Citation Rankings
Highly Cited Researchers
American University Highly Cited Researchers CitationEngineering & Technology / Environmental Science & Engineering Rankings 2025
The Citation Rankings (Highly Cited Researchers) highlight the most cited and influential researchers across a vast range of scientific fields, covering 197 main and sub-disciplines, including the Art and Humanities Citation Rankings and Social Sciences and Humanities Citation Rankings. This service, offered exclusively by AD Scientific Index, aims to provide a balanced perspective by excluding data from CERN and other statistical sources that disproportionately favor certain researchers, particularly in the social sciences and humanities. This unique approach addresses the advantages researchers with multi-author publications and CERN involvement hold over others. Furthermore, citation rankings help uncover rule violations and unethical practices within the research community. For more detailed citation analyses, explore the Scientists Last 6 Years Citation Index, Universities Total Citations Rankings 2025, and Universities Last 6 Years Citations Rankings 2025.
* Total Citation Counts Rankings
Ranking Based On Selection :1
Waste management
Water resources management
Air pollution control
Climate change and sustainable development
Environmental i
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,250
5,187
0.423
* Total Citation Counts Rankings
Ranking Based On Selection :2
environmental policy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,561
1,683
0.257
* Total Citation Counts Rankings
Ranking Based On Selection :3
Conservation of energy
thermal comfort and indoor air quality
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,345
3,655
0.576
* Total Citation Counts Rankings
Ranking Based On Selection :4
marine biology
community ecology
diseases
coral reefs
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,156
1,412
0.229
* Total Citation Counts Rankings
Ranking Based On Selection :5
environmental politics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,213
1,158
0.222
* Total Citation Counts Rankings
Ranking Based On Selection :6
Water Treatment
Advanced Oxidation Processes
Instrumental Analysis
Spectroscopy
Forensic Science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,070
2,946
0.581
* Total Citation Counts Rankings
Ranking Based On Selection :7
Occupational Health
Migrant Workers Health
Built Environment
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,951
2,210
0.446
* Total Citation Counts Rankings
Ranking Based On Selection :8
Environmental risk
uncertainties
climate policy
innovations and global capital markets
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,445
1,073
0.241
* Total Citation Counts Rankings
Ranking Based On Selection :9
Environmental Engineering
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,146
2,176
0.525
* Total Citation Counts Rankings
Ranking Based On Selection :10
Air Pollution
Climate Change
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,150
1,125
0.357
* Total Citation Counts Rankings
Ranking Based On Selection :11
Water Treatment
Environmental Remediation
Sustainability
Nutrient Recovery
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,906
1,198
0.412
* Total Citation Counts Rankings
Ranking Based On Selection :12
Biofiltration
Air Pollution Control
Waste Management and Control
Bioreactor Modeling
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,882
680
0.236
* Total Citation Counts Rankings
Ranking Based On Selection :13
China
global environmental politics
environmental justice
civil society
sustainable development
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,801
1,100
0.393
* Total Citation Counts Rankings
Ranking Based On Selection :14
eco-evolutionary dynamics
community ecology
community assembly
ecological forecasting
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,491
1,807
0.725
* Total Citation Counts Rankings
Ranking Based On Selection :15
water quality
eutrophication
bayesian modelling
environmental remote sensing & GIS
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,419
1,797
0.743
* Total Citation Counts Rankings
Ranking Based On Selection :16
Systems Optimization
Energy Infrastructure
Bilevel Optimization
Macro-Energy Systems
Interaction of Food/Energy/Water System
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,350
1,705
0.726
* Total Citation Counts Rankings
Ranking Based On Selection :17
Climate
Atmospheric science
Atmospheric aerosol
stratosphere
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,670
1,069
0.640
* Total Citation Counts Rankings
Ranking Based On Selection :18
Submarine groundwater discharge
groundwater-surface water interactions
pollution fate and transport
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,584
856
0.540
* Total Citation Counts Rankings
Ranking Based On Selection :19
Water Resources
Climate Change adaptation
Disasters
Mass Emergencies
Hydrology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,406
499
0.355
* Total Citation Counts Rankings
Ranking Based On Selection :20
artificial intelligence
watermarking
data hiding
image and video processing
machine learning
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,374
990
0.721
* Total Citation Counts Rankings
Ranking Based On Selection :21
Remote Sensing
GIS
Geology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,276
920
0.721
* Total Citation Counts Rankings
Ranking Based On Selection :22
Environmental Engineering
Anaerobic Digestion
Water Reuse
Microbiology/Biotechnology
Emerging Contaminants
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,269
1,009
0.795
* Total Citation Counts Rankings
Ranking Based On Selection :23
water security
food security
politics
MENA region
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,165
761
0.653
* Total Citation Counts Rankings
Ranking Based On Selection :24
Process dynamics and control
Simulation. Wastewater
Water technologies. Corrosion. Air pollution using bio-filtration and Rene
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,168
829
0.710
* Total Citation Counts Rankings
Ranking Based On Selection :25
Climate Change
Environmental Toxicology and Chemistry
Persistent Organic Pollutants
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,001
640
0.639
* Total Citation Counts Rankings
Rankings
77,741
28
19
Ranking Based On Selection: 1
Mutasem El Fadel
American University of Beirut
Beirut, Lebanon
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,250
5,187
0.423
Waste management
Water resources management
Air pollution control
Climate change and sustainable development
Environmental i
* Total Citation Counts Rankings
Rankings
157,362
58,576
38
Ranking Based On Selection: 2
Daniel J Fiorino
American University
Washington, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,561
1,683
0.257
* Total Citation Counts Rankings
Rankings
162,805
70
49
Ranking Based On Selection: 3
Kamel Ghali
American University of Beirut
Beirut, Lebanon
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,345
3,655
0.576
Conservation of energy
thermal comfort and indoor air quality
* Total Citation Counts Rankings
Rankings
167,971
61,905
43
Ranking Based On Selection: 4
Kiho Kim
American University
Washington, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,156
1,412
0.229
marine biology
community ecology
diseases
coral reefs
* Total Citation Counts Rankings
Rankings
197,789
71,039
54
Ranking Based On Selection: 5
Paul Wapner
American University
Washington, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,213
1,158
0.222
environmental politics
* Total Citation Counts Rankings
Rankings
203,154
112
79
Ranking Based On Selection: 6
Antoine Ghauch
American University of Beirut
Beirut, Lebanon
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,070
2,946
0.581
Water Treatment
Advanced Oxidation Processes
Instrumental Analysis
Spectroscopy
Forensic Science
* Total Citation Counts Rankings
Rankings
207,978
116
83
Ranking Based On Selection: 7
Rima Habib
American University of Beirut
Beirut, Lebanon
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,951
2,210
0.446
Occupational Health
Migrant Workers Health
Built Environment
* Total Citation Counts Rankings
Rankings
230,337
80,733
68
Ranking Based On Selection: 8
Alexander A Golub
American University
Washington, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,445
1,073
0.241
Environmental risk
uncertainties
climate policy
innovations and global capital markets
* Total Citation Counts Rankings
Rankings
245,577
149
102
Ranking Based On Selection: 9
George M Ayoub
American University of Beirut
Beirut, Lebanon
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,146
2,176
0.525
Environmental Engineering
* Total Citation Counts Rankings
Rankings
311,599
104,116
101
Ranking Based On Selection: 10
Michael S Brody
American University
Washington, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,150
1,125
0.357
Air Pollution
Climate Change
* Total Citation Counts Rankings
Rankings
333,025
226
18
Ranking Based On Selection: 11
Mahmoud Wazne
Lebanese American University
Beirut, Lebanon
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,906
1,198
0.412
Water Treatment
Environmental Remediation
Sustainability
Nutrient Recovery
* Total Citation Counts Rankings
Rankings
335,204
539
49
Ranking Based On Selection: 12
Zarook M Shareefdeen
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,882
680
0.236
Biofiltration
Air Pollution Control
Waste Management and Control
Bioreactor Modeling
* Total Citation Counts Rankings
Rankings
343,082
112,916
107
Ranking Based On Selection: 13
Judith Shapiro
American University
Washington, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,801
1,100
0.393
China
global environmental politics
environmental justice
civil society
sustainable development
* Total Citation Counts Rankings
Rankings
376,346
11,805
4
Ranking Based On Selection: 14
Jelena H Pantel
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,491
1,807
0.725
eco-evolutionary dynamics
community ecology
community assembly
ecological forecasting
* Total Citation Counts Rankings
Rankings
384,857
273
173
Ranking Based On Selection: 15
Ibrahim Alameddine
American University of Beirut
Beirut, Lebanon
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,419
1,797
0.743
water quality
eutrophication
bayesian modelling
environmental remote sensing & GIS
* Total Citation Counts Rankings
Rankings
393,427
126,728
127
Ranking Based On Selection: 16
Sauleh Siddiqui
American University
Washington, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,350
1,705
0.726
Systems Optimization
Energy Infrastructure
Bilevel Optimization
Macro-Energy Systems
Interaction of Food/Energy/Water System
* Total Citation Counts Rankings
Rankings
501,805
155,857
160
Ranking Based On Selection: 17
Valentina Aquila
American University
Washington, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,670
1,069
0.640
Climate
Atmospheric science
Atmospheric aerosol
stratosphere
* Total Citation Counts Rankings
Rankings
519,730
160,571
169
Ranking Based On Selection: 18
KL Knee
American University
Washington, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,584
856
0.540
Submarine groundwater discharge
groundwater-surface water interactions
pollution fate and transport
* Total Citation Counts Rankings
Rankings
560,464
1,005
9
Ranking Based On Selection: 19
Hamed Assaf
American University of Ras al Khaimah AURAK
Ras al-Khaimah, United Arab Emirates
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,406
499
0.355
Water Resources
Climate Change adaptation
Disasters
Mass Emergencies
Hydrology
* Total Citation Counts Rankings
Rankings
568,282
166
16
Ranking Based On Selection: 20
Ersin Elbaşi|Ersin Elbaşı, E. Elbasi, Elbasi E.
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,374
990
0.721
artificial intelligence
watermarking
data hiding
image and video processing
machine learning
* Total Citation Counts Rankings
Rankings
594,312
1,080
115
Ranking Based On Selection: 21
Samy Elmahdy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,276
920
0.721
Remote Sensing
GIS
Geology
* Total Citation Counts Rankings
Rankings
596,182
477
48
Ranking Based On Selection: 22
Moustapha Harb
Lebanese American University
Beirut, Lebanon
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,269
1,009
0.795
Environmental Engineering
Anaerobic Digestion
Water Reuse
Microbiology/Biotechnology
Emerging Contaminants
* Total Citation Counts Rankings
Rankings
626,522
510
281
Ranking Based On Selection: 23
Martin Keulertz
American University of Beirut
Beirut, Lebanon
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,165
761
0.653
water security
food security
politics
MENA region
* Total Citation Counts Rankings
Rankings
625,613
1,154
120
Ranking Based On Selection: 24
Ahmed Aidan
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,168
829
0.710
Process dynamics and control
Simulation. Wastewater
Water technologies. Corrosion. Air pollution using bio-filtration and Rene
* Total Citation Counts Rankings
Rankings
681,233
1,281
131
Ranking Based On Selection: 25
Fatin Samara
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,001
640
0.639
Climate Change
Environmental Toxicology and Chemistry
Persistent Organic Pollutants