Productivity Rankings is a unique service offered only by “AD Scientific Index”. This is a ranking system derived from the i10 index in order to show the productivity of the scientist in publishing scientific articles of value. Productivity Rankings is an instrument that lists productive scientists in a given area, discipline, university, and country and can guide the development of meaningful incentives and academic policies. The world rankings, regional rankings, and university rankings of scientists in this table are developed based on the total i10 index. Additionally, click to view the special rankings based on Productivity Rankings: Scientists Last 6 years' i10 Index", Universities Total i10 Index Rankings 2025, Universities Last 6 Years i10 Index Rankings 2025 "Art and Humanities i10 Productivity Rankings" and "Social Sciences and Humanities i10 Productivity Rankings".
* Last 6 Years i10 IndexRankings
Ranking Based On Selection :1
Limnology
Ecotoxicology
Integrated Water Resource Management
Water Ecosystem Services
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
78
52
0.667
* Last 6 Years i10 IndexRankings
Ranking Based On Selection :2
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
52
32
0.615
* Last 6 Years i10 IndexRankings
Ranking Based On Selection :3
Climate change
Natural resource conservation
Rural livelihoods
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
27
23
0.852
* Last 6 Years i10 IndexRankings
Ranking Based On Selection :4
Disaster Risk Reduction
Ecosystem-based Disaster Risk Reduction and Climate Change Adaptation
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
17
16
0.941
* Last 6 Years i10 IndexRankings
Ranking Based On Selection :5
International migration
vulnerability and resilience disaster management
gender and climate change
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
10
10
1.000
* Last 6 Years i10 IndexRankings
Ranking Based On Selection :6
population and environment
environmental sociology
unconventional gas mining
hydraulic fracturing
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
14
7
0.500
* Last 6 Years i10 IndexRankings
Ranking Based On Selection :7
Environmental Management scientist
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
6
6
1.000
* Last 6 Years i10 IndexRankings
Ranking Based On Selection :8
Geology
Environmental science
mine waste characterization
revalorization
geomicrobiology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
5
5
1.000
Paul J Oberholster
University of the Free State
Bloemfontein, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
78
52
0.667
Limnology
Ecotoxicology
Integrated Water Resource Management
Water Ecosystem Services
G Osthoff
University of the Free State
Bloemfontein, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
52
32
0.615
Geoffrey Mukwada
University of the Free State
Bloemfontein, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
27
23
0.852
Climate change
Natural resource conservation
Rural livelihoods
Johanes Belle
University of the Free State
Bloemfontein, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
17
16
0.941
Disaster Risk Reduction
Ecosystem-based Disaster Risk Reduction and Climate Change Adaptation
Alice Ncube
University of the Free State
Bloemfontein, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
10
10
1.000
International migration
vulnerability and resilience disaster management
gender and climate change
Nola Redelinghuys
University of the Free State
Bloemfontein, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
14
7
0.500
population and environment
environmental sociology
unconventional gas mining
hydraulic fracturing
Ernestine Alabaroaye Atangana
University of the Free State
Bloemfontein, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
6
6
1.000
Environmental Management scientist
Alba Gómez-Arias
University of the Free State
Bloemfontein, South Africa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
5
5
1.000
Geology
Environmental science
mine waste characterization
revalorization
geomicrobiology