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World Scientist and University Rankings 2026
Engineering & Technology / Environmental Science & Engineering 19.331 Scientists Subject Rankings
The AD Scientific Index (Alper-Doger Scientific Index) provides the most comprehensive analysis across 13 main fields and 211 sub-branches at global, national, and regional levels. These analyses are based on indicators such as the H-index, i10-index, and citation count, including their values from the last 5 years. As of Sep 02, 2025, the rankings are determined according to the Total H Index. BETA VERSION: The subject field rankings for the world, regions, countries, and universities are currently in their Beta phase. This is due to the exclusion of (1.122.044) scientists categorized under ‘Others’, whose profiles have yet to be determined, edited, or classified. As updates are made to these fields, the rankings will be adjusted accordingly. Note: Please keep this in mind while reviewing the rankings. For further details, explore our [University Subject Rankings].
* Total H Index Rankings
Rankings
507
World Rank
176
Country Rank
3
University
Ranking Based On Selection:
1
Engineering & Technology / Environmental Science & Engineering
environmental engineering | membrane separations | environmental nanotechnology | desalination | wate
environmental engineering | membrane separations | environmental nanotechnology | desalination | wate
H-Index Metrics
-
H-Index215
-
i10 Index580
-
Citation Counts168,703
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* Total H Index Rankings
Rankings
909
World Rank
64
Country Rank
1
University
Ranking Based On Selection:
2
Engineering & Technology / Environmental Science & Engineering
Global change | soils | carbon | climate change | mitigatio
Global change | soils | carbon | climate change | mitigatio
H-Index Metrics
-
H-Index184
-
i10 Index874
-
Citation Counts145,906
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* Total H Index Rankings
Rankings
999
World Rank
72
Country Rank
1
University
Ranking Based On Selection:
3
Engineering & Technology / Environmental Science & Engineering
Polymer nanocomposites | Conducting Polymers | Sustainability | Environmental Engineering | Electronic
Polymer nanocomposites | Conducting Polymers | Sustainability | Environmental Engineering | Electronic
H-Index Metrics
-
H-Index179
-
i10 Index1,029
-
Citation Counts110,716
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* Total H Index Rankings
Rankings
1,026
World Rank
398
Country Rank
13
University
Ranking Based On Selection:
4
Engineering & Technology / Environmental Science & Engineering
biogeochemistry | ecology | environmental science | climate change | ecohydrolog
biogeochemistry | ecology | environmental science | climate change | ecohydrolog
H-Index Metrics
-
H-Index178
-
i10 Index507
-
Citation Counts177,606
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* Total H Index Rankings
Rankings
1,120
World Rank
83
Country Rank
1
University
Ranking Based On Selection:
5
Engineering & Technology / Environmental Science & Engineering
Climate | Climate Change | Paleoclimat
Climate | Climate Change | Paleoclimat
H-Index Metrics
-
H-Index174
-
i10 Index586
-
Citation Counts168,532
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* Total H Index Rankings
Rankings
1,166
World Rank
464
Country Rank
1
University
Ranking Based On Selection:
6
Engineering & Technology / Environmental Science & Engineering
Microbial fuel cells | microbial electrolysis cells | thermal batteries | desalination | water electrolyzer
Microbial fuel cells | microbial electrolysis cells | thermal batteries | desalination | water electrolyzer
H-Index Metrics
-
H-Index172
-
i10 Index553
-
Citation Counts125,037
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* Total H Index Rankings
Rankings
1,220
World Rank
25
Country Rank
1
University
Ranking Based On Selection:
7
Engineering & Technology / Environmental Science & Engineering
integrated assessment | climate change | environmental science | global change | sustainable developmen
integrated assessment | climate change | environmental science | global change | sustainable developmen
H-Index Metrics
-
H-Index169
-
i10 Index588
-
Citation Counts198,672
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* Total H Index Rankings
Rankings
1,230
World Rank
499
Country Rank
18
University
Ranking Based On Selection:
8
Engineering & Technology / Environmental Science & Engineering
climate change | ecology | carbon cycle | leaf nitroge
climate change | ecology | carbon cycle | leaf nitroge
H-Index Metrics
-
H-Index169
-
i10 Index392
-
Citation Counts172,411
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* Total H Index Rankings
Rankings
1,251
World Rank
29
Country Rank
1
University
Ranking Based On Selection:
9
Engineering & Technology / Environmental Science & Engineering
Environmental Soil Science & Biogeochemistr
Environmental Soil Science & Biogeochemistr
H-Index Metrics
-
H-Index168
-
i10 Index778
-
Citation Counts104,756
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* Total H Index Rankings
Rankings
1,475
World Rank
606
Country Rank
6
University
Ranking Based On Selection:
10
Engineering & Technology / Environmental Science & Engineering
Environmental & soil chemistry | adsorption | nanoparticles | microplastics | food safet
Environmental & soil chemistry | adsorption | nanoparticles | microplastics | food safet
H-Index Metrics
-
H-Index161
-
i10 Index916
-
Citation Counts108,792
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* Total H Index Rankings
Rankings
1,700
World Rank
54
Country Rank
7
University
Ranking Based On Selection:
11
Engineering & Technology / Environmental Science & Engineering
air pollution | environmental health | environmental epidemiology | built environmen
air pollution | environmental health | environmental epidemiology | built environmen
H-Index Metrics
-
H-Index155
-
i10 Index459
-
Citation Counts191,202
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* Total H Index Rankings
Rankings
1,766
World Rank
140
Country Rank
1
University
Ranking Based On Selection:
12
Engineering & Technology / Environmental Science & Engineering
Environmental behaviour and effects of organic contaminants | passive sampling technique
Environmental behaviour and effects of organic contaminants | passive sampling technique
H-Index Metrics
-
H-Index154
-
i10 Index837
-
Citation Counts95,043
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* Total H Index Rankings
Rankings
1,989
World Rank
161
Country Rank
2
University
Ranking Based On Selection:
13
* Total H Index Rankings
Rankings
2,066
World Rank
64
Country Rank
1
University
Ranking Based On Selection:
14
Engineering & Technology / Environmental Science & Engineering
environmental science | pollution | risk and remediatio
environmental science | pollution | risk and remediatio
H-Index Metrics
-
H-Index148
-
i10 Index945
-
Citation Counts92,084
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* Total H Index Rankings
Rankings
2,068
World Rank
42
Country Rank
7
University
Ranking Based On Selection:
15
Engineering & Technology / Environmental Science & Engineering
land use change | global environmental change | geography | land use | land cove
land use change | global environmental change | geography | land use | land cove
H-Index Metrics
-
H-Index148
-
i10 Index476
-
Citation Counts74,787
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* Total H Index Rankings
Rankings
2,120
World Rank
39
Country Rank
8
University
Ranking Based On Selection:
16
Engineering & Technology / Environmental Science & Engineering
climate change | land-climate dynamics | climate extreme
climate change | land-climate dynamics | climate extreme
H-Index Metrics
-
H-Index147
-
i10 Index355
-
Citation Counts108,088
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* Total H Index Rankings
Rankings
2,340
World Rank
4
Country Rank
1
University
Ranking Based On Selection:
17
Engineering & Technology / Environmental Science & Engineering
Environmental Engineering | Green Chemistry | Chemical Engineering | Water Treatment | Environmenta
Environmental Engineering | Green Chemistry | Chemical Engineering | Water Treatment | Environmenta
H-Index Metrics
-
H-Index144
-
i10 Index1,073
-
Citation Counts101,742
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* Total H Index Rankings
Rankings
2,397
World Rank
1,048
Country Rank
7
University
Ranking Based On Selection:
18
* Total H Index Rankings
Rankings
2,488
World Rank
78
Country Rank
2
University
Ranking Based On Selection:
19
Engineering & Technology / Environmental Science & Engineering
Water Treatment Processes | Environmental Nanotechnology | Advanced Oxidation | Membrane Technolog
Water Treatment Processes | Environmental Nanotechnology | Advanced Oxidation | Membrane Technolog
H-Index Metrics
-
H-Index142
-
i10 Index861
-
Citation Counts78,533
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* Total H Index Rankings
Rankings
2,764
World Rank
93
Country Rank
11
University
Ranking Based On Selection:
20
Engineering & Technology / Environmental Science & Engineering
Climate change | Tropical marine biology | Coral reef
Climate change | Tropical marine biology | Coral reef
H-Index Metrics
-
H-Index139
-
i10 Index398
-
Citation Counts108,053
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* Total H Index Rankings
Rankings
2,813
World Rank
95
Country Rank
3
University
Ranking Based On Selection:
21
* Total H Index Rankings
Rankings
2,925
World Rank
243
Country Rank
1
University
Ranking Based On Selection:
22
* Total H Index Rankings
Rankings
2,926
World Rank
1
Country Rank
1
University
Ranking Based On Selection:
23
Engineering & Technology / Environmental Science & Engineering
Water Treatment | Waste to Value-added Product
Water Treatment | Waste to Value-added Product
H-Index Metrics
-
H-Index137
-
i10 Index551
-
Citation Counts100,518
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* Total H Index Rankings
Rankings
3,040
World Rank
1,352
Country Rank
16
University
Ranking Based On Selection:
24
Engineering & Technology / Environmental Science & Engineering
environmental chemistry | atmospheric chemistry | environmental engineerin
environmental chemistry | atmospheric chemistry | environmental engineerin
H-Index Metrics
-
H-Index136
-
i10 Index441
-
Citation Counts86,618
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* Total H Index Rankings
Rankings
3,081
World Rank
106
Country Rank
12
University
Ranking Based On Selection:
25
Engineering & Technology / Environmental Science & Engineering
Urban Water Management | Environmental Biotechnolog
Urban Water Management | Environmental Biotechnolog
H-Index Metrics
-
H-Index135
-
i10 Index591
-
Citation Counts61,169
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