I was wondering if there are good publicly available dataset for surface run-off (water)?
I have a rough idea that surface run-off should be some function of rain-fall and soil infiltration/absorption etc. My question is whether there is some reputable dataset for Africa or globally.
I did a preliminary search, but most datasets that say "rainfall/run-off" are actually rain-fall data. And I can't find a run-off dataset for download.
I have STRM DEM data, and have processed the terrain using ArcHydro. What I am really looking for is something that combines rainfall and soil absorption etc, to give runoff estimates.