World Scientist and University Rankings 2025
Sri Lanka Engineering & Technology 109 Scientists Subject Rankings - 2025
The AD Scientific Index (Alper-Doger Scientific Index) provides the most comprehensive analysis across 13 main fields and 197 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 6 years. As of Mar 02, 2025, 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 (941.641) 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 IndexRankings
Ranking Based On Selection: 1
climate change
adaptation
groundwater
energy
agri-food systems
Metrics
H-Index
i10 Index
Citation Counts
41
83
11,128
* Total H IndexRankings
Ranking Based On Selection: 2
Climate change
water policy
food security
poverty
energ economics
Metrics
H-Index
i10 Index
Citation Counts
38
64
10,896
* Total H IndexRankings
Ranking Based On Selection: 3
Environmental Soil Science
Metrics
H-Index
i10 Index
Citation Counts
36
46
5,565
* Total H IndexRankings
Ranking Based On Selection: 4
Air pollution
Epidemiology
Metrics
H-Index
i10 Index
Citation Counts
33
64
5,845
* Total H IndexRankings
Ranking Based On Selection: 5
Hydrology
Climate change impacts
Cryosphere
Water-Food Nexus
climate resilient Systems
Metrics
H-Index
i10 Index
Citation Counts
33
51
6,312
* Total H IndexRankings
Ranking Based On Selection: 6
Climate Change
Water Management
Metrics
H-Index
i10 Index
Citation Counts
32
66
3,812
* Total H IndexRankings
Ranking Based On Selection: 7
Environmental Engineering
Environmental Management
Ecological Engineering
Civil Engineering
Metrics
H-Index
i10 Index
Citation Counts
30
49
3,948
* Total H IndexRankings
Ranking Based On Selection: 8
Water Resource
Civil Engineering
Conflict Resolution
Project Management
IWRM
Metrics
H-Index
i10 Index
Citation Counts
28
84
2,499
* Total H IndexRankings
Ranking Based On Selection: 9
drought
water
climate change
policy
Metrics
H-Index
i10 Index
Citation Counts
27
52
21,171
* Total H IndexRankings
Ranking Based On Selection: 10
Climate change/variability
hydrological modeling
hydrological extremes
water security
water management
Metrics
H-Index
i10 Index
Citation Counts
21
32
1,789
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* Total H IndexRankings
Ranking Based On Selection: 11
Environmental Engineering
Metrics
H-Index
i10 Index
Citation Counts
18
31
1,243
* Total H IndexRankings
Ranking Based On Selection: 12
Water Resources
Environmental Pollution
Climate Change
Planetary Health
Remote Sensing
Metrics
H-Index
i10 Index
Citation Counts
18
22
841
* Total H IndexRankings
Ranking Based On Selection: 13
Hydrological modeling
Climate Change
Remote Sensing
Metrics
H-Index
i10 Index
Citation Counts
18
25
1,526
* Total H IndexRankings
Ranking Based On Selection: 14
Spatial Hydrology
Climate Change
Water Accounting
Land and Water Management
Earth Observation
Metrics
H-Index
i10 Index
Citation Counts
16
21
1,182
* Total H IndexRankings
Ranking Based On Selection: 15
Climate smart agribusiness
farmer collectives
climate change
food systems
Metrics
H-Index
i10 Index
Citation Counts
16
21
1,297
* Total H IndexRankings
Ranking Based On Selection: 16
Environmental Sciences
waste management
Environmental Geochemistry
Metrics
H-Index
i10 Index
Citation Counts
15
20
1,732
* Total H IndexRankings
Ranking Based On Selection: 17
Water resources
Agriculture
Environment
Climate Change
Metrics
H-Index
i10 Index
Citation Counts
15
19
1,472
* Total H IndexRankings
Ranking Based On Selection: 18
Water Resources Management
Remote Sensing
GIS
Metrics
H-Index
i10 Index
Citation Counts
15
28
944
* Total H IndexRankings
Ranking Based On Selection: 19
Institutions
policy
governance
climate change adaptation
irrigation
Metrics
H-Index
i10 Index
Citation Counts
15
21
885
* Total H IndexRankings
Ranking Based On Selection: 20
Irrigation and Water Management
Crop and Environmental Modelling
Climate change
Metrics
H-Index
i10 Index
Citation Counts
14
19
676
* Total H IndexRankings
Ranking Based On Selection: 21
Water and Environment
Metrics
H-Index
i10 Index
Citation Counts
14
20
773
* Total H IndexRankings
Ranking Based On Selection: 22
water governance
transdisciplinarity
climate change
community-based approaches to water
Metrics
H-Index
i10 Index
Citation Counts
14
19
840
* Total H IndexRankings
Ranking Based On Selection: 23
Water Resource Management
Hydrology
Aquatic Ecology
Metrics
H-Index
i10 Index
Citation Counts
13
18
805
* Total H IndexRankings
Ranking Based On Selection: 24
Environmental Engineering
Metrics
H-Index
i10 Index
Citation Counts
13
15
2,395
* Total H IndexRankings
Ranking Based On Selection: 25
Microplastics
Emerging Contaminants
Environmental Chemistry
Pollution Remediation
Metrics
H-Index
i10 Index
Citation Counts
12
15
633
Aditi Mukherji
Metrics
H-Index
i10-Index
Citation Counts
41
83
11,128
climate change
adaptation
groundwater
energy
agri-food systems
Munir A Hanjra
Metrics
H-Index
i10-Index
Citation Counts
38
64
10,896
Climate change
water policy
food security
poverty
energ economics
Avanthi Deshani Igalavithana
University of Peradeniya
Peradeniya, Sri Lanka
Metrics
H-Index
i10-Index
Citation Counts
36
46
5,565
Environmental Soil Science
Gayan Bowatte
University of Peradeniya
Peradeniya, Sri Lanka
Metrics
H-Index
i10-Index
Citation Counts
33
64
5,845
Air pollution
Epidemiology
Santosh Nepal
Metrics
H-Index
i10-Index
Citation Counts
33
51
6,312
Hydrology
Climate change impacts
Cryosphere
Water-Food Nexus
climate resilient Systems
Jagath Manatunge
University of Moratuwa
Moratuwa, Sri Lanka
Metrics
H-Index
i10-Index
Citation Counts
30
49
3,948
Environmental Engineering
Environmental Management
Ecological Engineering
Civil Engineering
Sssivakumar
University of Jaffna
Jaffna, Sri Lanka
Metrics
H-Index
i10-Index
Citation Counts
28
84
2,499
Water Resource
Civil Engineering
Conflict Resolution
Project Management
IWRM
Rachael Mcdonnell
Metrics
H-Index
i10-Index
Citation Counts
27
52
21,171
drought
water
climate change
policy
Meron Teferi Taye
Metrics
H-Index
i10-Index
Citation Counts
21
32
1,789
Climate change/variability
hydrological modeling
hydrological extremes
water security
water management
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Nadeeshani Nanayakkara
University of Peradeniya
Peradeniya, Sri Lanka
Metrics
H-Index
i10-Index
Citation Counts
18
31
1,243
Environmental Engineering
Mahesh Jampani|Jampani Mahesh, J Mahesh, M Jampani
Metrics
H-Index
i10-Index
Citation Counts
18
22
841
Water Resources
Environmental Pollution
Climate Change
Planetary Health
Remote Sensing
Lal Muthuwatta
Metrics
H-Index
i10-Index
Citation Counts
18
25
1,526
Hydrological modeling
Climate Change
Remote Sensing
Komlavi Akpoti
Metrics
H-Index
i10-Index
Citation Counts
16
21
1,182
Spatial Hydrology
Climate Change
Water Accounting
Land and Water Management
Earth Observation
Mohamed Esham
Sabaragamuwa University
Sendai, Sri Lanka
Metrics
H-Index
i10-Index
Citation Counts
16
21
1,297
Climate smart agribusiness
farmer collectives
climate change
food systems
Sunethra Kanthi Gunatilake
Sabaragamuwa University
Sendai, Sri Lanka
Metrics
H-Index
i10-Index
Citation Counts
15
20
1,732
Environmental Sciences
waste management
Environmental Geochemistry
Nishadi Eriyagama
Metrics
H-Index
i10-Index
Citation Counts
15
19
1,472
Water resources
Agriculture
Environment
Climate Change
Ndk Dayawansa
University of Peradeniya
Peradeniya, Sri Lanka
Metrics
H-Index
i10-Index
Citation Counts
15
28
944
Water Resources Management
Remote Sensing
GIS
Ram Bastakoti
Metrics
H-Index
i10-Index
Citation Counts
15
21
885
Institutions
policy
governance
climate change adaptation
irrigation
MHJP Gunarathna
Rajarata University
Mihintale, Sri Lanka
Metrics
H-Index
i10-Index
Citation Counts
14
19
676
Irrigation and Water Management
Crop and Environmental Modelling
Climate change
Gemunu Herath
University of Peradeniya
Peradeniya, Sri Lanka
Metrics
H-Index
i10-Index
Citation Counts
14
20
773
Water and Environment
Inga Jacobs-Mata
Metrics
H-Index
i10-Index
Citation Counts
14
19
840
water governance
transdisciplinarity
climate change
community-based approaches to water
Tilak Priyadarshana Dodampe Gamage
University of Ruhuna
Matara and Galle, Sri Lanka
Metrics
H-Index
i10-Index
Citation Counts
13
18
805
Water Resource Management
Hydrology
Aquatic Ecology
Mahesh Jayaweera
University of Moratuwa
Moratuwa, Sri Lanka
Metrics
H-Index
i10-Index
Citation Counts
13
15
2,395
Environmental Engineering
Kushani Mahatantila
Industrial Technology Institute
Colombo, Sri Lanka
Metrics
H-Index
i10-Index
Citation Counts
12
15
633
Microplastics
Emerging Contaminants
Environmental Chemistry
Pollution Remediation