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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 (1.131.752) 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
2,184
World Rank
6
Country Rank
1
University
Ranking Based On Selection:
1
Engineering & Technology / Environmental Science & Engineering
Chemistry | Environmental Engineering | Green Chemistry | Chemical Engineering | Water Treatmen
Chemistry | Environmental Engineering | Green Chemistry | Chemical Engineering | Water Treatmen
H-Index Metrics
-
H-Index149
-
i10 Index1,114
-
Citation Counts108,276
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* Total H Index Rankings
Rankings
2,878
World Rank
4
Country Rank
3
University
Ranking Based On Selection:
2
Engineering & Technology / Environmental Science & Engineering
Water Treatment | Waste to Value-added Product
Water Treatment | Waste to Value-added Product
H-Index Metrics
-
H-Index140
-
i10 Index567
-
Citation Counts104,009
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* Total H Index Rankings
Rankings
24,790
World Rank
18
Country Rank
5
University
Ranking Based On Selection:
3
Engineering & Technology / Environmental Science & Engineering
Membrane technology for water and wastewater treatmen
Membrane technology for water and wastewater treatmen
H-Index Metrics
-
H-Index79
-
i10 Index180
-
Citation Counts25,474
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* Total H Index Rankings
Rankings
27,495
World Rank
87
Country Rank
36
University
Ranking Based On Selection:
4
Engineering & Technology / Environmental Science & Engineering
Water desalination | Renewable energy | Desalination economics | Innovative desalination technologie
Water desalination | Renewable energy | Desalination economics | Innovative desalination technologie
H-Index Metrics
-
H-Index76
-
i10 Index231
-
Citation Counts20,159
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* Total H Index Rankings
Rankings
46,880
World Rank
172
Country Rank
22
University
Ranking Based On Selection:
5
* Total H Index Rankings
Rankings
50,253
World Rank
17
Country Rank
12
University
Ranking Based On Selection:
6
Engineering & Technology / Environmental Science & Engineering
Waste management | Water resources management | Air pollution control | Climate change and sustainable development | Environmental
Waste management | Water resources management | Air pollution control | Climate change and sustainable development | Environmental
H-Index Metrics
-
H-Index63
-
i10 Index207
-
Citation Counts13,478
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* Total H Index Rankings
Rankings
53,804
World Rank
49
Country Rank
21
University
Ranking Based On Selection:
7
Engineering & Technology / Environmental Science & Engineering
Analytical and environmental chemistry | Environmental Remediation | Validation method in analytical chemistry | Remediation | Adso
Analytical and environmental chemistry | Environmental Remediation | Validation method in analytical chemistry | Remediation | Adso
H-Index Metrics
-
H-Index61
-
i10 Index193
-
Citation Counts18,779
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* Total H Index Rankings
Rankings
61,888
World Rank
60
Country Rank
28
University
Ranking Based On Selection:
8
Engineering & Technology / Environmental Science & Engineering
Climate change ecology | Climate change vulnerability | Vegetation Science | Soil biodiversity | ITE
Climate change ecology | Climate change vulnerability | Vegetation Science | Soil biodiversity | ITE
H-Index Metrics
-
H-Index58
-
i10 Index152
-
Citation Counts15,953
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* Total H Index Rankings
Rankings
65,072
World Rank
261
Country Rank
31
University
Ranking Based On Selection:
9
Engineering & Technology / Environmental Science & Engineering
Climate | Climate Change | Impact of Climate Change in water resources and environment | climate extreme
Climate | Climate Change | Impact of Climate Change in water resources and environment | climate extreme
H-Index Metrics
-
H-Index57
-
i10 Index168
-
Citation Counts12,128
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* Total H Index Rankings
Rankings
71,751
World Rank
298
Country Rank
38
University
Ranking Based On Selection:
10
Engineering & Technology / Environmental Science & Engineering
Electrochemistry | Physical Chemistry | Nanotechnology | Renewable Energy | Environmental Scienc
Electrochemistry | Physical Chemistry | Nanotechnology | Renewable Energy | Environmental Scienc
H-Index Metrics
-
H-Index55
-
i10 Index146
-
Citation Counts13,003
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* Total H Index Rankings
Rankings
71,863
World Rank
302
Country Rank
92
University
Ranking Based On Selection:
11
Engineering & Technology / Environmental Science & Engineering
Environmental Biotechnology | Microbial Electrochemical Systems | Aerobic Granular Sludge | Anammox | Resource Recover
Environmental Biotechnology | Microbial Electrochemical Systems | Aerobic Granular Sludge | Anammox | Resource Recover
H-Index Metrics
-
H-Index55
-
i10 Index123
-
Citation Counts10,665
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* Total H Index Rankings
Rankings
74,999
World Rank
75
Country Rank
20
University
Ranking Based On Selection:
12
Engineering & Technology / Environmental Science & Engineering
Sustainability | Built Environment | Life-Cycle Assessment | Climate Change | Resilient Infrastructur
Sustainability | Built Environment | Life-Cycle Assessment | Climate Change | Resilient Infrastructur
H-Index Metrics
-
H-Index54
-
i10 Index151
-
Citation Counts10,146
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* Total H Index Rankings
Rankings
75,020
World Rank
76
Country Rank
1
University
Ranking Based On Selection:
13
Engineering & Technology / Environmental Science & Engineering
Desalination | water treatment | environmental engineerin
Desalination | water treatment | environmental engineerin
H-Index Metrics
-
H-Index54
-
i10 Index91
-
Citation Counts11,404
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* Total H Index Rankings
Rankings
83,056
World Rank
356
Country Rank
1
University
Ranking Based On Selection:
14
Engineering & Technology / Environmental Science & Engineering
Energy | Sustainability | Integrated Assessment | Climate Change Mitigation | Water-Energy-Land Nexu
Energy | Sustainability | Integrated Assessment | Climate Change Mitigation | Water-Energy-Land Nexu
H-Index Metrics
-
H-Index52
-
i10 Index105
-
Citation Counts9,792
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* Total H Index Rankings
Rankings
83,360
World Rank
361
Country Rank
46
University
Ranking Based On Selection:
15
Engineering & Technology / Environmental Science & Engineering
Antimicrobial Agents | Nanoformulation | Silver nanoparticles | Phosphate solubilization | Biofil
Antimicrobial Agents | Nanoformulation | Silver nanoparticles | Phosphate solubilization | Biofil
H-Index Metrics
-
H-Index52
-
i10 Index98
-
Citation Counts14,329
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* Total H Index Rankings
Rankings
85,839
World Rank
20
Country Rank
1
University
Ranking Based On Selection:
16
Engineering & Technology / Environmental Science & Engineering
Génie de l'Environnement | Génie des Procédés | Chimie de l'Environnemen
Génie de l'Environnement | Génie des Procédés | Chimie de l'Environnemen
H-Index Metrics
-
H-Index52
-
i10 Index110
-
Citation Counts8,134
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* Total H Index Rankings
Rankings
87,177
World Rank
119
Country Rank
39
University
Ranking Based On Selection:
17
Engineering & Technology / Environmental Science & Engineering
Membranes | Wastewater treatment | Environmental science | Food Packaging | Waste to Energ
Membranes | Wastewater treatment | Environmental science | Food Packaging | Waste to Energ
H-Index Metrics
-
H-Index51
-
i10 Index108
-
Citation Counts9,849
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* Total H Index Rankings
Rankings
87,312
World Rank
2
Country Rank
1
University
Ranking Based On Selection:
18
Engineering & Technology / Environmental Science & Engineering
DecentalizedAI RAG LLM | Data-sharing Industry4.0/5.0 | SemCom HoloCom | Maverse | D
DecentalizedAI RAG LLM | Data-sharing Industry4.0/5.0 | SemCom HoloCom | Maverse | D
H-Index Metrics
-
H-Index51
-
i10 Index117
-
Citation Counts7,985
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* Total H Index Rankings
Rankings
89,918
World Rank
93
Country Rank
23
University
Ranking Based On Selection:
19
* Total H Index Rankings
Rankings
92,494
World Rank
401
Country Rank
108
University
Ranking Based On Selection:
20
Engineering & Technology / Environmental Science & Engineering
Applied environmental microbiology | water quality | water reuse | antibiotic resistance | anaerobic processe
Applied environmental microbiology | water quality | water reuse | antibiotic resistance | anaerobic processe
H-Index Metrics
-
H-Index50
-
i10 Index116
-
Citation Counts6,994
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* Total H Index Rankings
Rankings
93,486
World Rank
166
Country Rank
6
University
Ranking Based On Selection:
21
Engineering & Technology / Environmental Science & Engineering
Environmental Science | Reproductive Toxicology | Endocrine Disruption | Hepatotoxicity | Drug Toxicit
Environmental Science | Reproductive Toxicology | Endocrine Disruption | Hepatotoxicity | Drug Toxicit
H-Index Metrics
-
H-Index50
-
i10 Index100
-
Citation Counts11,246
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* Total H Index Rankings
Rankings
101,881
World Rank
448
Country Rank
56
University
Ranking Based On Selection:
22
* Total H Index Rankings
Rankings
103,148
World Rank
467
Country Rank
59
University
Ranking Based On Selection:
23
Engineering & Technology / Environmental Science & Engineering
Climate Change | Climate Modelling | Radar and Satellite Meteorology | Monsoon Meteorolog
Climate Change | Climate Modelling | Radar and Satellite Meteorology | Monsoon Meteorolog
H-Index Metrics
-
H-Index48
-
i10 Index160
-
Citation Counts9,696
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* Total H Index Rankings
Rankings
108,859
World Rank
43
Country Rank
30
University
Ranking Based On Selection:
24
Engineering & Technology / Environmental Science & Engineering
Conservation of energy | thermal comfort and indoor air qualit
Conservation of energy | thermal comfort and indoor air qualit
H-Index Metrics
-
H-Index47
-
i10 Index167
-
Citation Counts7,310
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* Total H Index Rankings
Rankings
112,558
World Rank
121
Country Rank
57
University
Ranking Based On Selection:
25
Engineering & Technology / Environmental Science & Engineering
CO2 capture and conversion | Water/wastewater treatment | Climate chang
CO2 capture and conversion | Water/wastewater treatment | Climate chang
H-Index Metrics
-
H-Index46
-
i10 Index97
-
Citation Counts7,873
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