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
Earth and Planetary Sciences
Climate Change
Renewable Energy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,376
4,169
0.565
* Total Citation Counts Rankings
Ranking Based On Selection :2
Water Quality
Desalination
Soil Salinity
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,234
2,027
0.479
* Total Citation Counts Rankings
Ranking Based On Selection :3
Environmental Sciences
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,682
1,759
0.478
* Total Citation Counts Rankings
Ranking Based On Selection :4
Microbial electrochemistry
BIo-Hydrogen
Membrane Separation
Aanaerobic digestion
Air pollution
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,308
2,736
0.827
* Total Citation Counts Rankings
Ranking Based On Selection :5
Waste valorization
Biorefinery
Biofuel
Bioplastic
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,447
2,085
0.852
* Total Citation Counts Rankings
Ranking Based On Selection :6
Environmental chemistry
Analytical chemistry
Water treatment
Adsorption
Waste treatment
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,253
1,184
0.526
* Total Citation Counts Rankings
Ranking Based On Selection :7
Groundwater Hydrology
Geo-environmental Engineering
Contaminant transport in groundwater
Image
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,580
1,551
0.982
* Total Citation Counts Rankings
Ranking Based On Selection :8
Waste Management
Landfilling
Biogas
Expert System
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,234
934
0.757
* Total Citation Counts Rankings
Ranking Based On Selection :9
Hydrogeology
Groundwater modeling
Decision support systems
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,163
944
0.812
* Total Citation Counts Rankings
Ranking Based On Selection :10
Environmental Impact Assessment
Pollution remediation and waste management
Climate change adaptation.
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,024
779
0.761
* Total Citation Counts Rankings
Ranking Based On Selection :11
Nano Membrane Technology
Biosorption Environmental Engineering
Renewable Energy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,012
600
0.593
* Total Citation Counts Rankings
Ranking Based On Selection :12
Climate change
Hydrology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
575
350
0.609
* Total Citation Counts Rankings
Ranking Based On Selection :13
Environmental and Water Resources Engineering (Groundwater Modeling)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
548
354
0.646
* Total Citation Counts Rankings
Ranking Based On Selection :14
Water Treatment
Soil Science and Environmental issues
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
538
228
0.424
* Total Citation Counts Rankings
Ranking Based On Selection :15
Water Resources Management
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
477
242
0.507
* Total Citation Counts Rankings
Ranking Based On Selection :16
Chemical and Environmental Engineering
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
467
279
0.597
* Total Citation Counts Rankings
Ranking Based On Selection :17
Water resources management
Hydrology
Environmental Science
Data Analytics
Genetic Programming
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
261
258
0.989
* Total Citation Counts Rankings
Ranking Based On Selection :18
soils and water resources management
sustainable environmental management
HYDRUS modelling
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
245
244
0.996
* Total Citation Counts Rankings
Ranking Based On Selection :19
Enviornmental Engineering
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
153
96
0.627
* Total Citation Counts Rankings
Ranking Based On Selection :20
Wastewater treatment
Environmental Engineering
Heat Transfer
Renewable Energy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
148
125
0.845
* Total Citation Counts Rankings
Ranking Based On Selection :21
Chemical Engineering
Environmental Engineering
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
79
54
0.684
* Total Citation Counts Rankings
Ranking Based On Selection :22
Chemical Engineering
Environmental Engineering
Wastewater treatment
Inverse Fluidization
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
67
64
0.955
* Total Citation Counts Rankings
Ranking Based On Selection :23
Environmental Management
Occupational Safety and Health
Bioremediation
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10
10
1.000
* Total Citation Counts Rankings
Ranking Based On Selection :24
Environment
Material
Soil
Water
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6
6
1.000
Yassine Charabi
Sultan Qaboos University
Muscat, Oman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,376
4,169
0.565
Earth and Planetary Sciences
Climate Change
Renewable Energy
Mushtaque Ahmed
Sultan Qaboos University
Muscat, Oman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,234
2,027
0.479
Water Quality
Desalination
Soil Salinity
Shaharoona
Sultan Qaboos University
Muscat, Oman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,682
1,759
0.478
Environmental Sciences
Abdullah Al Mamun
Sultan Qaboos University
Muscat, Oman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,308
2,736
0.827
Microbial electrochemistry
BIo-Hydrogen
Membrane Separation
Aanaerobic digestion
Air pollution
Sivakumar Nallusamy
Sultan Qaboos University
Muscat, Oman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,447
2,085
0.852
Waste valorization
Biorefinery
Biofuel
Bioplastic
El Said I El Shafey
Sultan Qaboos University
Muscat, Oman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,253
1,184
0.526
Environmental chemistry
Analytical chemistry
Water treatment
Adsorption
Waste treatment
Motasem YD Alazaiza
A'Sharqiyah University
Ibra, Oman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,580
1,551
0.982
Groundwater Hydrology
Geo-environmental Engineering
Contaminant transport in groundwater
Image
Mohammed Fm Abushammala
Middle East College
Muscat, Oman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,234
934
0.757
Waste Management
Landfilling
Biogas
Expert System
Azizallah Izady
Sultan Qaboos University
Muscat, Oman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,163
944
0.812
Hydrogeology
Groundwater modeling
Decision support systems
Hameed Sulaiman
Sultan Qaboos University
Muscat, Oman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,024
779
0.761
Environmental Impact Assessment
Pollution remediation and waste management
Climate change adaptation.
Senthilkumar R
College of Applied Sciences Rustaq
Johor Bahru, Oman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,012
600
0.593
Nano Membrane Technology
Biosorption Environmental Engineering
Renewable Energy
Luminda Gunawardhana
Sultan Qaboos University
Muscat, Oman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
575
350
0.609
Climate change
Hydrology
Mahaad Shammas
Dhofar University
Salalah, Oman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
548
354
0.646
Environmental and Water Resources Engineering (Groundwater Modeling)
Mansour Al Haddabi
Sultan Qaboos University
Muscat, Oman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
538
228
0.424
Water Treatment
Soil Science and Environmental issues
Akbar Karimi
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
477
242
0.507
Water Resources Management
Nitin Raut
Sohar University
Sohar, Oman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
467
279
0.597
Chemical and Environmental Engineering
Mohammad Sadegh Khorshidi|Mohammad S. Khorshidi
Sultan Qaboos University
Muscat, Oman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
261
258
0.989
Water resources management
Hydrology
Environmental Science
Data Analytics
Genetic Programming
Ahmed Al-Mayahi
Sultan Qaboos University
Muscat, Oman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
245
244
0.996
soils and water resources management
sustainable environmental management
HYDRUS modelling
Siva Subramanian
Higher College of Technology
Muscat, Oman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
153
96
0.627
Enviornmental Engineering
Saravanan Am
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
148
125
0.845
Wastewater treatment
Environmental Engineering
Heat Transfer
Renewable Energy
Joefel Jessica Cansino Dumaran
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
79
54
0.684
Chemical Engineering
Environmental Engineering
Karunya Sakhile
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
67
64
0.955
Chemical Engineering
Environmental Engineering
Wastewater treatment
Inverse Fluidization
Dodeye Ubana
Modern College of Business & Science
Bawshar, Oman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10
10
1.000
Environmental Management
Occupational Safety and Health
Bioremediation
Eng Ahmed Al-Hinai
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6
6
1.000
Environment
Material
Soil
Water