Subject Rankings

World Engineering & Technology Subject Rankings 2025

AD Scientific Index (Alper-Doger Scientific Index) offers the broadest spectrum of branches, providing analysis in 13 main fields and 197 sub-branches at global, national, and regional levels. These analyses can be based on indicators such as the H-index, i10-index, and citation count, as well as their values from the last 6 years. As of Nov 21, 2024, rankings are according to the Total H Index. BETA VERSION: The subject field rankings for the world, regions, countries, and universities are currently in beta. This is due to the exclusion of (873.864) scientists categorized under 'others,' whose profiles cannot yet be determined, edited, or classified. As these fields are updated, the rankings will adjust accordingly. Please keep this in mind. See Also: [University Subject Rankings]

Total 19.907 scientist, 200 country, 15.241 institution
* Total H IndexRankings
Ranking Based On Selection :26
Wang Jinsheng(王金生)
Groundwater
Hydrogeology
Hydrology
Earth Sciences
Metrics
H-Index
i10 Index
Citation Counts
127
1,089
75,846
* Total H IndexRankings
Ranking Based On Selection :27
Zhiguo Yuan
Urban Water Management
Environmental Biotechnology
Metrics
H-Index
i10 Index
Citation Counts
126
560
55,260
* Total H IndexRankings
Ranking Based On Selection :28
Shenghai Li (李生海)
Glacier energy and mass balance
Climate change at high altitude region
Glacier hydology
Metrics
H-Index
i10 Index
Citation Counts
125
1,214
82,325
* Total H IndexRankings
Ranking Based On Selection :29
Drew Shindell
Climate change
atmospheric chemistry
climate policy
Metrics
H-Index
i10 Index
Citation Counts
124
265
99,338
* Total H IndexRankings
Ranking Based On Selection :30
Michael Jerrett
air pollution
exposure
built environment
health effects
GIS
Metrics
H-Index
i10 Index
Citation Counts
123
301
57,321
* Total H IndexRankings
Ranking Based On Selection :31
Keith A Hobson
Conservation Biology
stable isotopes
Metrics
H-Index
i10 Index
Citation Counts
123
569
61,692
* Total H IndexRankings
Ranking Based On Selection :32
Xie Quan
environmental science
chemical engineering
water treatment
catalysis
Metrics
H-Index
i10 Index
Citation Counts
122
579
52,489
* Total H IndexRankings
Ranking Based On Selection :33
Wonyong Choi
Photocatalysis
Solar fuel
Advanced oxidation process
Environmental chemistry
Environmental engineering
Metrics
H-Index
i10 Index
Citation Counts
122
333
77,127
* Total H IndexRankings
Ranking Based On Selection :34
Gretchen C Daily
conservation science
ecosystem services
environmental science
sustainable agriculture
sustainable development
Metrics
H-Index
i10 Index
Citation Counts
122
246
97,687
* Total H IndexRankings
Ranking Based On Selection :35
André Pc Faaij
energy
environmental science
engineering
renewable_energy
bioenergy
Metrics
H-Index
i10 Index
Citation Counts
122
415
62,905
* Total H IndexRankings
Ranking Based On Selection :36
Keywan Riahi
climate change
energy economics
integrated assessment
technological change
sustainable development
Metrics
H-Index
i10 Index
Citation Counts
121
291
128,012
* Total H IndexRankings
Ranking Based On Selection :37
Xi Chen
Hydrological modeling and prediction
Surface water and groundwater interaction
Hydrological response to climate change
Metrics
H-Index
i10 Index
Citation Counts
121
974
62,474
* Total H IndexRankings
Ranking Based On Selection :38
Lambin Eric F
Environmental sciences
Geography
Land change science
Land system science
Metrics
H-Index
i10 Index
Citation Counts
121
274
103,588
* Total H IndexRankings
Ranking Based On Selection :40
Jorge Gardea Torresdey
Environmental Nanotechnology
Environmental Science & Engineering
Nanotoxicology
Environmental Chemistry
Phytoremediation
Metrics
H-Index
i10 Index
Citation Counts
120
392
48,306
* Total H IndexRankings
Ranking Based On Selection :41
Bruce E Rittmann
Environmental Biotechnology
Environmental Engineering
Biogeochemistry
Resource Recovery
Metrics
H-Index
i10 Index
Citation Counts
120
616
65,720
* Total H IndexRankings
Ranking Based On Selection :42
Bin Gao
Environmental Science & Engineering
Contaminant Hydrology
Environmental Nanotechnology
Biochar
Metrics
H-Index
i10 Index
Citation Counts
118
396
59,545
* Total H IndexRankings
Ranking Based On Selection :43
Shafaqat Ali
Phytotoxicity and Phytoremidiation of heavy metals and industrial effluents
stress physiology
Environmental Science
biochar
Metrics
H-Index
i10 Index
Citation Counts
118
546
49,910
* Total H IndexRankings
Ranking Based On Selection :44
Chen ling
Environmental analytical chemistry
Environmental monitoring
the fate of pollutants
Metrics
H-Index
i10 Index
Citation Counts
118
977
68,123
* Total H IndexRankings
Ranking Based On Selection :45
Charles T Driscoll
environmental engineering
environmental science
biogeochemistry
air pollution effects
human disturbance of ecosystems
Metrics
H-Index
i10 Index
Citation Counts
118
508
56,019
* Total H IndexRankings
Ranking Based On Selection :46
Chuyang Tang
Environmental engineering
Membrane technology
Desalination
Water reuse
Metrics
H-Index
i10 Index
Citation Counts
117
344
44,876
* Total H IndexRankings
Ranking Based On Selection :47
Pedro Jj Alvarez
environmental engineering
environmental nanotechnology
water treatment
biodegradation
Metrics
H-Index
i10 Index
Citation Counts
117
387
61,475
* Total H IndexRankings
Ranking Based On Selection :48
Olivier Boucher
climate
climate change
Earth system modelling
aerosols
aerosol-radiation interactions
Metrics
H-Index
i10 Index
Citation Counts
117
354
64,037
* Total H IndexRankings
Ranking Based On Selection :49
Paul Westerhoff
water treatment
environmental nanotechnology
Metrics
H-Index
i10 Index
Citation Counts
117
384
59,782
* Total H Index Rankings
Rankings
Ranking Based On Selection: 26
Wang Jinsheng(王金生)
Metrics
H-Index
i10-Index
Citation Counts
127
1,089
75,846
* Total H Index Rankings
Rankings
Ranking Based On Selection: 27
Zhiguo Yuan
Metrics
H-Index
i10-Index
Citation Counts
126
560
55,260
* Total H Index Rankings
Rankings
Ranking Based On Selection: 28
Shenghai Li (李生海)
Metrics
H-Index
i10-Index
Citation Counts
125
1,214
82,325
Glacier energy and mass balance
Climate change at high altitude region
Glacier hydology
* Total H Index Rankings
Rankings
Ranking Based On Selection: 29
Drew Shindell
Metrics
H-Index
i10-Index
Citation Counts
124
265
99,338
* Total H Index Rankings
Rankings
Ranking Based On Selection: 30
Michael Jerrett
Metrics
H-Index
i10-Index
Citation Counts
123
301
57,321
* Total H Index Rankings
Rankings
Ranking Based On Selection: 31
Keith A Hobson
Metrics
H-Index
i10-Index
Citation Counts
123
569
61,692
* Total H Index Rankings
Rankings
Ranking Based On Selection: 32
Xie Quan
Metrics
H-Index
i10-Index
Citation Counts
122
579
52,489
environmental science
chemical engineering
water treatment
catalysis
* Total H Index Rankings
Rankings
Ranking Based On Selection: 33
Wonyong Choi
Metrics
H-Index
i10-Index
Citation Counts
122
333
77,127
Photocatalysis
Solar fuel
Advanced oxidation process
Environmental chemistry
Environmental engineering
* Total H Index Rankings
Rankings
Ranking Based On Selection: 34
Gretchen C Daily
Metrics
H-Index
i10-Index
Citation Counts
122
246
97,687
conservation science
ecosystem services
environmental science
sustainable agriculture
sustainable development
* Total H Index Rankings
Rankings
Ranking Based On Selection: 35
André Pc Faaij
Metrics
H-Index
i10-Index
Citation Counts
122
415
62,905
energy
environmental science
engineering
renewable_energy
bioenergy
* Total H Index Rankings
Rankings
Ranking Based On Selection: 36
Keywan Riahi
Metrics
H-Index
i10-Index
Citation Counts
121
291
128,012
climate change
energy economics
integrated assessment
technological change
sustainable development
* Total H Index Rankings
Rankings
Ranking Based On Selection: 37
Xi Chen
Metrics
H-Index
i10-Index
Citation Counts
121
974
62,474
Hydrological modeling and prediction
Surface water and groundwater interaction
Hydrological response to climate change
* Total H Index Rankings
Rankings
Ranking Based On Selection: 38
Lambin Eric F
Metrics
H-Index
i10-Index
Citation Counts
121
274
103,588
Environmental sciences
Geography
Land change science
Land system science
* Total H Index Rankings
Rankings
Ranking Based On Selection: 39
Eric A Davidson
Metrics
H-Index
i10-Index
Citation Counts
121
246
74,269
* Total H Index Rankings
Rankings
Ranking Based On Selection: 40
Jorge Gardea Torresdey
Metrics
H-Index
i10-Index
Citation Counts
120
392
48,306
Environmental Nanotechnology
Environmental Science & Engineering
Nanotoxicology
Environmental Chemistry
Phytoremediation
* Total H Index Rankings
Rankings
Ranking Based On Selection: 41
Bruce E Rittmann
Metrics
H-Index
i10-Index
Citation Counts
120
616
65,720
Environmental Biotechnology
Environmental Engineering
Biogeochemistry
Resource Recovery
* Total H Index Rankings
Rankings
Ranking Based On Selection: 42
Bin Gao
Metrics
H-Index
i10-Index
Citation Counts
118
396
59,545
Environmental Science & Engineering
Contaminant Hydrology
Environmental Nanotechnology
Biochar
* Total H Index Rankings
Rankings
Ranking Based On Selection: 43
Shafaqat Ali
Metrics
H-Index
i10-Index
Citation Counts
118
546
49,910
Phytotoxicity and Phytoremidiation of heavy metals and industrial effluents
stress physiology
Environmental Science
biochar
* Total H Index Rankings
Rankings
Ranking Based On Selection: 44
Chen ling
Metrics
H-Index
i10-Index
Citation Counts
118
977
68,123
Environmental analytical chemistry
Environmental monitoring
the fate of pollutants
* Total H Index Rankings
Rankings
Ranking Based On Selection: 45
Charles T Driscoll
Metrics
H-Index
i10-Index
Citation Counts
118
508
56,019
environmental engineering
environmental science
biogeochemistry
air pollution effects
human disturbance of ecosystems
* Total H Index Rankings
Rankings
Ranking Based On Selection: 46
Chuyang Tang
Metrics
H-Index
i10-Index
Citation Counts
117
344
44,876
Environmental engineering
Membrane technology
Desalination
Water reuse
* Total H Index Rankings
Rankings
Ranking Based On Selection: 47
Pedro Jj Alvarez
Metrics
H-Index
i10-Index
Citation Counts
117
387
61,475
environmental engineering
environmental nanotechnology
water treatment
biodegradation
* Total H Index Rankings
Rankings
Ranking Based On Selection: 48
Olivier Boucher
Metrics
H-Index
i10-Index
Citation Counts
117
354
64,037
climate
climate change
Earth system modelling
aerosols
aerosol-radiation interactions
* Total H Index Rankings
Rankings
Ranking Based On Selection: 49
Paul Westerhoff
Metrics
H-Index
i10-Index
Citation Counts
117
384
59,782
* Total H Index Rankings
Rankings
Ranking Based On Selection: 50
Thomas H Christensen
Metrics
H-Index
i10-Index
Citation Counts
117
359
44,006