1. a Department of Agricultural Engineering, Faculty of Technology, Wollega University Shambu campus, Shambu, Ethiopia
2. b Department of Earth Sciences, College of Natural and Computational Sciences, Wollega University Nekemte Campus, Nekemte, Ethiopia
3. c Department of Geography and Environmental Studies, Raya University, Maichew, Ethiopia
4. d Department of Fisheries and Aquatic Sciences, Faculty of Agriculture, Wollega University Shambu campus, Shambu, Ethiopia
5. e Department of Natural Resource Management, College of Agriculture and Veterinary Medicine, Jimma University, Jimma, Ethiopia