Asefa, Taye Habte (2016) The Dynamics of Land use Land cover change on the Stream Flow in Fincha Amerti -Neshe Sub-basin: Abay basin, Ethiopia. Masters thesis, Addis Ababa University.
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Abstract
Fincha Amerti Neshe sub-basin is densely populated causing various effects on resource bases because of deforestation, expansion of residential area, and agricultural land. The sub basin is also facing high erosion by the effects of intense rainfall of the watershed which aggravates the land cover change of the watershed. The objective of this study was to evaluate the dynamics of land use land cover change and its effects on stream flow using SWAT model in Fincha Amerti Neshe watershed. The land use land cover change analyses were performed using ERDAS Imagine 2014 which was used for an input in analysis of SWAT. Land use land cover changes for three different years of 1990, 2000 and 2015 land use scenarios were used for estimation of stream flow. During the study period most parts of the grassland and shrub land were changed to cultivated land. An increase of cultivated land by 18.57% over 25 years period (1990 – 2015) resulted in an increase of stream flow by 13.39m3/s. In Amerti, there was also an increase of cultivated land and wet lands by 15.57%, 15.27% for the periods 1990 – 2000 to 2000-2015 years respectively. On the other hand grasslands were decreased by 10.44% within 10 years period and 11.78 for the 15 year’s period. Moreover, shrub lands and forest showed a significant decrease through the period. i.e Shrub lands showed a higher decrease during the second period from 2000_2015 by -11.13% than the first period from 1990_2000 by -0.84%. The water body becames increased through the decades to promote Fincha reservoir through the tunnel for adding the efficiency of Fincha hydropower. The Nash Sutcliff efficiency, coefficient of determination (R2) and RSR were used for evaluating the model performance. The model results showed a good agreement and correlation with the observed data with NSE > 0.65, R2> 0.84, and RSR < 0.6 values.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Fincha Amerti Neshe watershed, land use change, stream flow, Rainbow, SWAT, ERDAS Imagine. |
| Subjects: | G Geography. Anthropology. Recreation > GE Environmental Sciences Q Science > QE Geology S Agriculture > S Agriculture (General) T Technology > T Technology (General) T Technology > TA Engineering (General). Civil engineering (General) T Technology > TC Hydraulic engineering. Ocean engineering |
| Divisions: | Africana |
| Depositing User: | Andriamparany Edilbert RANOARIVONY |
| Date Deposited: | 29 Nov 2018 10:47 |
| Last Modified: | 29 Nov 2018 10:47 |
| URI: | http://thesisbank.jhia.ac.ke/id/eprint/7972 |
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