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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 Jan 02, 2026, 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 (1.131.752) 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
186,383
World Rank
37
Country Rank
6
University
Ranking Based On Selection:
1
Engineering & Technology / Environmental Science & Engineering
Hydraulics | Solid Waste | Environmental Health | Occupational Health | Environmental Engineerin
Hydraulics | Solid Waste | Environmental Health | Occupational Health | Environmental Engineerin
H-Index Metrics
-
H-Index37
-
i10 Index86
-
Citation Counts4,939
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* Total H Index Rankings
Rankings
238,528
World Rank
45
Country Rank
6
University
Ranking Based On Selection:
2
* Total H Index Rankings
Rankings
523,858
World Rank
132
Country Rank
13
University
Ranking Based On Selection:
3
Engineering & Technology / Environmental Science & Engineering
Wastewater | Drinking water | Environmental Science
Wastewater | Drinking water | Environmental Science
H-Index Metrics
-
H-Index20
-
i10 Index30
-
Citation Counts4,988
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* Total H Index Rankings
Rankings
524,027
World Rank
133
Country Rank
3
University
Ranking Based On Selection:
4
Engineering & Technology / Environmental Science & Engineering
Environmental Technology | Chemical Engineering | Education Plannin
Environmental Technology | Chemical Engineering | Education Plannin
H-Index Metrics
-
H-Index20
-
i10 Index30
-
Citation Counts1,146
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* Total H Index Rankings
Rankings
556,605
World Rank
146
Country Rank
19
University
Ranking Based On Selection:
5
Engineering & Technology / Environmental Science & Engineering
water resources management | groundwater | environment
water resources management | groundwater | environment
H-Index Metrics
-
H-Index19
-
i10 Index27
-
Citation Counts1,250
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* Total H Index Rankings
Rankings
594,751
World Rank
169
Country Rank
21
University
Ranking Based On Selection:
6
* Total H Index Rankings
Rankings
630,212
World Rank
188
Country Rank
24
University
Ranking Based On Selection:
7
* Total H Index Rankings
Rankings
636,004
World Rank
191
Country Rank
26
University
Ranking Based On Selection:
8
Engineering & Technology / Environmental Science & Engineering
Aquaculture | heavy metals in the Environmen
Aquaculture | heavy metals in the Environmen
H-Index Metrics
-
H-Index17
-
i10 Index25
-
Citation Counts844
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* Total H Index Rankings
Rankings
643,271
World Rank
195
Country Rank
21
University
Ranking Based On Selection:
9
Engineering & Technology / Environmental Science & Engineering
environmental pollution | toxicology & healt
environmental pollution | toxicology & healt
H-Index Metrics
-
H-Index17
-
i10 Index21
-
Citation Counts1,323
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* Total H Index Rankings
Rankings
669,431
World Rank
214
Country Rank
66
University
Ranking Based On Selection:
10
Engineering & Technology / Environmental Science & Engineering
Hydrology | Rainfall-runoff modeling | Climate change modeling and assessment | GIS applications t
Hydrology | Rainfall-runoff modeling | Climate change modeling and assessment | GIS applications t
H-Index Metrics
-
H-Index16
-
i10 Index23
-
Citation Counts925
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* Total H Index Rankings
Rankings
671,703
World Rank
218
Country Rank
13
University
Ranking Based On Selection:
11
Engineering & Technology / Environmental Science & Engineering
Bioremediation of pollutants | wastewater treatment | solid waste managemen
Bioremediation of pollutants | wastewater treatment | solid waste managemen
H-Index Metrics
-
H-Index16
-
i10 Index19
-
Citation Counts1,618
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* Total H Index Rankings
Rankings
683,526
World Rank
226
Country Rank
25
University
Ranking Based On Selection:
12
Engineering & Technology / Environmental Science & Engineering
WW Engineering/Recycling | Bioprocess Engineering | Enviromental Engineering | WASH | Desalinatio
WW Engineering/Recycling | Bioprocess Engineering | Enviromental Engineering | WASH | Desalinatio
H-Index Metrics
-
H-Index16
-
i10 Index30
-
Citation Counts1,091
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* Total H Index Rankings
Rankings
686,157
World Rank
227
Country Rank
26
University
Ranking Based On Selection:
13
Engineering & Technology / Environmental Science & Engineering
Water Resources Management and Cliimate Chang
Water Resources Management and Cliimate Chang
H-Index Metrics
-
H-Index16
-
i10 Index18
-
Citation Counts921
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* Total H Index Rankings
Rankings
827,908
World Rank
313
Country Rank
2
University
Ranking Based On Selection:
14
* Total H Index Rankings
Rankings
838,627
World Rank
326
Country Rank
38
University
Ranking Based On Selection:
15
* Total H Index Rankings
Rankings
840,079
World Rank
328
Country Rank
96
University
Ranking Based On Selection:
16
* Total H Index Rankings
Rankings
1,016,285
World Rank
457
Country Rank
3
University
Ranking Based On Selection:
17
Engineering & Technology / Environmental Science & Engineering
Environmental Chemistry | Water Purification Technologies | Renewable Energy Technologies | polymer
Environmental Chemistry | Water Purification Technologies | Renewable Energy Technologies | polymer
H-Index Metrics
-
H-Index10
-
i10 Index10
-
Citation Counts521
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* Total H Index Rankings
Rankings
1,082,935
World Rank
519
Country Rank
50
University
Ranking Based On Selection:
18
* Total H Index Rankings
Rankings
1,091,827
World Rank
529
Country Rank
55
University
Ranking Based On Selection:
19
Engineering & Technology / Environmental Science & Engineering
Environment Engineering and Science | Water | Pollution | Environmental Education and Awarnes
Environment Engineering and Science | Water | Pollution | Environmental Education and Awarnes
H-Index Metrics
-
H-Index9
-
i10 Index9
-
Citation Counts557
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* Total H Index Rankings
Rankings
1,308,822
World Rank
719
Country Rank
45
University
Ranking Based On Selection:
20
Engineering & Technology / Environmental Science & Engineering
Mechanical and Environmental Engineerin
Mechanical and Environmental Engineerin
H-Index Metrics
-
H-Index8
-
i10 Index6
-
Citation Counts194
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* Total H Index Rankings
Rankings
1,337,324
World Rank
756
Country Rank
1
University
Ranking Based On Selection:
21
Engineering & Technology / Environmental Science & Engineering
Waste management | wastewater treatment and environmental engineerin
Waste management | wastewater treatment and environmental engineerin
H-Index Metrics
-
H-Index7
-
i10 Index6
-
Citation Counts395
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* Total H Index Rankings
Rankings
1,409,051
World Rank
820
Country Rank
10
University
Ranking Based On Selection:
22
Engineering & Technology / Environmental Science & Engineering
Environmental and Water Resources Engineerin
Environmental and Water Resources Engineerin
H-Index Metrics
-
H-Index7
-
i10 Index5
-
Citation Counts197
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* Total H Index Rankings
Rankings
1,585,716
World Rank
1,015
Country Rank
74
University
Ranking Based On Selection:
23
Engineering & Technology / Environmental Science & Engineering
Environmental Remote Sensing | Applied GIS | Geomorphology | Coastal Assessment | Image Classificatio
Environmental Remote Sensing | Applied GIS | Geomorphology | Coastal Assessment | Image Classificatio
H-Index Metrics
-
H-Index6
-
i10 Index3
-
Citation Counts122
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* Total H Index Rankings
Rankings
1,634,603
World Rank
1,075
Country Rank
80
University
Ranking Based On Selection:
24
Engineering & Technology / Environmental Science & Engineering
Environmental and groundwater pollution and hydrochemistr
Environmental and groundwater pollution and hydrochemistr
H-Index Metrics
-
H-Index5
-
i10 Index5
-
Citation Counts229
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* Total H Index Rankings
Rankings
1,866,590
World Rank
1,345
Country Rank
126
University
Ranking Based On Selection:
25
Engineering & Technology / Environmental Science & Engineering
GIS | Remote Sensing | Climate Change | hazard & risk analysis | Hydrology/Hydraulics Modelling
GIS | Remote Sensing | Climate Change | hazard & risk analysis | Hydrology/Hydraulics Modelling
H-Index Metrics
-
H-Index4
-
i10 Index3
-
Citation Counts77
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