Assessing the Effect of Land/Use Land Cover and Climate Change on Water Yield and Groundwater Recharge in East African Rift Valley using Integrated Model

• DOI: 10.1016/j.ejrh.2021.100926
• Publication Date: 2021-09-21T02:43:01Z
• Authors: Bisrat Ayalew Yifru; Il-Moon Chung; Min-Gyu Kim; Sun Woo Chang
• Keywords: Land Cover; MODFLOW; Rift valley; SWAT model

East African Rift Valley basin. Water availability in the rift valley relies heavily on discharge from highlands to rivers that run floor. This research explores effect of Land use/Land cover (LULC) and climate change water yield groundwater recharge (WYGR) using coupled SWAT-MODFLOW, which integrates Soil Assessment Tool (SWAT) Newton Modular Finite Difference Groundwater Flow (MODFLOW-NWT). The LULC was analyzed artificial neural network-based cellular automata. dominant is cultivated land expanded by 5% forest grassland areas. average temperature precipitation are expected rise 8–11% 3–6%, respectively. Climate affects spatiotemporal distribution WYGR significantly, while has a trivial effect. Under baseline scenario, 10% annual precipitation, but projected reduce it 47–53%. reduction up 48% perennial intermittent coming decades. region will experience scarcity, emerging mainly change.