Volume 4, Issue 3, September 2018, Page: 80-90
Morphometric Analysis of Kito and Awetu Sub Basins Jimma, Ethiopia
Fayera Gudu Tufa, Hydraulic and Water Resources Engineering, Civil and Environmental Engineering, Jimma Institute of Technology, Jimma University, Jimma, Ethiopia
Tolera Abdissa Feyissa, Hydraulic and Water Resources Engineering, Civil and Environmental Engineering, Jimma Institute of Technology, Jimma University, Jimma, Ethiopia
Received: Sep. 10, 2018;       Accepted: Oct. 22, 2018;       Published: Nov. 14, 2018
DOI: 10.11648/j.ajwse.20180403.14      View  95      Downloads  11
Abstract
Morphometric analysis is very important to evaluate watershed characteristics. Watershed characteristics are essential in watershed management, site selection for water resource projects, groundwater evaluation and proposing flood control measures. The present study aimed the morphometric analysis of Kito and Awetu sub-basins which drain into Kito and Awetu Rivers. Both rivers merge into a single river in Jimma town which is subjected to flood and sediment generated from both sub-basins. Topographic map of scale 1:50,000 was obtained from Ethiopian National Mapping Agency and satellite image of digital elevation model of fine resolution (12.5m x12.5m) was downloaded and used for morphometric analysis. GIS and remote sensing technique have been employed to generate and quantify morphometric parameters. Twenty-six parameters under linear aspects, areal aspects, and relief aspects were evaluated to characterize both Kito and Awetu sub-basins. Kito and Awetu Sub basins have both 5th order stream and the 1st order encompasses 78% and 77% of total stream number respectively which indicates the presence of flashy flood. The drainage area, basin perimeter, stream length and weighted mean bifurcation is 113.21km2, 82.65km, 270.33km, and 4.51 respectively for Kito sub-basin and 77.17km2, 73.58km, 192.45km, and 4.45 respectively for Awetu sub-basin. The values indicate that both sub-basins are characterized by mountainous, steep slope and mostly homogeneous geologic materials. The elongation ratio of Kito and Awetu sub-basins are 0.62 and 0.64 respectively. Kito and Awetu sub-basins are both elongated and the rivers have slow hydrograph for a long time. Relatively, Awetu sub-basin is more elongated than Kito sub-basin. The study reveals that both sub-basins are susceptible to surface runoff and soil erosion but the rivers are long and easy to manage flood occurrence.
Keywords
Awetu Sub Basin, GIS, Kito Sub Basin, Morphometric Analysis, Remote Sensing
To cite this article
Fayera Gudu Tufa, Tolera Abdissa Feyissa, Morphometric Analysis of Kito and Awetu Sub Basins Jimma, Ethiopia, American Journal of Water Science and Engineering. Vol. 4, No. 3, 2018, pp. 80-90. doi: 10.11648/j.ajwse.20180403.14
Copyright
Copyright © 2018 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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