Citation Rankings
Highly Cited Researchers
Engineering & Technology / Environmental Science & Engineering Highly Cited Researchers Citation 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
enviornmental science
enviornmental biology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,882
9,458
0.529
* Total Citation Counts Rankings
Ranking Based On Selection: 2
Advanced Oxidation Processes
Ozone
UV
Electrolysis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,906
3,484
0.352
* Total Citation Counts Rankings
Ranking Based On Selection: 3
Natural resource management
climate change adaptation
rural livelihoods
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,650
1,322
0.499
* Total Citation Counts Rankings
Ranking Based On Selection: 4
Water and Sanitation
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,876
1,297
0.691
* Total Citation Counts Rankings
Ranking Based On Selection: 5
sustinability
climate change
landscape dynamics
geoarchaeology
physical geog
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
769
653
0.849
* Total Citation Counts Rankings
Ranking Based On Selection: 6
Air quality
Climate Modeling
Adaptation and Mitigation of Climate impacts
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
674
465
0.690
* Total Citation Counts Rankings
Ranking Based On Selection: 7
Hydrology
Water Resources Management
Hydroclimatic Time Series Analysis
Climate Change
Land use
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
673
612
0.909
* Total Citation Counts Rankings
Ranking Based On Selection: 8
Biodiversity Conservation and Utilization
Plant Biotechnology
Plant Breeding
Environmental Science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
621
424
0.683
* Total Citation Counts Rankings
Ranking Based On Selection: 9
Environmental Biotechnology
Industrial Biotechnology
Environmental Science
Wastewater Treatment
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
550
547
0.995
* Total Citation Counts Rankings
Ranking Based On Selection: 10
Environmental Engineering
Water and Wastewater treatment
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
542
533
0.983
* Total Citation Counts Rankings
Ranking Based On Selection: 11
• Water pollution prevention and remediation
Water and Wastewater treatment
Air pollution
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
540
534
0.989
* Total Citation Counts Rankings
Ranking Based On Selection: 12
Climate change adaptation
social protection
livelihood diversfication
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
500
444
0.888
* Total Citation Counts Rankings
Ranking Based On Selection: 13
Climate Science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
386
369
0.956
* Total Citation Counts Rankings
Ranking Based On Selection: 14
Climate Change
Vulnerability
Livelihood Resilience
Migration
Empowerment
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
330
320
0.970
* Total Citation Counts Rankings
Ranking Based On Selection: 15
Climate change
Environmental
and Industrial Biotechnology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
282
282
1.000
* Total Citation Counts Rankings
Ranking Based On Selection: 16
Climate change
variability
resilience
adaptation
livelihood
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
253
250
0.988
* Total Citation Counts Rankings
Ranking Based On Selection: 17
Environmental Science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
234
73
0.312
* Total Citation Counts Rankings
Ranking Based On Selection: 18
Climate Change Impact
Vulnerability
& Adaptation
Natural Resource Management
Watershed Management
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
200
192
0.960
* Total Citation Counts Rankings
Ranking Based On Selection: 19
Water and Wastewater Treatment Technology
Water Quality Analysis
Electrochemical Treatment
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
188
188
1.000
* Total Citation Counts Rankings
Ranking Based On Selection: 20
Natural resource management
Geospatial analysis
Food Security
Climate Change
Watershed
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
166
129
0.777
* Total Citation Counts Rankings
Ranking Based On Selection: 21
Environment
Water and Energy (Wastewater Treatment
Waste to Energy
Adsorption)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
163
159
0.975
* Total Citation Counts Rankings
Ranking Based On Selection: 22
Environmental science
WASH
Epidemiology
Freshwater ecology
Limnology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
135
118
0.874
* Total Citation Counts Rankings
Ranking Based On Selection: 23
Environmental Engineering
Renewable Energy Engineering
Water and Wastewater Engineering
Air Pollution Engineering
Soil and G
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
118
118
1.000
* Total Citation Counts Rankings
Ranking Based On Selection: 24
Environmental Studies
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
100
100
1.000
* Total Citation Counts Rankings
Ranking Based On Selection: 25
climate change and rural livelihood
food security analysis
financial development
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
82
80
0.976
* Total Citation Counts Rankings
Rankings
47,268
41
8
Ranking Based On Selection: 1
Mazharuddin Khan
Addis Ababa University
Addis Ababa, Ethiopia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,882
9,458
0.529
enviornmental science
enviornmental biology
* Total Citation Counts Rankings
Rankings
99,564
74
17
Ranking Based On Selection: 2
Joon Wun Kang
Addis Ababa University
Addis Ababa, Ethiopia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,906
3,484
0.352
Advanced Oxidation Processes
Ozone
UV
Electrolysis
* Total Citation Counts Rankings
Rankings
356,785
172
53
Ranking Based On Selection: 3
Aklilu Amsalu
Addis Ababa University
Addis Ababa, Ethiopia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,650
1,322
0.499
Natural resource management
climate change adaptation
rural livelihoods
* Total Citation Counts Rankings
Rankings
461,105
240
66
Ranking Based On Selection: 4
Feleke Zewge
Addis Ababa University
Addis Ababa, Ethiopia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,876
1,297
0.691
* Total Citation Counts Rankings
Rankings
771,916
517
92
Ranking Based On Selection: 5
Engdawork Assefa
Addis Ababa University
Addis Ababa, Ethiopia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
769
653
0.849
sustinability
climate change
landscape dynamics
geoarchaeology
physical geog
* Total Citation Counts Rankings
Rankings
817,377
573
98
Ranking Based On Selection: 6
Kassahun Ture
Addis Ababa University
Addis Ababa, Ethiopia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
674
465
0.690
Air quality
Climate Modeling
Adaptation and Mitigation of Climate impacts
* Total Citation Counts Rankings
Rankings
817,758
574
99
Ranking Based On Selection: 7
Tekalegn Ayele Woldesenbet
Addis Ababa University
Addis Ababa, Ethiopia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
673
612
0.909
Hydrology
Water Resources Management
Hydroclimatic Time Series Analysis
Climate Change
Land use
* Total Citation Counts Rankings
Rankings
844,615
613
19
Ranking Based On Selection: 8
Solomon Benor
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
621
424
0.683
Biodiversity Conservation and Utilization
Plant Biotechnology
Plant Breeding
Environmental Science
* Total Citation Counts Rankings
Rankings
883,440
673
21
Ranking Based On Selection: 9
Abate Ayele
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
550
547
0.995
Environmental Biotechnology
Industrial Biotechnology
Environmental Science
Wastewater Treatment
* Total Citation Counts Rankings
Rankings
888,140
680
22
Ranking Based On Selection: 10
Amare T Adugna
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
542
533
0.983
Environmental Engineering
Water and Wastewater treatment
* Total Citation Counts Rankings
Rankings
889,323
685
23
Ranking Based On Selection: 11
Kenatu Angassa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
540
534
0.989
• Water pollution prevention and remediation
Water and Wastewater treatment
Air pollution
* Total Citation Counts Rankings
Rankings
917,743
740
118
Ranking Based On Selection: 12
Zerihun Berhane
Addis Ababa University
Addis Ababa, Ethiopia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
500
444
0.888
Climate change adaptation
social protection
livelihood diversfication
* Total Citation Counts Rankings
Rankings
1,022,578
885
29
Ranking Based On Selection: 13
Bereket Tesfaye Haile
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
386
369
0.956
* Total Citation Counts Rankings
Rankings
1,085,108
999
146
Ranking Based On Selection: 14
Befikadu Esayas Amphune
Addis Ababa University
Addis Ababa, Ethiopia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
330
320
0.970
Climate Change
Vulnerability
Livelihood Resilience
Migration
Empowerment
* Total Citation Counts Rankings
Rankings
1,149,384
1,165
35
Ranking Based On Selection: 15
Digafe Alemu
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
282
282
1.000
Climate change
Environmental
and Industrial Biotechnology
* Total Citation Counts Rankings
Rankings
1,195,117
1,285
192
Ranking Based On Selection: 16
Befikadu Esayas
Addis Ababa University
Addis Ababa, Ethiopia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
253
250
0.988
Climate change
variability
resilience
adaptation
livelihood
* Total Citation Counts Rankings
Rankings
1,229,450
1,368
204
Ranking Based On Selection: 17
Khwairakpam Gajananda
Addis Ababa University
Addis Ababa, Ethiopia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
234
73
0.312
Environmental Science
* Total Citation Counts Rankings
Rankings
1,294,724
1,550
46
Ranking Based On Selection: 18
Israel Tessema
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
200
192
0.960
Climate Change Impact
Vulnerability
& Adaptation
Natural Resource Management
Watershed Management
* Total Citation Counts Rankings
Rankings
1,320,458
1,619
230
Ranking Based On Selection: 19
Yemane Gebreselassie Asfaha
Addis Ababa University
Addis Ababa, Ethiopia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
188
188
1.000
Water and Wastewater Treatment Technology
Water Quality Analysis
Electrochemical Treatment
* Total Citation Counts Rankings
Rankings
1,374,938
1,773
254
Ranking Based On Selection: 20
Addisu Damtew
Addis Ababa University
Addis Ababa, Ethiopia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
166
129
0.777
Natural resource management
Geospatial analysis
Food Security
Climate Change
Watershed
* Total Citation Counts Rankings
Rankings
1,381,819
1,799
59
Ranking Based On Selection: 21
Zemene Worku
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
163
159
0.975
Environment
Water and Energy (Wastewater Treatment
Waste to Energy
Adsorption)
* Total Citation Counts Rankings
Rankings
1,463,086
2,016
285
Ranking Based On Selection: 22
Adnan Sirage Ali
Addis Ababa University
Addis Ababa, Ethiopia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
135
118
0.874
Environmental science
WASH
Epidemiology
Freshwater ecology
Limnology
* Total Citation Counts Rankings
Rankings
1,517,351
2,182
76
Ranking Based On Selection: 23
Solomon Tibebu Gebreabe
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
118
118
1.000
Environmental Engineering
Renewable Energy Engineering
Water and Wastewater Engineering
Air Pollution Engineering
Soil and G
* Total Citation Counts Rankings
Rankings
1,584,393
2,396
324
Ranking Based On Selection: 24
Yitayh Leul
Addis Ababa University
Addis Ababa, Ethiopia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
100
100
1.000
Environmental Studies
* Total Citation Counts Rankings
Rankings
1,662,075
2,630
355
Ranking Based On Selection: 25
Hailay Tsigab Kahsay
Addis Ababa University
Addis Ababa, Ethiopia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
82
80
0.976
climate change and rural livelihood
food security analysis
financial development