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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 04, 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 (1.131.911) 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
17,016
World Rank
52
Country Rank
1
University
Ranking Based On Selection:
1
* Total H Index Rankings
Rankings
31,626
World Rank
95
Country Rank
23
University
Ranking Based On Selection:
2
* Total H Index Rankings
Rankings
34,212
World Rank
112
Country Rank
1
University
Ranking Based On Selection:
3
Engineering & Technology / Environmental Science & Engineering
Wastewater Technology | Algal Biotechnology | Biofuels | Bioremediatio
Wastewater Technology | Algal Biotechnology | Biofuels | Bioremediatio
H-Index Metrics
-
H-Index71
-
i10 Index258
-
Citation Counts21,795
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* Total H Index Rankings
Rankings
50,520
World Rank
159
Country Rank
37
University
Ranking Based On Selection:
4
* Total H Index Rankings
Rankings
65,731
World Rank
223
Country Rank
5
University
Ranking Based On Selection:
5
Engineering & Technology / Environmental Science & Engineering
Wastewater treatment technologies | Bioreactors | Membrane technology | Water reuse | Resource recover
Wastewater treatment technologies | Bioreactors | Membrane technology | Water reuse | Resource recover
H-Index Metrics
-
H-Index57
-
i10 Index183
-
Citation Counts17,195
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* Total H Index Rankings
Rankings
71,886
World Rank
244
Country Rank
62
University
Ranking Based On Selection:
6
Engineering & Technology / Environmental Science & Engineering
vulnerability | adaptation | climate change | developmen
vulnerability | adaptation | climate change | developmen
H-Index Metrics
-
H-Index55
-
i10 Index111
-
Citation Counts13,979
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* Total H Index Rankings
Rankings
77,081
World Rank
273
Country Rank
68
University
Ranking Based On Selection:
7
Engineering & Technology / Environmental Science & Engineering
climate change mitigation | poverty | global stocktake | policy analysis | sustainable developmen
climate change mitigation | poverty | global stocktake | policy analysis | sustainable developmen
H-Index Metrics
-
H-Index54
-
i10 Index132
-
Citation Counts19,512
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* Total H Index Rankings
Rankings
84,564
World Rank
310
Country Rank
3
University
Ranking Based On Selection:
8
Engineering & Technology / Environmental Science & Engineering
Adsorption | Water treatment | nanotechnolog
Adsorption | Water treatment | nanotechnolog
H-Index Metrics
-
H-Index52
-
i10 Index104
-
Citation Counts9,133
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* Total H Index Rankings
Rankings
92,070
World Rank
338
Country Rank
83
University
Ranking Based On Selection:
9
* Total H Index Rankings
Rankings
101,784
World Rank
396
Country Rank
99
University
Ranking Based On Selection:
10
Engineering & Technology / Environmental Science & Engineering
climate change | risk | biodiversity | health | sustainabilit
climate change | risk | biodiversity | health | sustainabilit
H-Index Metrics
-
H-Index48
-
i10 Index79
-
Citation Counts21,834
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* Total H Index Rankings
Rankings
102,090
World Rank
398
Country Rank
25
University
Ranking Based On Selection:
11
Engineering & Technology / Environmental Science & Engineering
sustainability engineering | biogas | LCA | Future Technologie
sustainability engineering | biogas | LCA | Future Technologie
H-Index Metrics
-
H-Index48
-
i10 Index209
-
Citation Counts10,728
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* Total H Index Rankings
Rankings
120,678
World Rank
483
Country Rank
7
University
Ranking Based On Selection:
12
Engineering & Technology / Environmental Science & Engineering
Water Microbiology | nanotechnology | biotechnolog
Water Microbiology | nanotechnology | biotechnolog
H-Index Metrics
-
H-Index45
-
i10 Index133
-
Citation Counts6,448
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* Total H Index Rankings
Rankings
139,386
World Rank
582
Country Rank
3
University
Ranking Based On Selection:
13
Engineering & Technology / Environmental Science & Engineering
water resources analysis and modelling | water quality analysis and remediation | surface and groundwater hydrolog
water resources analysis and modelling | water quality analysis and remediation | surface and groundwater hydrolog
H-Index Metrics
-
H-Index42
-
i10 Index104
-
Citation Counts6,467
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* Total H Index Rankings
Rankings
146,558
World Rank
615
Country Rank
16
University
Ranking Based On Selection:
14
Engineering & Technology / Environmental Science & Engineering
Climate Change | Loss and Damage | Disaster Risk Reduction | SDGs | Coastal Resilience and Livelihood
Climate Change | Loss and Damage | Disaster Risk Reduction | SDGs | Coastal Resilience and Livelihood
H-Index Metrics
-
H-Index41
-
i10 Index132
-
Citation Counts7,094
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* Total H Index Rankings
Rankings
147,731
World Rank
622
Country Rank
9
University
Ranking Based On Selection:
15
Engineering & Technology / Environmental Science & Engineering
Algal Biofuels | Biotechnology | Nutrient recover
Algal Biofuels | Biotechnology | Nutrient recover
H-Index Metrics
-
H-Index41
-
i10 Index52
-
Citation Counts8,264
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* Total H Index Rankings
Rankings
149,558
World Rank
639
Country Rank
80
University
Ranking Based On Selection:
16
Engineering & Technology / Environmental Science & Engineering
High Voltage Engineering | Lightning | EMI/EMC | Environmental Science | Extreme Natural Event
High Voltage Engineering | Lightning | EMI/EMC | Environmental Science | Extreme Natural Event
H-Index Metrics
-
H-Index41
-
i10 Index141
-
Citation Counts9,674
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* Total H Index Rankings
Rankings
159,166
World Rank
686
Country Rank
14
University
Ranking Based On Selection:
17
Engineering & Technology / Environmental Science & Engineering
Environmental Education | Social Learning | Transformative Learning | Critical theor
Environmental Education | Social Learning | Transformative Learning | Critical theor
H-Index Metrics
-
H-Index40
-
i10 Index103
-
Citation Counts5,483
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* Total H Index Rankings
Rankings
164,066
World Rank
709
Country Rank
11
University
Ranking Based On Selection:
18
* Total H Index Rankings
Rankings
174,066
World Rank
758
Country Rank
65
University
Ranking Based On Selection:
19
Engineering & Technology / Environmental Science & Engineering
climate | ecosystems | sustainable agriculture | Afric
climate | ecosystems | sustainable agriculture | Afric
H-Index Metrics
-
H-Index38
-
i10 Index77
-
Citation Counts9,604
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* Total H Index Rankings
Rankings
176,962
World Rank
775
Country Rank
68
University
Ranking Based On Selection:
20
* Total H Index Rankings
Rankings
184,697
World Rank
808
Country Rank
33
University
Ranking Based On Selection:
21
Engineering & Technology / Environmental Science & Engineering
Environmental Management and Assessmen
Environmental Management and Assessmen
H-Index Metrics
-
H-Index37
-
i10 Index72
-
Citation Counts4,530
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* Total H Index Rankings
Rankings
186,699
World Rank
823
Country Rank
73
University
Ranking Based On Selection:
22
Engineering & Technology / Environmental Science & Engineering
Ecology | Climate Change | Plant-plant interactions | Ecosystem engineers | Species distribution
Ecology | Climate Change | Plant-plant interactions | Ecosystem engineers | Species distribution
H-Index Metrics
-
H-Index37
-
i10 Index73
-
Citation Counts7,017
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* Total H Index Rankings
Rankings
192,080
World Rank
858
Country Rank
6
University
Ranking Based On Selection:
23
Engineering & Technology / Environmental Science & Engineering
Water Resource Management | Environmental Sciences | Environmental Engineering and Public Healt
Water Resource Management | Environmental Sciences | Environmental Engineering and Public Healt
H-Index Metrics
-
H-Index36
-
i10 Index73
-
Citation Counts5,167
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* Total H Index Rankings
Rankings
193,039
World Rank
865
Country Rank
10
University
Ranking Based On Selection:
24
* Total H Index Rankings
Rankings
197,889
World Rank
894
Country Rank
72
University
Ranking Based On Selection:
25
Engineering & Technology / Environmental Science & Engineering
Biodiversity measurement | Biogeographic regionalisation | Coleoptera | Phylogenetic diversit
Biodiversity measurement | Biogeographic regionalisation | Coleoptera | Phylogenetic diversit
H-Index Metrics
-
H-Index36
-
i10 Index62
-
Citation Counts6,793
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