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Topic · Water Science and Technology

Water Quality and Pollution Assessment

Water Quality and Pollution Assessment is a research topic within Water Science and Technology. Science Explorer counts 40k research works in it since 1950. 10.3% of them reached the world's top 10% most cited for their field and year.

This cluster of papers focuses on the assessment of surface water quality, utilizing multivariate statistical techniques, water quality indices, and spatial and temporal variations analysis. The impact of land use, urbanization, and environmental factors on water quality is extensively explored. Additionally, the cluster covers groundwater quality assessment and the use of chemometric analysis in evaluating water pollution sources.

  • Multivariate Statistical Techniques
  • Water Quality Index
  • Spatial and Temporal Variations
  • Land Use Impact
  • Principal Component Analysis
  • Groundwater Quality Assessment
  • Surface Water Pollution
  • Chemometric Analysis
  • Urbanization Effects
  • Environmental Impact
Research works
40k
fractional, since 1950
In the world top 10%
4.1k
per year above
Top-10% rate
10.3%
share of its works in the world top 10%
Growth, 2018-21 → 2022-25
+9%
the tick is no change
Largest producer
India
26% of the 10 largest, 2022-now
Water Quality and Pollution Assessment

Which countries lead Water Quality and Pollution Assessment research?

By volume, India and China publish the most (1.7k and 1.4k works in 2022-now).

By volume, 2022-now

  1. 1 India 1.7k works
  2. 2 China 1.4k works
  3. 3 Brazil 830 works
  4. 4 Nigeria 763 works
  5. 5 United States 464 works
  6. 6 Iraq 392 works
  7. 7 Indonesia 322 works
  8. 8 Bangladesh 249 works
  9. 9 Türkiye 228 works
  10. 10 Egypt 222 works

How concentrated that is

The same countries as shares of everything the list above accounts for. A node where two countries do two thirds of the work and one spread evenly across twelve read alike as a ranking and not at all alike here.

India: 25.6%China: 21.5%Brazil: 12.7%Nigeria: 11.6%6 others listed: 28.6%26%largest
India1,674 · 25.6%China1,409 · 21.5%Brazil830 · 12.7%Nigeria763 · 11.6%6 others listed1,877 · 28.6%

Shares of the rows listed above, not of the whole node.

Which institutions lead Water Quality and Pollution Assessment research?

By volume in 2022-now, Chinese Academy of Sciences publishes the most Water Quality and Pollution Assessment research, followed by University of Baghdad and Tribhuvan University.

By volume, 2022-now

  1. 1 Chinese Academy of SciencesChina 131 works
  2. 2 University of BaghdadIraq 69 works
  3. 3 Tribhuvan UniversityNepal 46 works
  4. 4 University of BasrahIraq 45 works
  5. 5 University of Port HarcourtNigeria 44 works
  6. 6 Rivers State UniversityNigeria 39 works
  7. 7 Indian Council of Agricultural ResearchIndia 38 works
  8. 8 Hohai UniversityChina 38 works
  9. 9 National Institute of Oceanography and FisheriesEgypt 36 works
  10. 10 Beijing Normal UniversityChina 34 works

Who are the leading researchers in Water Quality and Pollution Assessment?

The most-cited researchers publishing on Water Quality and Pollution Assessment include Sudhir Kumar, Xiaogang Wang and Guangming Zeng.

  1. 1 Sudhir Kumar United States 295k citations
  2. 2 Xiaogang Wang China 260k citations
  3. 3 Guangming Zeng China 204k citations
  4. 4 Seeram Ramakrishna Singapore 186k citations
  5. 5 Vivekanand Jha India 180k citations
  6. 6 J. Mueller France 178k citations

Ranked by citations received across their whole record, among researchers with at least three works on this topic.

What are the most cited papers in Water Quality and Pollution Assessment?

The most cited paper in Water Quality and Pollution Assessment is "An ecological risk index for aquatic pollution control.a sedimentological approach" (Lars Håkanson, 1980), with 9,700 citations. Next come "A manual of chemical and biological methods for sea water analysis" (4,563) and "Environmental science and pollution research" (4,517).

Most cited papers
#PaperReleasedCitations
1 An ecological risk index for aquatic pollution control.a sedimentological approach Lars Håkanson · Water Research 1980 9,700
2 A manual of chemical and biological methods for sea water analysis Emma Butler · Deep Sea Research Part A Oceanographic Research Papers Dec 1984 4,563
3 Environmental science and pollution research O. Hutzinger · Umweltwissenschaften und Schadstoff-Forschung Apr 1993 4,517
4 Problems in the assessment of heavy-metal levels in estuaries and the formation of a pollution index D. L. Tomlinson, James G. Wilson, C. R. Harris et al. · Helgoland Marine Research Open access Mar 1980 3,996
5 DETERMINATION OF AMMONIA IN NATURAL WATERS BY THE PHENOLHYPOCHLORITE METHOD 1 1 This research was fully supported by U.S. Atomic Energy Commission Contract No. ATS (11‐1) GEN 10, P.A. 20. Lucia Solórzano · Limnology and Oceanography Sep 1969 3,525
All 100 most cited papers, with filters and sorting

Where is Water Quality and Pollution Assessment research done?

The largest centres of Water Quality and Pollution Assessment research in 2022-now are Beijing (China), Dhaka (Bangladesh), Baghdad (Iraq) and Nanjing (China).

Largest cities, 2022-now

  1. 1 BeijingChina 385 works
  2. 2 DhakaBangladesh 138 works
  3. 3 BaghdadIraq 119 works
  4. 4 NanjingChina 109 works
  5. 5 New DelhiIndia 94 works
  6. 6 São PauloBrazil 84 works
  7. 7 Port HarcourtNigeria 83 works
  8. 8 ChennaiIndia 79 works
  9. 9 WuhanChina 73 works
  10. 10 CairoEgypt 60 works
See Water Quality and Pollution Assessment on the map

Where is the best place to study Water Quality and Pollution Assessment?

Among universities, judged by research, Giresun University, Beijing Normal University and King Saud University score highest, combining excellence, specialisation, size, growth and international reach. Research strength is one signal when choosing where to study; it does not measure teaching.

0%20%40%60%mean 31.07%fractional works in this field (log) →share of work in the world top 10% →Giresun UniversityChukwuemeka Odumegwu…King Saud UniversityBeijing Normal Unive…
above the meannear itbelow it

One dot per university in the first ten of the table below, at the default weights. The upper left is the interesting corner: small places doing unusually strong work.

Excellenceshare of its work in the world top 10%, 2022-now and all time averaged
40%
Specialisationhow much of its work is in this field, counted up to 10× the world share
10%
Sizeits output in this field, on a log scale
30%
Growthoutput growth, counted from -20% to +20%
10%
Internationalshare of its work with a co-author abroad
10%
Each slider sets a weight; the share it gets of the score is beside it.
#UniversityScoreTop 10%SpecialisationWorksGrowth
1Giresun UniversityTürkiye 65.254.8%10.8×11 +44.4%
2Beijing Normal UniversityChina 63.527.3%5.1×34 +6.9%
3King Saud UniversitySaudi Arabia 62.430.2%2.4×20 +146.1%
4Chukwuemeka Odumegwu Ojukwu UniversityNigeria 61.035.5%32.6×16 +102.2%
5China University of Geosciences (Beijing)China 60.541.8%5.0×12 +20.7%
6University of PeshawarPakistan 58.436.8%13.0×9 +31.5%
7University of Chinese Academy of SciencesChina 53.730.5%1.8×24 +9.4%
8University of BaghdadIraq 53.41.4%11.6×69 +85.8%
9Vivekananda Global UniversityIndia 53.132.4%17.4×11 +513.4%
10Hohai UniversityChina 52.420.0%7.7×38 +5.3%

Universities only. The score blends excellence (40%), size (30%), specialisation (10%), growth (10%), international reach (10%), 2022-now; growth compares 2018-21 with 2022-25 and counts up to +20%, since a jump from a small base is mostly noise.

Every institution in Water Quality and Pollution Assessment, country by country

Is Water Quality and Pollution Assessment research growing?

Output in 2022-2025 was 9% higher than in 2018-2021, peaking in 2022. The fastest-growing topics are Water Quality and Pollution Assessment.

still counting19801990200020102020
grewheldshrank

The same series as a ribbon: one cell per year, darker for more. The line above answers how much; this answers when.

Its share of all research

Growing output can still be a shrinking share: all of science grows. This is Water Quality and Pollution Assessment as a percentage of every work published that year, 0.043% in 2024.

still counting0.020%0.040%0.060%Water Quality and Pollution Assessment0.037% in 202519801990200020102020

Fractional works of Water Quality and Pollution Assessment over all fractional works that year. How the balance of science has shifted.

How much of it reaches the world top 10%

Year by year.

still counting5%10%15%Water Quality and Pollution Assessment11.1% in 2025200020102020

Of each year's works in it, the share that reached the world's 10% most cited for their field and year. A field is the world for its own topics, so there is no other line to hold it against.

Which topics inside it are moving

Growth and decline on one axis around a shared zero. Two lists side by side hide the thing that matters: whether the growth dwarfs the decline, or the other way round.

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