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UNESCO-IHE Institute for Water Education, Delft (2020)

Estimating water consumption through hydrological modelling in Mara River Basin

Ashiono, Eunice Shisiali

Titre : Estimating water consumption through hydrological modelling in Mara River Basin

Auteur : Ashiono, Eunice Shisiali

Université de soutenance : UNESCO-IHE Institute for Water Education, Delft

Grade : Master of Science (MS) 2020

Résumé
The Mara River Basin (MRB), is transboundary shared between Kenya and Tanzania. The basin covers a total area of 13,834km2, with the larger upper part of the basin (65%) in Kenya while 35% of the basin lies in Tanzania. The Upper Mara Basin in this study refers to the Amala, the Nyangores and some part of the Emarti sub-catchments in the MRB, on the Kenyan side. It covers an area of 3400km2, which is approximately 26% of the total area of the MRB. The natural habitat of the Mara-Serengeti ecosystem depends heavily on the Mara River. The MRB has attracted many researchers because of its ecological and biodiversity importance. However, many studies show that there are significant environmental challenges due to land-use changes in the basin. Irrigation agriculture is expanding in the MRB to increase food productivity. As a result, the river flows, especially during low flows and the ecosystem at large in the entire basin, have been affected. In the long run, there might exist a conflict between the livelihood and the ecosystem due to limited water resources. This research, therefore, aimed at using the modified Spatial Tool for River basin Environmental Analysis and Management (STREAM) model to quantify irrigation water abstraction in the Upper MRB for planning resource development and management in the context of multiple users for sustainability purposes. In addition to this, ETblue, which refers to the portion of evapotranspiration not from direct precipitation in the soil zone, contribution to total evapotranspiration was analysed for different land cover existing in the basin.

Sujets  : hydrological modelling Mara River Basin water use irrigation water resources

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Page publiée le 21 avril 2021