Quantifying Focused Groundwater Recharge Induced by Irrigation Surface Water Reservoirs in Crystalline Basement Areas for Complementary Irrigation

摘要: Through the practice of irrigation, surface water reservoirs (SWRs) contribute to socio-economic development and food production activities populations in Sub-Saharan Africa (SSA). However, they tend dry up prematurely. One solution circumvent these irrigation shortages is ensure their conjunctive use with groundwater. The objective this study better understand contribution SWRs groundwater recharge determine if may be considered as a complementary local resource for irrigation. was carried out on two watersheds Burkina Faso, Kierma Mogtedo. spatiotemporal analysis piezometric level records coupled physico-chemical analyses used characterize exchanges between regional at scale assessed. At scale, balance methodology developed estimate focused recharge. results show that interact almost continuously magnitude function geological context sediment texture SWRs. It estimated 5 mm/day 4 These values are higher than natural 0.2 0.1 Additionally, hydraulic conductivity 0.01 2 m/day 1 × 10−4 conductivities could allow pumping large-diameter hand-dug wells significant yield 0.5 120 m3/day 0 10 Mogtedo palliate early drying