Browsing by Author "Kitessa, Gidisa"

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    Surface irrigation Potential Mapping using GIS and Remote Sensing based Multi criteria Analysis in Abbay Basin, Upper Blue Nile, Ethiopia
    (Addis Ababa University, 2020-09) Kitessa, Gidisa; Ermias, Teferi (PhD)
    Multi-criteria irrigation land suitability analysis and mapping can play an important role not only in sustainable use of scarce resource, but also in overcoming the global problem of water scarcity and crop production caused due to high degree of rainfall variability and unreliability. The General objective of this work was to Map suitable land for Surface irrigation potential using GIS and remote sensing based multi criteria analysis in the abbay basin, upper Blue Nile, Ethiopia. The study employed Geographical information Systembased multi criteria land suitability analysis method considering eight factors, namely, soil pH, soil drainage, soil depth, Cation Exchange capacity of the soil, texture classes, Runoff, slope, and distance from the main river to find suitable land for surface irrigation. Using the Weighted Overlay tool, the values of each dataset were weighted and combined to find the most suitable location for irrigation using the ArcGIS environment. The results of the study revealed that about 5741870.55 ha (29.26 % of the watershed area) highly suitable, 7013480.98 ha (35.74 % of the watershed area) moderately suitable, 5013834.33 ha (25.55 % of the watershed area) marginally suitable, 1854431.87 ha (9.45 % of the watershed area) not suitable. The findings drawn from this study can play an indispensable role in boosting irrigable land in the study area by considering suitable irrigable lands in terms of the eight factors described. About 38892.70ha of land can be irrigated at the gauge location of the rivers in South Gojam watersheds without further development on the downstream.