Citation Rankings
Highly Cited Researchers
University West Highly Cited Researchers CitationEngineering & Technology / Environmental Science & Engineering Rankings (Sort by last 6 years Citation Index) 2025
Citation Rankings (Highly Cited Researchers) and the list of the most cited and influential researchers cover a wide range of scientific fields, spanning 197 main and sub-disciplines, as well as the Art and Humanities Citation Rankings and Social Sciences and Humanities Citation Rankings, offering a unique service. Additionally, the list without CERN, Statistical Data, etc., provided exclusively by “AD Scientific Index”, is part of our effort to balance the situation created by CERN and researchers with statistical data, who have an advantage over others, especially those in the social and humanities fields. There should be new regulations for multi-author and CERN papers. Citation lists also reveal many rule violations and unethical practices. See also for more specific citation analyses: Scientists Last 6 years Citation Index, Universities Total Citations Rankings 2025 and Universities Last 6 Years Citations Rankings 2025
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :1
Materials Science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,948
5,509
0.395
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :2
Symbioses
fungi
evolutionary biology
ecology
systematics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,509
3,349
0.231
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :3
Water Management
Ecological economics
political ecology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,427
3,257
0.736
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :4
Herpetofauna health
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,956
2,691
0.543
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :5
environmental engineering
environmental microbiology
water infrastructure
antibiotic resistance
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,858
2,616
0.915
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :6
Environmental Assessment
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,789
2,362
0.623
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :7
Physical Hydrology
Water Quality
Watershed Management
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,349
2,287
0.683
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :8
Sustainability
environmental management
climate change mitigation and adaptation strategies
water resources management
built
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,109
2,265
0.551
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :9
land and water management
environmental management
agri-food systems
GIS and remote sensing
Environmental change
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,703
1,903
0.704
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :10
air quality
air quality management
air pollution
environmental policy
carbon management
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,538
1,460
0.413
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :11
ice nucleation
climate
aerosol
cloud
freezing
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,930
1,124
0.582
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :12
Environmental Science
Atmospheric Science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,814
1,108
0.611
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :13
Savanna Ecology
Community Ecology
Forbs
Herbivory
Mopane
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,513
1,107
0.732
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :14
soil microbiology
microbial ecology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,233
920
0.746
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :15
Water Resources Management
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,519
670
0.441
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :16
Chemistry
Atmospheric science
Climatology
Environmental science
Systems engineering
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,118
668
0.597
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :17
water microbiology
recreational waters
Legionella
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,369
487
0.356
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :18
Wastewater Treatment
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
697
484
0.694
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :19
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,366
465
0.340
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :20
Environmental and development economics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
634
449
0.708
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :21
Herpatofaunal and bird haemoparasite taxonomy and phylogeny
conservation biology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
603
444
0.736
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :22
Environmental Management
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
491
420
0.855
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :23
water-climate interactions
particulate matter
toxic metals
water security
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
709
393
0.554
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :24
Environmental Technology
Wastewater Treatment
Waste Management
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
668
381
0.570
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :25
Biosystems Engineering
Environmental Engineering
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
464
344
0.741
* Last 6 Years Citation Counts Rankings
Rankings
78,103
29,020
35
Ranking Based On Selection: 1
Ayyakkannu Manivannan
West Virginia University
Morgantown, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,948
5,509
0.395
* Last 6 Years Citation Counts Rankings
Rankings
143,866
50,351
72
Ranking Based On Selection: 2
Joseph Morton
West Virginia University
Morgantown, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,509
3,349
0.231
Symbioses
fungi
evolutionary biology
ecology
systematics
* Last 6 Years Citation Counts Rankings
Rankings
148,504
11,633
43
Ranking Based On Selection: 3
Chad Staddon
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,427
3,257
0.736
Water Management
Ecological economics
political ecology
* Last 6 Years Citation Counts Rankings
Rankings
184,088
795
39
Ranking Based On Selection: 4
Ché Weldon
North West University
Potchefstroom, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,956
2,691
0.543
* Last 6 Years Citation Counts Rankings
Rankings
189,728
64,261
96
Ranking Based On Selection: 5
Emily Garner
West Virginia University
Morgantown, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,858
2,616
0.915
environmental engineering
environmental microbiology
water infrastructure
antibiotic resistance
* Last 6 Years Citation Counts Rankings
Rankings
211,502
928
47
Ranking Based On Selection: 6
Francois Retief
North West University
Potchefstroom, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,789
2,362
0.623
Environmental Assessment
* Last 6 Years Citation Counts Rankings
Rankings
218,822
73,050
108
Ranking Based On Selection: 7
Jason Hubbart
West Virginia University
Morgantown, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,349
2,287
0.683
Physical Hydrology
Water Quality
Watershed Management
* Last 6 Years Citation Counts Rankings
Rankings
221,018
16,498
54
Ranking Based On Selection: 8
Colin Booth
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,109
2,265
0.551
Sustainability
environmental management
climate change mitigation and adaptation strategies
water resources management
built
* Last 6 Years Citation Counts Rankings
Rankings
263,548
6
6
Ranking Based On Selection: 9
David Oscar Yawson
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,703
1,903
0.704
land and water management
environmental management
agri-food systems
GIS and remote sensing
Environmental change
* Last 6 Years Citation Counts Rankings
Rankings
337,270
23,585
76
Ranking Based On Selection: 10
James WS Longhurst
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,538
1,460
0.413
air quality
air quality management
air pollution
environmental policy
carbon management
* Last 6 Years Citation Counts Rankings
Rankings
420,629
130,238
6
Ranking Based On Selection: 11
Naruki Hiranuma
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,930
1,124
0.582
ice nucleation
climate
aerosol
cloud
freezing
* Last 6 Years Citation Counts Rankings
Rankings
425,393
131,547
7
Ranking Based On Selection: 12
Erik Crosman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,814
1,108
0.611
Environmental Science
Atmospheric Science
* Last 6 Years Citation Counts Rankings
Rankings
425,742
2,028
96
Ranking Based On Selection: 13
Frances Siebert
North West University
Potchefstroom, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,513
1,107
0.732
Savanna Ecology
Community Ecology
Forbs
Herbivory
Mopane
* Last 6 Years Citation Counts Rankings
Rankings
489,141
2,368
119
Ranking Based On Selection: 14
Sarina Claassens
North West University
Potchefstroom, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,233
920
0.746
soil microbiology
microbial ecology
* Last 6 Years Citation Counts Rankings
Rankings
602,985
23
21
Ranking Based On Selection: 15
Adrian Cashman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,519
670
0.441
Water Resources Management
* Last 6 Years Citation Counts Rankings
Rankings
604,214
3,054
160
Ranking Based On Selection: 16
Andrew D Venter
North West University
Potchefstroom, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,118
668
0.597
Chemistry
Atmospheric science
Climatology
Environmental science
Systems engineering
* Last 6 Years Citation Counts Rankings
Rankings
719,452
5,435
129
Ranking Based On Selection: 17
Athena Mavridou
University of West Attica
Egaleo, Greece
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,369
487
0.356
water microbiology
recreational waters
Legionella
* Last 6 Years Citation Counts Rankings
Rankings
722,226
206,334
18
Ranking Based On Selection: 18
Erick Butler
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
697
484
0.694
* Last 6 Years Citation Counts Rankings
Rankings
737,425
31
28
Ranking Based On Selection: 19
Emma Smith
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,366
465
0.340
* Last 6 Years Citation Counts Rankings
Rankings
751,443
212,771
420
Ranking Based On Selection: 20
Suhyun Jung
West Virginia University
Morgantown, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
634
449
0.708
Environmental and development economics
* Last 6 Years Citation Counts Rankings
Rankings
755,978
4,021
220
Ranking Based On Selection: 21
Courtney Cook
North West University
Potchefstroom, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
603
444
0.736
Herpatofaunal and bird haemoparasite taxonomy and phylogeny
conservation biology
* Last 6 Years Citation Counts Rankings
Rankings
778,280
4,149
231
Ranking Based On Selection: 22
Dirk Cilliers
North West University
Potchefstroom, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
491
420
0.855
Environmental Management
* Last 6 Years Citation Counts Rankings
Rankings
805,469
4,343
252
Ranking Based On Selection: 23
Nnenesi Kgabi
North West University
Potchefstroom, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
709
393
0.554
water-climate interactions
particulate matter
toxic metals
water security
* Last 6 Years Citation Counts Rankings
Rankings
818,621
92
85
Ranking Based On Selection: 24
Trina Halfhide
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
668
381
0.570
Environmental Technology
Wastewater Treatment
Waste Management
* Last 6 Years Citation Counts Rankings
Rankings
862,314
235,374
9
Ranking Based On Selection: 25
Fernando Rojano Aguilar
West Virginia State University
Institute, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
464
344
0.741
Biosystems Engineering
Environmental Engineering