Shimelash Molla Kassaye | Environmental Science | Editorial Board Member

Dr. Shimelash Molla Kassaye | Environmental Science | Editorial Board Member

Mattu University | Ethiopia

Dr. Shimelash Molla Kassaye is a highly dedicated scholar and researcher specializing in Hydrology and Water Resources Management, with an extensive academic background and a strong record of scientific contributions in the field of environmental and water sciences. He currently serves as an Assistant Professor at Mattu University, Ethiopia, where he continues to advance research and teaching in hydrology, climate change, and watershed management. His professional journey reflects consistent excellence and commitment to solving pressing environmental and water-related challenges affecting the African continent. Dr. Kassaye earned his Ph.D. in Water Management (Hydrology and Water Resources Management) from the African Centre of Excellence in Water Management (ACEWM) at Addis Ababa University in 2024. His doctoral research, titled “Evaluating the Hydrological Dynamics under Land Use/Cover and Climate Change in the Baro River Basin, Ethiopia,” focused on understanding the complex interactions between climate variability, land use change, and hydrological responses in one of Ethiopia’s key river basins. His research offers vital insights into sustainable water resource management and policy planning under changing climatic conditions. Prior to his Ph.D., he obtained an M.Sc. in Hydraulic Engineering from Jimma University in 2017 with an outstanding CGPA of 3.88/4.00 and a B.Sc. in Hydraulic and Water Resources Engineering from Arbaminch University in 2011. His professional experience spans over a decade of teaching, research, and academic service. Before assuming his current position, Dr. Kassaye worked as a Researcher and Lecturer at Mattu University (2014–2021) and as a Graduate Assistant at Arbaminch University (2012–2014). Through these roles, he has contributed significantly to the training of young engineers and scientists, supervising research projects, and integrating innovative technologies into water resource education and management practices. Dr. Kassaye’s research expertise covers a broad range of topics, including hydrologic modeling, climate change and variability, drought monitoring and prediction, integrated watershed management, natural resource management, and hydrometeorological risk assessment. His multidisciplinary approach, combining remote sensing, geospatial analysis, and hydrological modeling, enables comprehensive assessments of environmental systems under stress from both natural and anthropogenic factors. He has published multiple peer-reviewed scientific papers in high-impact international journals such as Water, Environmental Earth Sciences, Environmental Systems Research, and Earth. His publications have explored critical themes such as the sensitivity of meteorological dynamics to catchment variability, the integrated impact of land use and topography on hydrological extremes, and the quantification of climate change effects on streamflow dynamics. His academic excellence, combined with practical expertise and a strong publication record, positions him as a leading early-career researcher contributing to Ethiopia’s and Africa’s sustainable water resource management efforts. His dedication to advancing hydrological science underscores his commitment to building climate resilience and fostering sustainable development in vulnerable regions.

Profiles: Orcid | Google Scholar

Featured Publications

Kassaye, S. M., Tadesse, T., Tegegne, G., & Hordofa, A. T. (2024). Quantifying the climate change impacts on the magnitude and timing of hydrological extremes in the Baro River Basin, Ethiopia. Environmental Systems Research, 13(1), 1–15.

Belay, H., Melesse, A. M., Tegegne, G., & Kassaye, S. M. (2025). Flood inundation mapping using the Google Earth Engine and HEC-RAS under land use/land cover and climate changes in the Gumara Watershed, Upper Blue Nile Basin, Ethiopia. Remote Sensing, 17(7), 1283.

Malede, D. A., Elumalai, V., Andualem, T. G., Mekonnen, Y. G., Yibeltal, M., Kassaye, S. M., & others. (2025). Understanding flood and drought extremes under a changing climate in the Blue Nile Basin: A review. Environmental and Sustainability Indicators, 100638.

Kassaye, S. M., Tadesse, T., & Tegegne, G. (2024). Quantifying the climate change impacts on the magnitude and timing of hydrological extremes in the Baro River Basin, Ethiopia. Environmental Systems Research, 13(2).

Kassaye, S. M., Tadesse, T., Tegegne, G., Hordofa, A. T., & Malede, D. A. (2024). Relative and combined impacts of climate and land use/cover change for the streamflow variability in the Baro River Basin (BRB). Earth, 5(2), 149–168.

Kassaye, S. M., Tadesse, T., Tegegne, G., & Tadesse, K. E. (2022). The sensitivity of meteorological dynamics to the variability in catchment characteristics. Water, 14(22), 3776.

Kassaye, S. M., Tadesse, T., Tegegne, G., & Hordofa, A. T. (2024). Integrated impact of land use/cover and topography on hydrological extremes in the Baro River Basin. Environmental Earth Sciences, 83(2), 49.

Kassaye, S. M., Ebissa, T. N., Gutema, B. G., & Gurmesa, G. T. (2020). Site selection and design of mini hydropower plant for rural electrification in Keber River. American Journal of Electrical Power and Energy Systems, 9(5), 82–96.

Ebissa, T. N., Kassaye, S. M., & Malede, D. A. (2024). Hydrological response to climate change in Baro Basin, Ethiopia, using representative concentration pathway scenarios. Environmental Systems Research, 13(1), 42.

Waheed, A., Kousar, S., Khan, M. I., & Fischer, T. B. (2025). Environmental and Sustainability Indicators. Environmental and Sustainability Indicators.

Oliver O Apeh | Renewable energy | Best Researcher Award

Dr. Oliver O Apeh | Renewable energy | Best Researcher Award

Researcher at University of Johannesburg, Nigeria

Dr. Oliver Okechukwu Apeh is a dedicated physicist with a Ph.D. in Physics from the University of Fort Hare, South Africa, focusing on solar photovoltaic systems under varying meteorological conditions. His academic journey includes an M.Sc. in Physics and Astronomy from the University of Nigeria, where he specialized in Solar Energy and Materials Science, and a Postgraduate Certificate in Education from the National Open University of Nigeria. Currently, he lectures on Information Technology at Eduvos Higher Institution in South Africa and serves as a Postdoctoral Research Fellow at the University of Johannesburg. His research interests span data science, machine learning for solar energy, smart energy systems, and the Food-Energy-Water nexus. Dr. Apeh has received numerous awards, including the University of Fort Hare Doctoral Research Award, and is a member of the South African Institute of Physics. His technical skills include proficiency in Python, C++, and various research software. 🧑‍🔬🔋🌍

Professional Profiles:

🎓 Education

Dr. Oliver Okechukwu Apeh has a robust educational background in Physics and Astronomy, with significant achievements in both theoretical and practical aspects of the field. He earned his Ph.D. in Physics from the University of Fort Hare, South Africa, in November 2021, where his thesis focused on the comparative performance of 3-kWp ranges solar photovoltaic systems under varying meteorological conditions in Alice, Eastern Cape Province. He completed his M.Sc. in Physics and Astronomy, specializing in Solar Energy and Materials Science, from the University of Nigeria, Nsukka, in December 2015. His thesis was on the synthesis and characterization of nanostructured zinc oxide thin films using an aqueous chemical method. Additionally, he holds a Postgraduate Certificate in Education (PGCE) with a specialty in Physics Education from the National Open University of Nigeria, completed in December 2014, and a B.Sc. in Physics and Astronomy from the University of Nigeria, Nsukka, obtained in July 2011. 🌞📚

Professional Experience

Dr. Oliver Okechukwu Apeh is an accomplished academic and researcher with a diverse background in teaching and research. He is currently a Lecturer in Information Technology at Eduvos Higher Institution’s Midrand Campus in South Africa, where he teaches Physics and Mathematics and conducts clean energy research. Additionally, he is a Postdoctoral Research Fellow at the University of Johannesburg, focusing on the Food-Energy-Water Nexus and machine learning for solar energy. Dr. Apeh has held various academic roles, including Research Assistant at the University of Fort Hare and Lecturer at NCM Computer and Business Academy. In Nigeria, he served as Head of the Physics Department at St Cyprian’s Special Science School and taught at several secondary schools. His extensive experience also includes working as an Independent Contractor/Consultant in Physics Education and Technical Writing/Editing. 📚🧪🌞

Research Interest

Dr. Oliver Okechukwu Apeh’s research interests span several cutting-edge fields. He focuses on Data Science and Machine Learning applications for solar energy, exploring how artificial intelligence can optimize energy systems. His work on smart energy systems aims to improve efficiency and sustainability. Additionally, Dr. Apeh investigates the Food-Energy-Water nexus, addressing the interconnections between these critical resources. His research is dedicated to advancing technology and methods that contribute to sustainable development and environmental preservation. 🌞💧🌾

Award and Honors

Dr. Oliver Okechukwu Apeh has received several notable awards and honors. He was honored with the University of Fort Hare Doctoral Research Award (May 2017 – Nov. 2021) for his exceptional contributions during his Ph.D. studies. He earned a Certificate of Merit for his outstanding punctuality record at Saint Cyprian’s Science School, Nsukka, in November 2014. Additionally, he was recognized as the Best Science Teacher at Community Secondary School, Aguibeje, Enugu-Ezike, Igbo-Eze North L.G.A, in July 2003. These accolades reflect his dedication and excellence in both academic and teaching roles. 🏆🎓📜

Research Skills

Dr. Oliver Okechukwu Apeh possesses a diverse range of research skills. His expertise includes data science, machine learning for solar energy, and smart energy systems. He is proficient in using Python and C++ for programming and has extensive experience with software like Microsoft Office and SigmaPlot. His research methodologies encompass the Food-Energy-Water nexus and artificial intelligence applications. Additionally, Dr. Apeh has strong communication skills, is highly responsible, and excels in time management. He is known for his leadership and motivational abilities, which complement his technical expertise and research acumen. 🧑‍🔬🔍💻

Publications

  1. The water-energy-food-ecosystem nexus scenario in Africa: Perspective and policy implementations
    • Authors: Apeh, O.O., Nwulu, N.I.
    • Year: 2024
    • Citations: 0
  2. A hybrid solar-biogas system for post-COVID-19 rural energy access
    • Authors: Overen, O.K., Obileke, K., Meyer, E.L., Makaka, G., Apeh, O.O.
    • Year: 2024
    • Citations: 0
  3. Performance evaluation of Bi2O3@GO and Bi2O3@rGO composites electrode for supercapacitor application
    • Authors: Mbam, S.M., Obodo, R.M., Apeh, O.O., Nwulu, N., Ezema, F.I.
    • Year: 2023
    • Citations: 1
  4. Contributions of Solar Photovoltaic Systems to Environmental and Socioeconomic Aspects of National Development—A Review
    • Authors: Apeh, O.O., Meyer, E.L., Overen, O.K.
    • Year: 2022
    • Citations: 20
  5. Modeling and experimental analysis of battery charge controllers for comparing three off-grid photovoltaic power plants
    • Authors: Apeh, O.O., Meyer, E.L., Overen, O.K.
    • Year: 2021
    • Citations: 1
  6. Monthly, seasonal and yearly assessments of global solar radiation, clearness index and diffuse fractions in Alice, South Africa
    • Authors: Apeh, O.O., Overen, O.K., Meyer, E.L.
    • Year: 2021
    • Citations: 25
  7. Electrical and meteorological data acquisition system of a commercial and domestic microgrid for monitoring PV parameters
    • Authors: Meyer, E.L., Apeh, O.O., Overen, O.K.
    • Year: 2020
    • Citations: 10
  8. Properties of nanostructured ZnO thin films synthesized using a modified aqueous chemical growth method
    • Authors: Apeh, O.O., Chime, U.K., Agbo, S., Maaza, M., Ezema, F.I.
    • Year: 2019
    • Citations: 21