Understanding the impact of land use/land cover (LULC) and climate patterns on basin runoff is necessary in assessing basin water stress. This assessment requires long-term observed rainfall time series and LULC spatial data. In order to assess the potential water stress, the study used long-term (1981–2007) rainfall data to drive the Pitman monthly rainfall–runoff model to assess changes in runoff for three selected basins: Asa, Ogun and Owena. In spite of the limitations in the availability of spatio-temporal hydro-meteorological data, the model results revealed commensurate increase in the runoff coefficient with decreases in forest cover between 1981 and 2000. Low runoff coefficients of 5.3%, 12.0% and 6.4% were recorded for Asa, Ogun and Owena basins based on C-CAM projection of low rainfall for 2010–2050. These indicated that in the future, water stress in Asa and Owena basins would be much higher, when compared with Ogun basin
A. Amidu, Evison, K., Alabi, S., Sajith Vezhapparambu, and Jimmy, A., “Assessing the Impact of Land Use/land Cover and Climate Changes on Water Stress in the Derived Savanna”, Proceedings of H01, IAHS-IAPSO-IASPEI Assembly, 2013.