Hydrodynamic Characterization of the Water Table of the Upper Dallol Maouri Basin (Niger)

The Dallol Maouri is a valley of an ancient tributary the Niger River. groundwater in this area upper little known because weakness data. purpose study to make hydrodynamic characterization water table dallol by piezometric approach. A monitoring network made up 65 points (54 wells and 11 piezometers) was set up. Six (6) measurement campaigns were carried out from June 2018 2021. survey once every six months: January corresponding respectively high low period. results show that multi-layered places with combination alluvial Continental Terminal 3 (CT3) aquifers, or perched aquifers inferoflux around permanent ponds. flow direction aquifer mainly North-East/South-West. levels are 219 m (in South-West part) 281 North-East part). hydraulic gradient varies 0.018‰ 1.83‰. recharge zones located outcrop zone valleys. lack observed on plateaus despite presence numerous coefficient 2020 estimated at 25% total rainfall recorded.