | 70 |
biological activated carbon | 670 | 907 | 18.572081 | 74 |
nh4+-n removal | 601 | 789 | 18.571703 | 76 |
surface water and groundwater | 1968 | 3068 | 18.570946 | 64 |
mbbr | 1022 | 1514 | 18.570026 | 68 |
groundwater quality assessment | 442 | 522 | 18.569850 | 85 |
radioactive wastewater | 490 | 602 | 18.569409 | 81 |
textile wastewaters | 413 | 475 | 18.567888 | 87 |
organic matter removal | 1245 | 1895 | 18.567826 | 66 |
microbial water quality | 483 | 591 | 18.567469 | 82 |
vfcw | 357 | 385 | 18.567056 | 93 |
permeable reactive barrier | 1095 | 1642 | 18.566425 | 67 |
sludge flocs | 770 | 1083 | 18.566003 | 71 |
sewage treatment plant | 6143 | 8598 | 18.565949 | 71 |
groundwater contaminants | 526 | 664 | 18.565938 | 79 |
submerged membrane | 994 | 1470 | 18.565350 | 68 |
wetland system | 2097 | 3281 | 18.564218 | 64 |
turbidity removal | 1271 | 1943 | 18.563939 | 65 |
non-point source (nps) | 392 | 442 | 18.563876 | 89 |
water quality criteria | 1280 | 1959 | 18.563172 | 65 |
wastewater treatment facility | 765 | 1078 | 18.560292 | 71 |
municipal and industrial wastewater | 532 | 677 | 18.559141 | 79 |
phenol wastewater | 484 | 596 | 18.558514 | 81 |
sustainable use of water resources | 358 | 389 | 18.557452 | 92 |
waste-water treatment | 712 | 988 | 18.557136 | 72 |
conventional activated sludge (cas) | 330 | 345 | 18.556186 | 96 |
cod reduction | 1245 | 1909 | 18.554735 | 65 |
process wastewater | 635 | 856 | 18.554553 | 74 |
benchmark simulation model | 361 | 395 | 18.552728 | 91 |
waste-water | 1742 | 2737 | 18.552103 | 64 |
disinfection of water | 543 | 699 | 18.551543 | 78 |
domestic effluent | 526 | 670 | 18.551401 | 79 |
trihalomethanes | 2356 | 3704 | 18.551220 | 64 |
wastewater collection | 745 | 1049 | 18.551167 | 71 |
mixed liquor suspended solids | 738 | 1037 | 18.550853 | 71 |
biological oxygen demand (bod) | 1047 | 1574 | 18.550786 | 67 |
aerobic activated sludge | 462 | 562 | 18.550246 | 82 |
sand filtration | 1391 | 2161 | 18.549819 | 64 |
sewer overflows | 1224 | 1879 | 18.549382 | 65 |
deficit irrigation strategies | 311 | 317 | 18.548759 | 98 |
wastewater generation | 417 | 488 | 18.546933 | 85 |
anmbr | 643 | 874 | 18.546665 | 74 |
activated sludge wastewater treatment | 523 | 667 | 18.546264 | 78 |
water demands | 2428 | 3824 | 18.545969 | 63 |
urban water cycle | 424 | 500 | 18.545704 | 85 |
subsurface drip | 905 | 1332 | 18.545545 | 68 |
electrocoagulation process | 807 | 1161 | 18.545371 | 70 |
activated sludge floc | 478 | 591 | 18.544692 | 81 |
surface and groundwater | 2541 | 4000 | 18.543437 | 64 |
uv254 | 1391 | 2169 | 18.543170 | 64 |
dwtps | 323 | 337 | 18.542835 | 96 |
olive mill wastewaters | 350 | 380 | 18.542230 | 92 |
drinking water reservoirs | 420 | 495 | 18.540472 | 85 |
runoff pollution | 484 | 603 | 18.539828 | 80 |
transboundary rivers | 349 | 379 | 18.539783 | 92 |
crop irrigation | 887 | 1305 | 18.539761 | 68 |
water quality characteristics | 702 | 981 | 18.539423 | 72 |
biological water quality | 509 | 646 | 18.538989 | 79 |
wastewater treatment and reuse | 398 | 459 | 18.538954 | 87 |
wastewater treatment plant effluents | 368 | 410 | 18.538506 | 90 |
water fluoride | 786 | 1129 | 18.538298 | 70 |
salinity wastewater | 405 | 471 | 18.537515 | 86 |
pollutant load | 2253 | 3573 | 18.536914 | 63 |
total maximum daily loads | 364 | 404 | 18.536630 | 90 |
activated sludge processes | 645 | 883 | 18.536284 | 73 |
sewage wastewater | 496 | 625 | 18.535832 | 79 |
urban water systems | 510 | 649 | 18.535792 | 79 |
subsurface drip irrigation | 785 | 1129 | 18.535667 | 70 |
removal of pharmaceuticals | 495 | 624 | 18.534005 | 79 |
mill waste | 2999 | 4698 | 18.533681 | 64 |
pollution of groundwater | 576 | 764 | 18.533603 | 75 |
use of water resources | 1207 | 1867 | 18.533176 | 65 |
wfd | 2530 | 4005 | 18.533117 | 63 |
solar desalination system | 372 | 418 | 18.532950 | 89 |
wetland protection | 463 | 570 | 18.532498 | 81 |
water protection | 2268 | 3607 | 18.531272 | 63 |
water membrane | 835 | 1220 | 18.531261 | 68 |
treatment performance | 2587 | 4095 | 18.531254 | 63 |
contaminated water | 13478 | 15817 | 18.531107 | 85 |
water quality impact | 703 | 988 | 18.530524 | 71 |
water quality class | 479 | 598 | 18.530446 | 80 |
toilet flushing | 476 | 593 | 18.530118 | 80 |
water conflict | 643 | 883 | 18.529721 | 73 |
pollutant loads | 969 | 1457 | 18.529349 | 67 |
desalination membranes | 395 | 457 | 18.528852 | 86 |
treated wastewater (tww) | 307 | 315 | 18.528487 | 97 |
groundwater treatment | 721 | 1022 | 18.526725 | 71 |
decentralized wastewater treatment | 392 | 453 | 18.525514 | 87 |
food and water security | 330 | 352 | 18.525492 | 94 |
nitrogen removal process | 712 | 1007 | 18.525266 | 71 |
total suspended solids | 5503 | 8016 | 18.524991 | 69 |
biological waste | 2814 | 4448 | 18.524870 | 63 |
water price | 972 | 1467 | 18.523744 | 66 |
water demand. | 1373 | 2162 | 18.523663 | 64 |
water for irrigation | 2248 | 3591 | 18.523308 | 63 |
pharmaceuticals and personal care products | 1203 | 1871 | 18.522837 | 64 |
excess sludge | 1219 | 1900 | 18.521592 | 64 |
tn and tp | 1530 | 2431 | 18.521044 | 63 |
monitoring of water quality | 715 | 1015 | 18.520801 | 70 |
water desalination plant | 708 | 1003 | 18.520156 | 71 |
water footprint | 2169 | 3473 | 18.520098 | 62 |
water management strategy | 425 | 510 | 18.519730 | 83 |
bod5 | 5141 | 7597 | 18.519351 | 68 |
water quality impairment | 369 | 417 | 18.518408 | 88 |
toilet flush | 526 | 684 | 18.517982 | 77 |
wastewater pollutants | 361 | 404 | 18.517921 | 89 |
drinking water contamination | 405 | 477 | 18.517684 | 85 |
wastewater influent | 405 | 477 | 18.517684 | 85 |
urban wastewater treatment plants | 335 | 362 | 18.516993 | 93 |
crop water requirement | 1221 | 1909 | 18.516432 | 64 |
aerobic granular sludge (ags) | 531 | 694 | 18.514949 | 77 |
advanced oxidation processes (aops) | 1672 | 2677 | 18.514841 | 62 |
source water quality | 399 | 468 | 18.514199 | 85 |
direct potable reuse | 379 | 435 | 18.513017 | 87 |
water quality simulation | 537 | 706 | 18.511432 | 76 |
on-site wastewater | 441 | 540 | 18.511181 | 82 |
chemical wastewater treatment | 441 | 540 | 18.511181 | 82 |
water planning | 878 | 1311 | 18.511105 | 67 |
available water resources | 933 | 1409 | 18.510678 | 66 |
domestic sewage treatment | 459 | 571 | 18.510658 | 80 |
improved water quality | 681 | 961 | 18.510137 | 71 |
pollutants removal | 1666 | 2674 | 18.510052 | 62 |
submerged membrane bioreactor | 656 | 917 | 18.509388 | 72 |
reactive barrier | 1241 | 1952 | 18.508800 | 64 |
drinking water well | 462 | 577 | 18.508324 | 80 |
phenolic wastewater | 478 | 605 | 18.507280 | 79 |
pit latrines | 416 | 499 | 18.506555 | 83 |
water risk | 756 | 1097 | 18.506300 | 69 |
reuse of treated wastewater | 342 | 376 | 18.505933 | 91 |
water quality improvements | 501 | 646 | 18.504579 | 78 |
codcr | 1402 | 2236 | 18.503692 | 63 |
efficiency of wastewater treatment | 361 | 408 | 18.502699 | 88 |
reverse osmosis (ro) | 4576 | 6944 | 18.502501 | 66 |
groundwater and surface water | 1602 | 2578 | 18.502224 | 62 |
horizontal subsurface flow constructed wetlands | 311 | 327 | 18.501646 | 95 |
groundwater vulnerability assessment | 345 | 382 | 18.501471 | 90 |
water management decisions | 383 | 445 | 18.501235 | 86 |
ballast water treatment | 457 | 571 | 18.501071 | 80 |
real wastewater treatment | 304 | 316 | 18.501033 | 96 |
sewer overflow | 1868 | 3022 | 18.501020 | 62 |
textile industry wastewater | 396 | 467 | 18.500689 | 85 |
drinking water treatment processes | 322 | 345 | 18.499977 | 93 |
drastic model | 394 | 464 | 18.499444 | 85 |
waste water treatment | 5378 | 7964 | 18.499368 | 68 |
stormwater runoff | 2481 | 4001 | 18.499273 | 62 |
freshwater resources | 1824 | 2953 | 18.498924 | 62 |
water uses | 1245 | 1970 | 18.498794 | 63 |
water quality parameters | 7709 | 10630 | 18.498051 | 73 |
cod/n | 589 | 804 | 18.497819 | 73 |
ammonium removal | 952 | 1454 | 18.497180 | 65 |
seawater reverse osmosis (swro) | 452 | 564 | 18.496500 | 80 |
ecological water | 1067 | 1660 | 18.495644 | 64 |
groundwater samples | 5864 | 8565 | 18.495643 | 68 |
mbr process | 473 | 601 | 18.494896 | 79 |
septic tanks | 885 | 1337 | 18.493632 | 66 |
safety of drinking water | 446 | 555 | 18.492626 | 80 |
soluble microbial product | 961 | 1474 | 18.492549 | 65 |
effluent treatment | 3812 | 5959 | 18.491897 | 64 |
recycled water | 1338 | 2141 | 18.490950 | 62 |
urban storm | 2212 | 3596 | 18.490839 | 62 |
irrigation practice | 1497 | 2416 | 18.490356 | 62 |
water sector | 2247 | 3654 | 18.489617 | 61 |
mlvss | 629 | 880 | 18.488818 | 71 |
swine wastewater treatment | 303 | 317 | 18.488654 | 96 |
irrigation water supply | 406 | 488 | 18.487452 | 83 |
residual sodium carbonate | 536 | 715 | 18.486899 | 75 |
potable water supply | 573 | 781 | 18.486507 | 73 |
ewater source | 490 | 634 | 18.486407 | 77 |
textile effluents | 849 | 1278 | 18.486134 | 66 |
bioretention | 982 | 1518 | 18.485143 | 65 |
sludge retention time (srt) | 468 | 596 | 18.484985 | 79 |
sludge waste | 1563 | 2537 | 18.484324 | 62 |
organic wastewater treatment | 332 | 365 | 18.483850 | 91 |
anammox process | 1097 | 1726 | 18.482526 | 64 |
olive oil mill wastewater | 331 | 364 | 18.481167 | 91 |
point-source pollution | 439 | 547 | 18.480780 | 80 |
household drinking water | 315 | 338 | 18.480779 | 93 |
trihalomethane | 2888 | 4662 | 18.480777 | 62 |
finished water | 718 | 1046 | 18.479156 | 69 |
drinking waters | 1200 | 1913 | 18.478587 | 63 |
desalination water | 322 | 350 | 18.478056 | 92 |
agricultural water | 5157 | 7772 | 18.478047 | 66 |
wastewater treatment plants | 16139 | 18357 | 18.476961 | 88 |
cod and bod | 792 | 1182 | 18.476339 | 67 |
septic tank | 1711 | 2801 | 18.475496 | 61 |
sbr system | 549 | 744 | 18.473923 | 74 |
sanitary sewer overflow | 322 | 351 | 18.473710 | 92 |
sewage effluent | 2146 | 3523 | 18.473434 | 61 |
irrigation practices | 1216 | 1947 | 18.473391 | 62 |
fluoride removal | 1264 | 2032 | 18.473308 | 62 |
water management plans | 384 | 455 | 18.472489 | 84 |
water supply infrastructure | 352 | 401 | 18.472327 | 88 |
metal wastewater | 391 | 467 | 18.472311 | 84 |
water quality parameter | 8065 | 11147 | 18.471066 | 72 |
groundwater as | 1397 | 2269 | 18.470394 | 62 |
industrial wastewater | 14821 | 17375 | 18.469157 | 85 |
soluble microbial products | 870 | 1329 | 18.469114 | 65 |
partial nitritation | 593 | 826 | 18.468006 | 72 |
limited water resources | 905 | 1394 | 18.467367 | 65 |
indicators of water quality | 516 | 688 | 18.467094 | 75 |
uasb reactor | 1464 | 2392 | 18.465545 | 61 |
full-scale wwtp | 295 | 309 | 18.465459 | 95 |
industrial wastewater discharge | 381 | 452 | 18.465222 | 84 |
cultural water | 5198 | 7874 | 18.464829 | 66 |
aquaculture waste | 679 | 984 | 18.464609 | 69 |
groundwater sample | 6142 | 9028 | 18.464191 | 68 |
biological treatment process | 859 | 1313 | 18.463901 | 65 |
volatile suspended solids | 1091 | 1734 | 18.463520 | 63 |
bottled waters | 353 | 405 | 18.463451 | 87 |
domestic sewage | 3158 | 5107 | 18.463444 | 62 |
wastewater composition | 405 | 494 | 18.462819 | 82 |
fecal contamination | 1652 | 2720 | 18.462738 | 61 |
wetland systems | 1018 | 1603 | 18.462716 | 64 |
chemical oxygen demand removal | 700 | 1024 | 18.461813 | 68 |
total suspended solid | 6110 | 9002 | 18.461438 | 68 |
water treatment residual | 438 | 552 | 18.461365 | 79 |
freshwater resource | 2009 | 3322 | 18.461031 | 60 |
waterborne disease | 1322 | 2149 | 18.460862 | 62 |
water sanitation | 419 | 519 | 18.460694 | 81 |
hydraulic retention times | 1381 | 2254 | 18.460028 | 61 |
nitrate in groundwater | 364 | 425 | 18.458258 | 86 |
advanced treatment process | 392 | 473 | 18.458093 | 83 |
freshwater management | 294 | 309 | 18.457611 | 95 |
wastewater source | 448 | 571 | 18.457405 | 78 |
bod5/cod | 717 | 1058 | 18.457156 | 68 |
drinking water fluoride | 373 | 441 | 18.455915 | 85 |
conventional activated sludge process | 395 | 479 | 18.455412 | 82 |
water quality modelling | 591 | 829 | 18.454886 | 71 |
effluent water | 1734 | 2872 | 18.454721 | 60 |
fluoride in drinking water | 529 | 717 | 18.454080 | 74 |
integrated water | 4539 | 7064 | 18.453851 | 64 |
nitrogen removal performance | 689 | 1009 | 18.453384 | 68 |
allocation of water | 1005 | 1588 | 18.453343 | 63 |
effluent concentrations | 1182 | 1909 | 18.452555 | 62 |
european union water framework directive | 277 | 283 | 18.451357 | 98 |
colored wastewater | 330 | 370 | 18.449284 | 89 |
wastewater contaminant | 319 | 352 | 18.447972 | 91 |
omww | 322 | 357 | 18.447888 | 90 |
anoxic/aerobic | 371 | 440 | 18.447369 | 84 |
water/wastewater treatment | 297 | 316 | 18.447290 | 94 |
water contamination | 11916 | 15056 | 18.446556 | 79 |
effluent treatment plant | 777 | 1176 | 18.445583 | 66 |
smart irrigation system | 366 | 432 | 18.445311 | 85 |
water quality impacts | 574 | 803 | 18.444882 | 71 |
oil mill waste | 484 | 640 | 18.444528 | 76 |
wastewater treatment performance | 319 | 353 | 18.443655 | 90 |
arsenic-contaminated water | 286 | 299 | 18.443232 | 96 |
wastewater plant | 733 | 1097 | 18.442277 | 67 |
discharge limit | 1053 | 1687 | 18.441122 | 62 |
contaminants of emerging concern | 996 | 1583 | 18.440806 | 63 |
electroplating waste | 747 | 1124 | 18.440581 | 66 |
municipal sewage treatment plant | 508 | 685 | 18.440373 | 74 |
domestic and industrial wastewater | 427 | 540 | 18.440016 | 79 |
multi-reservoir system | 334 | 379 | 18.439942 | 88 |
sludge blanket | 2130 | 3560 | 18.439933 | 60 |
dbps | 2682 | 4447 | 18.438430 | 60 |
discharge limits | 737 | 1107 | 18.438313 | 67 |
personal care products (ppcps) | 998 | 1590 | 18.437161 | 63 |
biochemical oxygen demand | 4960 | 7676 | 18.437064 | 65 |
treatment of effluents | 573 | 806 | 18.435080 | 71 |
phosphorus removal | 5812 | 8758 | 18.434531 | 66 |
wetland treatment | 410 | 512 | 18.433939 | 80 |
ebpr | 936 | 1480 | 18.432390 | 63 |
agriculture water | 552 | 769 | 18.431905 | 72 |
haloacetic acids (haas) | 523 | 716 | 18.431781 | 73 |
water irrigation | 3393 | 5540 | 18.431229 | 61 |
quality water | 5072 | 7844 | 18.430901 | 65 |
crop evapotranspiration | 2179 | 3658 | 18.430850 | 60 |
phosphate accumulating organism | 472 | 624 | 18.430348 | 76 |
water withdrawals | 961 | 1528 | 18.430315 | 63 |
permanganate index | 488 | 654 | 18.427757 | 75 |
water markets | 645 | 943 | 18.427517 | 68 |
coagulant dosage | 739 | 1118 | 18.427311 | 66 |
water market | 1010 | 1622 | 18.426440 | 62 |
water issue | 1047 | 1691 | 18.425610 | 62 |
planning and management of water resources | 314 | 349 | 18.424847 | 90 |
total dissolved solids (tds) | 2595 | 4342 | 18.424607 | 60 |
ballast water management | 385 | 471 | 18.424494 | 82 |
greywater reuse | 280 | 293 | 18.424445 | 96 |
water quantity | 2914 | 4841 | 18.423851 | 60 |
surface flow wetland | 359 | 426 | 18.423494 | 84 |
aerated filter | 670 | 992 | 18.423230 | 68 |
winery wastewater | 322 | 363 | 18.422497 | 89 |
drinking and irrigation purposes | 346 | 404 | 18.421981 | 86 |
waste-activated sludge | 313 | 348 | 18.421904 | 90 |
artificial wastewater | 433 | 557 | 18.421845 | 78 |
aquifer recharge | 1572 | 2643 | 18.420715 | 59 |
upflow anaerobic sludge blanket | 1318 | 2191 | 18.420335 | 60 |
nitrate removal | 2324 | 3917 | 18.419997 | 59 |
tube well | 823 | 1280 | 18.419918 | 64 |
waterborne diseases | 846 | 1324 | 18.418587 | 64 |
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