Citation Rankings
Highly Cited Researchers

Engineering & Technology / Environmental Science & Engineering Highly Cited Researchers Citation Rankings 2025

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
Tanzania
Karoli N. Njau|Njau Karoli N., Njau Karoli Nicholas
Environmental management
water and wastewater purification
reuse and recycling
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,804
2,308
0.823
* Total Citation Counts Rankings
Ranking Based On Selection: 2
Tanzania
Komakech C. Hans
Water
sanitation
irrigation and management
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,613
1,306
0.810
* Total Citation Counts Rankings
Ranking Based On Selection: 3
Tanzania
Eliakira Kisetu Nassary
Sustainable intensification
Climate change resilience
Carbon sequestration
Urban green (UG) and UG Infrastructure (UGI)
Natu
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
498
398
0.799
* Total Citation Counts Rankings
Ranking Based On Selection: 4
Tanzania
Petro Karungamye
Environmental pollution control
Water and waste water treatment
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
280
279
0.996
* Total Citation Counts Rankings
Ranking Based On Selection: 7
Tanzania
Leticia Kalumbilo
Biology
Biomedical Sciences
Environmental Sciences
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2
2
1.000
* Total Citation Counts Rankings
Rankings
340,886
Tanzania
78
5
Ranking Based On Selection: 1
Karoli N. Njau|Njau Karoli N., Njau Karoli Nicholas
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,804
2,308
0.823
Environmental management
water and wastewater purification
reuse and recycling
* Total Citation Counts Rankings
Rankings
510,929
Tanzania
160
17
Ranking Based On Selection: 2
Komakech C. Hans
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,613
1,306
0.810
* Total Citation Counts Rankings
Rankings
919,450
Tanzania
466
35
Ranking Based On Selection: 3
Eliakira Kisetu Nassary
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
498
398
0.799
Sustainable intensification
Climate change resilience
Carbon sequestration
Urban green (UG) and UG Infrastructure (UGI)
Natu
* Total Citation Counts Rankings
Rankings
1,152,492
Tanzania
797
59
Ranking Based On Selection: 4
Petro Karungamye
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
280
279
0.996
Environmental pollution control
Water and waste water treatment
* Total Citation Counts Rankings
Rankings
1,576,492
Tanzania
1,404
94
Ranking Based On Selection: 5
Edwin Ndibalema Richard
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
102
102
1.000
* Total Citation Counts Rankings
Rankings
2,080,136
Tanzania
2,498
151
Ranking Based On Selection: 6
Alpha Laizer
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
19
19
1.000
* Total Citation Counts Rankings
Rankings
2,341,655
Tanzania
3,331
193
Ranking Based On Selection: 7
Leticia Kalumbilo
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2
2
1.000