Nigeria: Soil and Water Resources Survey of the Sokoto Valley, final report. Vol 4, climate and hydrology. Part 2, figures

air air temperature aire bassin versant cartografia cartographie cartography classification classification des sols climatologia climatologie climatology drainage systems eau de ruissellement energia solar flooding flow rate forecasting gasto groundwater hidrologia humedad relativa hydrologie hydrology inondation institution de recherche measurement mesure meteorologia meteorologie meteorology permeabilidad permeability precipitation red de drenaje relative humidity research institutions runoff water soil soil classification sol solar energy suelo temperatura del aire vegetation vent viento water holding capacity water levels watersheds winds