1. Department of Surveying Engineering, College of Engineering and Technology, Mizan tepi University, Tepi, Ethiopia
2. Department of Geography and Environmental Studies, College of Social Science, Arba Minch University, Arba Minch, Ethiopia
3. Department of Biology, College of Natural science, Wolaita-Sodo University, Sodo, Ethiopia
4. Department of Geography and Environmental Studies, College of Social Science, Dilla University, Dilla, Ethiopia