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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
97,872
World Rank
70
Country Rank
5
University
Ranking Based On Selection:
1
Engineering & Technology / Environmental Science & Engineering
Social-ecological systems | Conservation biology | Amphibians | Wood-pastures | Transdisciplinar
Social-ecological systems | Conservation biology | Amphibians | Wood-pastures | Transdisciplinar
H-Index Metrics
-
H-Index49
-
i10 Index109
-
Citation Counts8,167
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* Total H Index Rankings
Rankings
126,899
World Rank
106
Country Rank
2
University
Ranking Based On Selection:
2
Engineering & Technology / Environmental Science & Engineering
Water&Wastewater treatment | Integrated environmental management | Sustainability assessments | Environmental Engineerin
Water&Wastewater treatment | Integrated environmental management | Sustainability assessments | Environmental Engineerin
H-Index Metrics
-
H-Index44
-
i10 Index107
-
Citation Counts6,934
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* Total H Index Rankings
Rankings
355,896
World Rank
513
Country Rank
40
University
Ranking Based On Selection:
3
Engineering & Technology / Environmental Science & Engineering
Membranes | Separation Science | Analytical Chemistry | Environmental Engineering | Methods and Techniques of Remediatio
Membranes | Separation Science | Analytical Chemistry | Environmental Engineering | Methods and Techniques of Remediatio
H-Index Metrics
-
H-Index26
-
i10 Index76
-
Citation Counts2,675
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* Total H Index Rankings
Rankings
399,848
World Rank
625
Country Rank
17
University
Ranking Based On Selection:
4
Engineering & Technology / Environmental Science & Engineering
environmental engineering and sciences | chemical engineering | environmental chemistry | water&waste water treatment | energy-envi
environmental engineering and sciences | chemical engineering | environmental chemistry | water&waste water treatment | energy-envi
H-Index Metrics
-
H-Index24
-
i10 Index59
-
Citation Counts4,019
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* Total H Index Rankings
Rankings
417,664
World Rank
680
Country Rank
95
University
Ranking Based On Selection:
5
Engineering & Technology / Environmental Science & Engineering
environmental policy and legislation | sustainable developmen
environmental policy and legislation | sustainable developmen
H-Index Metrics
-
H-Index23
-
i10 Index57
-
Citation Counts2,399
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* Total H Index Rankings
Rankings
441,800
World Rank
757
Country Rank
1
University
Ranking Based On Selection:
6
Engineering & Technology / Environmental Science & Engineering
Environmental Economics | Climate Change | Sustainable Development | Carbon Accountin
Environmental Economics | Climate Change | Sustainable Development | Carbon Accountin
H-Index Metrics
-
H-Index22
-
i10 Index30
-
Citation Counts1,580
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* Total H Index Rankings
Rankings
458,206
World Rank
808
Country Rank
38
University
Ranking Based On Selection:
7
Engineering & Technology / Environmental Science & Engineering
Physical Chemistry | Advanced Polymer Structures | Catalysis | Environmental Engineerin
Physical Chemistry | Advanced Polymer Structures | Catalysis | Environmental Engineerin
H-Index Metrics
-
H-Index22
-
i10 Index48
-
Citation Counts2,197
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* Total H Index Rankings
Rankings
479,837
World Rank
875
Country Rank
12
University
Ranking Based On Selection:
8
Engineering & Technology / Environmental Science & Engineering
environmental science | life cycle assessment | multicriteria evaluatio
environmental science | life cycle assessment | multicriteria evaluatio
H-Index Metrics
-
H-Index21
-
i10 Index34
-
Citation Counts1,751
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* Total H Index Rankings
Rankings
484,541
World Rank
893
Country Rank
39
University
Ranking Based On Selection:
9
* Total H Index Rankings
Rankings
486,540
World Rank
902
Country Rank
2
University
Ranking Based On Selection:
10
Engineering & Technology / Environmental Science & Engineering
environmental engineering | chemical engineering | food engineerin
environmental engineering | chemical engineering | food engineerin
H-Index Metrics
-
H-Index21
-
i10 Index40
-
Citation Counts1,378
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* Total H Index Rankings
Rankings
490,085
World Rank
911
Country Rank
10
University
Ranking Based On Selection:
11
Engineering & Technology / Environmental Science & Engineering
Agri-Environment | Environmental Monitoring | Air pollutio
Agri-Environment | Environmental Monitoring | Air pollutio
H-Index Metrics
-
H-Index21
-
i10 Index36
-
Citation Counts1,343
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* Total H Index Rankings
Rankings
548,713
World Rank
1,079
Country Rank
45
University
Ranking Based On Selection:
12
Engineering & Technology / Environmental Science & Engineering
Environmental Sciences | Ecology | Water Resources | Multidisciplinar
Environmental Sciences | Ecology | Water Resources | Multidisciplinar
H-Index Metrics
-
H-Index19
-
i10 Index24
-
Citation Counts3,913
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* Total H Index Rankings
Rankings
562,264
World Rank
1,129
Country Rank
85
University
Ranking Based On Selection:
13
Engineering & Technology / Environmental Science & Engineering
Waste management | Energy Engineering | Environmental Engineerin
Waste management | Energy Engineering | Environmental Engineerin
H-Index Metrics
-
H-Index19
-
i10 Index30
-
Citation Counts1,313
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* Total H Index Rankings
Rankings
659,220
World Rank
1,529
Country Rank
70
University
Ranking Based On Selection:
14
Engineering & Technology / Environmental Science & Engineering
Environmental science | Biotechnologies | Biogeochemistry | XAS | Nanoscienc
Environmental science | Biotechnologies | Biogeochemistry | XAS | Nanoscienc
H-Index Metrics
-
H-Index16
-
i10 Index18
-
Citation Counts1,191
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* Total H Index Rankings
Rankings
716,431
World Rank
1,840
Country Rank
47
University
Ranking Based On Selection:
15
Engineering & Technology / Environmental Science & Engineering
GIS | Remote Sensing | Landscape change | Land use/cover change
GIS | Remote Sensing | Landscape change | Land use/cover change
H-Index Metrics
-
H-Index15
-
i10 Index24
-
Citation Counts748
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* Total H Index Rankings
Rankings
725,567
World Rank
1,902
Country Rank
97
University
Ranking Based On Selection:
16
Engineering & Technology / Environmental Science & Engineering
Environmental Science | Soil pollution | Mineralgy | Environmental Geochemistry | Ore deposit
Environmental Science | Soil pollution | Mineralgy | Environmental Geochemistry | Ore deposit
H-Index Metrics
-
H-Index15
-
i10 Index19
-
Citation Counts837
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* Total H Index Rankings
Rankings
752,163
World Rank
2,050
Country Rank
145
University
Ranking Based On Selection:
17
Engineering & Technology / Environmental Science & Engineering
Pollution | Risk Assessment | Contaminated Sites | Air pollution | Academy of Romanian Scientist
Pollution | Risk Assessment | Contaminated Sites | Air pollution | Academy of Romanian Scientist
H-Index Metrics
-
H-Index14
-
i10 Index19
-
Citation Counts958
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* Total H Index Rankings
Rankings
760,218
World Rank
2,089
Country Rank
241
University
Ranking Based On Selection:
18
* Total H Index Rankings
Rankings
762,257
World Rank
2,113
Country Rank
114
University
Ranking Based On Selection:
19
Engineering & Technology / Environmental Science & Engineering
Environmental Engineering | Materials for Building Services | Environmental Quality | Circular Economy | Wastes Managemen
Environmental Engineering | Materials for Building Services | Environmental Quality | Circular Economy | Wastes Managemen
H-Index Metrics
-
H-Index14
-
i10 Index19
-
Citation Counts645
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* Total H Index Rankings
Rankings
771,306
World Rank
2,163
Country Rank
115
University
Ranking Based On Selection:
20
Engineering & Technology / Environmental Science & Engineering
Envionmental Engineering | Acoustical Material
Envionmental Engineering | Acoustical Material
H-Index Metrics
-
H-Index14
-
i10 Index18
-
Citation Counts880
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* Total H Index Rankings
Rankings
795,109
World Rank
2,340
Country Rank
65
University
Ranking Based On Selection:
21
* Total H Index Rankings
Rankings
811,646
World Rank
2,435
Country Rank
62
University
Ranking Based On Selection:
22
* Total H Index Rankings
Rankings
812,237
World Rank
2,439
Country Rank
82
University
Ranking Based On Selection:
23
Engineering & Technology / Environmental Science & Engineering
environmental engineering | materials engineering | chemical engineering | metallurg
environmental engineering | materials engineering | chemical engineering | metallurg
H-Index Metrics
-
H-Index13
-
i10 Index15
-
Citation Counts1,361
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* Total H Index Rankings
Rankings
837,730
World Rank
2,642
Country Rank
90
University
Ranking Based On Selection:
24
Engineering & Technology / Environmental Science & Engineering
Energy efficiency | solar thermal energy | biomass energy | air pollution contro
Energy efficiency | solar thermal energy | biomass energy | air pollution contro
H-Index Metrics
-
H-Index13
-
i10 Index18
-
Citation Counts678
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* Total H Index Rankings
Rankings
842,031
World Rank
2,683
Country Rank
192
University
Ranking Based On Selection:
25
Engineering & Technology / Environmental Science & Engineering
Thermodynamics | water oxygenation | environmental engineering | mechanical engineerin
Thermodynamics | water oxygenation | environmental engineering | mechanical engineerin
H-Index Metrics
-
H-Index13
-
i10 Index14
-
Citation Counts375
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