Engineering & Technology
ASEAN Engineering & Technology / Environmental Science & Engineering 1.506 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 Feb 01, 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 (870.053) 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
Environmental microbiology and biotechnology
MBR
Biological wastewater treatment
Metrics
H-Index
i10 Index
Citation Counts
100
320
38,519
* Total H IndexRankings
Ranking Based On Selection: 2
Environmental engineering
water
reuse
solid waste
recycling
Metrics
H-Index
i10 Index
Citation Counts
95
278
39,765
* Total H IndexRankings
Ranking Based On Selection: 3
Pyrolysis
Microwave Pyrolysis
Waste and Biomass Recovery
Water & Wastewater Treatment
Biochar
Metrics
H-Index
i10 Index
Citation Counts
90
423
29,816
* Total H IndexRankings
Ranking Based On Selection: 4
Water resources
Climate Change
Statistical hydrology
Groundwater hydrology
Hydrological
Metrics
H-Index
i10 Index
Citation Counts
89
336
23,690
* Total H IndexRankings
Ranking Based On Selection: 5
Environmental engineering
Metrics
H-Index
i10 Index
Citation Counts
89
610
41,623
* Total H IndexRankings
Ranking Based On Selection: 6
Hydrogen
Catalysis
Reforming
Photocatalysis
Fischer-Tropsch synthesis
Metrics
H-Index
i10 Index
Citation Counts
84
391
27,377
* Total H IndexRankings
Ranking Based On Selection: 7
Environmental Engineering
Environmental Science
Chemical Engineering
Nanomaterials
Metrics
H-Index
i10 Index
Citation Counts
83
192
24,431
* Total H IndexRankings
Ranking Based On Selection: 8
Cardiovascular diseases
Air pollution
Meta-analysis
Metrics
H-Index
i10 Index
Citation Counts
77
188
27,054
* Total H IndexRankings
Ranking Based On Selection: 9
Biopolymers
Composite Biomaterials
Activated Carbon
Adsorption
Response Surface Methodology
Metrics
H-Index
i10 Index
Citation Counts
70
151
11,743
* Total H IndexRankings
Ranking Based On Selection: 10
Water Resources
Optimization Model
Dam Operation
Artificial Neural network
Metrics
H-Index
i10 Index
Citation Counts
70
301
18,248
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* Total H IndexRankings
Ranking Based On Selection: 11
Bioprocessing
Biorefinery
Food processing
Microalgae technology
Sustainability
Metrics
H-Index
i10 Index
Citation Counts
69
182
16,502
* Total H IndexRankings
Ranking Based On Selection: 12
environmental engineering
Metrics
H-Index
i10 Index
Citation Counts
69
189
17,094
* Total H IndexRankings
Ranking Based On Selection: 13
Environmental Engineering
Membrane Separation
Environmental Nanotechnology
Water and Desalination
Environmental Materials
Metrics
H-Index
i10 Index
Citation Counts
69
173
17,359
* Total H IndexRankings
Ranking Based On Selection: 14
wastewater treatment
recreational water quality
public health
environmental microbiology
biofilms
Metrics
H-Index
i10 Index
Citation Counts
67
161
16,092
* Total H IndexRankings
Ranking Based On Selection: 15
Environmental Science and Engineering
Metrics
H-Index
i10 Index
Citation Counts
64
239
13,674
* Total H IndexRankings
Ranking Based On Selection: 16
Water and Wastewater Treatment
Water Reuse
Membrane Technology
Green Infrastructure
Metrics
H-Index
i10 Index
Citation Counts
63
148
11,775
* Total H IndexRankings
Ranking Based On Selection: 17
Environmental Engineering
membrane technology
solid waste managment
Metrics
H-Index
i10 Index
Citation Counts
62
185
12,457
* Total H IndexRankings
Ranking Based On Selection: 18
Water and Wastewater Treatment
Waste Treatment
Metrics
H-Index
i10 Index
Citation Counts
58
167
11,614
* Total H IndexRankings
Ranking Based On Selection: 19
Bioprocessing and Biomanufacturing
Metrics
H-Index
i10 Index
Citation Counts
58
226
11,852
* Total H IndexRankings
Ranking Based On Selection: 20
Environmental governance
climate change adaptation
sustainability science
knowledge systems
narratives
Metrics
H-Index
i10 Index
Citation Counts
55
159
23,590
* Total H IndexRankings
Ranking Based On Selection: 21
Environment
Optimization
Applied Math
Metrics
H-Index
i10 Index
Citation Counts
55
137
11,562
* Total H IndexRankings
Ranking Based On Selection: 22
Environmental Science/Chemistry
Metrics
H-Index
i10 Index
Citation Counts
53
164
12,232
* Total H IndexRankings
Ranking Based On Selection: 23
Environmental Engineering
Water and Wastewater Treatment
Solid Waste Management
Metrics
H-Index
i10 Index
Citation Counts
53
163
14,658
* Total H IndexRankings
Ranking Based On Selection: 24
Indoor Air Quality
building performance
energy
indoor environment
Metrics
H-Index
i10 Index
Citation Counts
53
121
10,814
* Total H IndexRankings
Ranking Based On Selection: 25
Environment and development
particularly low latitudes
Metrics
H-Index
i10 Index
Citation Counts
53
118
10,683
Yu Liu
Nanyang Technological University
Jurong West, Singapore
Metrics
H-Index
i10-Index
Citation Counts
100
320
38,519
Environmental microbiology and biotechnology
MBR
Biological wastewater treatment
Shane A Snyder
Nanyang Technological University
Jurong West, Singapore
Metrics
H-Index
i10-Index
Citation Counts
95
278
39,765
Environmental engineering
water
reuse
solid waste
recycling
Su Shiung Lam 蓝世雄
Universiti Malaysia Terengganu
Kuala Terengganu, Malaysia
Metrics
H-Index
i10-Index
Citation Counts
90
423
29,816
Pyrolysis
Microwave Pyrolysis
Waste and Biomass Recovery
Water & Wastewater Treatment
Biochar
Shamsuddin Shahid
Metrics
H-Index
i10-Index
Citation Counts
89
336
23,690
Water resources
Climate Change
Statistical hydrology
Groundwater hydrology
Hydrological
Hamidi Abdul Aziz
Universiti Sains Malaysia
Penang, Malaysia
Metrics
H-Index
i10-Index
Citation Counts
89
610
41,623
Environmental engineering
Dai Viet N Vo
Nguyen Tat Thanh University
Ho Chi Minh City, Vietnam
Metrics
H-Index
i10-Index
Citation Counts
84
391
27,377
Hydrogen
Catalysis
Reforming
Photocatalysis
Fischer-Tropsch synthesis
Teik Thye Lim
Nanyang Technological University
Jurong West, Singapore
Metrics
H-Index
i10-Index
Citation Counts
83
192
24,431
Environmental Engineering
Environmental Science
Chemical Engineering
Nanomaterials
Wilson Tam
National University of Singapore
Queenstown, Singapore
Metrics
H-Index
i10-Index
Citation Counts
77
188
27,054
Cardiovascular diseases
Air pollution
Meta-analysis
Ali H Jawad
Universiti Teknologi MARA
Shah Alam, Malaysia
Metrics
H-Index
i10-Index
Citation Counts
70
151
11,743
Biopolymers
Composite Biomaterials
Activated Carbon
Adsorption
Response Surface Methodology
Ahmed El Shafie
University of Malaya
Kuala Lumpur, Malaysia
Metrics
H-Index
i10-Index
Citation Counts
70
301
18,248
Water Resources
Optimization Model
Dam Operation
Artificial Neural network
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Kit Wayne Chew
Metrics
H-Index
i10-Index
Citation Counts
69
182
16,502
Bioprocessing
Biorefinery
Food processing
Microalgae technology
Sustainability
Wunjern Ng
Nanyang Technological University
Jurong West, Singapore
Metrics
H-Index
i10-Index
Citation Counts
69
189
17,094
environmental engineering
Darren Delai Sun
Nanyang Technological University
Jurong West, Singapore
Metrics
H-Index
i10-Index
Citation Counts
69
173
17,359
Environmental Engineering
Membrane Separation
Environmental Nanotechnology
Water and Desalination
Environmental Materials
Stefan Wuertz
Nanyang Technological University
Jurong West, Singapore
Metrics
H-Index
i10-Index
Citation Counts
67
161
16,092
wastewater treatment
recreational water quality
public health
environmental microbiology
biofilms
Jun Wei Lim
Metrics
H-Index
i10-Index
Citation Counts
64
239
13,674
Environmental Science and Engineering
Say Leong Ong
National University of Singapore
Queenstown, Singapore
Metrics
H-Index
i10-Index
Citation Counts
63
148
11,775
Water and Wastewater Treatment
Water Reuse
Membrane Technology
Green Infrastructure
Visvanathan C
Asian Institute of Technology Thailand
Klong Luang, Thailand
Metrics
H-Index
i10-Index
Citation Counts
62
185
12,457
Environmental Engineering
membrane technology
solid waste managment
Yan Zhou
Nanyang Technological University
Jurong West, Singapore
Metrics
H-Index
i10-Index
Citation Counts
58
167
11,614
Water and Wastewater Treatment
Waste Treatment
Arbakariya B Ariff
Universiti Putra Malaysia
Seri Kembangan, Malaysia
Metrics
H-Index
i10-Index
Citation Counts
58
226
11,852
Bioprocessing and Biomanufacturing
Louis Lebel
Chiang Mai University
Chiang Mai, Thailand
Metrics
H-Index
i10-Index
Citation Counts
55
159
23,590
Environmental governance
climate change adaptation
sustainability science
knowledge systems
narratives
Christine A Shoemaker
National University of Singapore
Queenstown, Singapore
Metrics
H-Index
i10-Index
Citation Counts
55
137
11,562
Environment
Optimization
Applied Math
Krishna Kumar Yadav
Metrics
H-Index
i10-Index
Citation Counts
53
164
12,232
Environmental Science/Chemistry
Mohamed Hasnain Isa
Metrics
H-Index
i10-Index
Citation Counts
53
163
14,658
Environmental Engineering
Water and Wastewater Treatment
Solid Waste Management
Tham Kwok Wai
National University of Singapore
Queenstown, Singapore
Metrics
H-Index
i10-Index
Citation Counts
53
121
10,814
Indoor Air Quality
building performance
energy
indoor environment
David Taylor
National University of Singapore
Queenstown, Singapore
Metrics
H-Index
i10-Index
Citation Counts
53
118
10,683
Environment and development
particularly low latitudes