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Impact of Climate Change on Land Suitability for the Optimization of the Irrigation System in the Anger River Basin, Ethiopia

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Department of Civil Engineering Sciences, Faculty of Engineering and the Built Environment, University of Johannesburg APK Campus, Auckland Park 2006, Johannesburg P.O. Box 524, South Africa
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School of Water Resource & Environmental Engineering, Haramaya Institute of Technology, Haramaya University, Dire Dawa P.O. Box 138, Ethiopia
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Bureau of Watershed Management and Modeling, St. Johns River Water Management District, 4049 Reid St, Palatka, FL 32177, USA
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School of Civil and Environmental Engineering, Addis Ababa institute of Technology (AAiT), Addis Ababa University, Addis Ababa P.O. Box 385, Ethiopia
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Author to whom correspondence should be addressed.
Climate 2020, 8(9), 97; https://doi.org/10.3390/cli8090097
Received: 9 June 2020 / Revised: 11 August 2020 / Accepted: 18 August 2020 / Published: 21 August 2020
Evaluating climate change impacts and the suitability of potential land resources is crucial for sustainable irrigated agricultural systems. This study applied a multi-criteria analysis supported by the Geographic Information System (GIS) application to produce irrigation suitability maps for the Anger River basin’s (Ethiopia) irrigation command area to optimize its irrigation system. Six irrigation suitability factors, such as distance to water sources (rivers), slope, land use/land cover, soil texture, drainage, and depth, including climate change impacts, were used. These factors were spatially analyzed using a comparison matrix and overlying the factors with 30 m resolutions to estimate the potential irrigable area. About 40% of the study area was classified as moderately to highly suitable for surface water irrigation systems. Moreover, we found that a large proportion of the study area is suitable for surface irrigation system, suggesting the relevance of implementing an enhanced irrigation system for improving the surface irrigation water productivity of the basin. However, future climate change is predicted to negatively affect the irrigation suitable area due to water scarcity. Therefore, this study provides useful information on the irrigation suitability and potential of the study area that could be used to facilitate the water resource development and food security plans. View Full-Text
Keywords: Anger River basin; climate change; Ethiopia; land suitability; multi-criteria; GIS Anger River basin; climate change; Ethiopia; land suitability; multi-criteria; GIS
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Dawit, M.; Dinka, M.O.; Leta, O.T.; Muluneh, F.B. Impact of Climate Change on Land Suitability for the Optimization of the Irrigation System in the Anger River Basin, Ethiopia. Climate 2020, 8, 97.

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