Groundwater dataset (water table level), over the Donga watershed (600 km2), Benin

Documentation of the processes of groundwater recharge-discharge. Documentation of the groundwater-river connections. Contribution to the water budget at the hillslope scale in relation with soil water, runoff measurements. The identified processes will be used to improve hydrological modelling at the super-site scale (Donga). This dataset is part of the AMMA-CATCH eco-hydrological observatory over West Africa Measurements of water level, electrical conductivity and water temperature are made by multi-level piezometers (<1m, 2m, 10m 20m depth) installed on each drilling site along specific vegetation catena (fallow, forest, bush savannah). Automatic measurements for the most superficial piezometers and manual measurements every two days for the others. The water table level values are expressed from the soil surface. A value = 9999 stands for a dry borehole. Hector, B., Séguis, L., Hinderer, J., Cohard, J.-M., Wubda, M., Descloitres, M., Benarrosh, N., and Boy, J.-P., 2015. Water storage changes as a marker for base flow generation processes in a tropical humid basement catchment (Benin): Insights from hybrid gravimetry. Water Resour. Res., 51, 8331-8361, doi:10.1002/2014WR015773. Herzog, A., Hector, B., Cohard, J.-M., Vouillamoz, J.-M., Lawson, F.M.A., Peugeot, C., de Graaf, I, 2021. A parametric sensitivity analysis for prioritizing regolith knowledge needs for modeling water transfers in the West African critical zone. Vadose Zone J., 20: e20163, doi:10.1002/vzj2.20163