Can someone direct me to a portal where I can get the following 2D gridded Hydrological data over the Black Volta Basin in West Africa?

I need: 1) Hydraulic conductivity, 2) Soil porosity, 3) Soil compressibility, 4) Aquifer thickness, 5) Depth of river channel, and 6) Elevation of water surface

06 June 2013 856 2 View