Land Systems response to Water Footprint in the Wooded Savannah of Nigeria
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Obafemi Awolowo University Press
Erratic space and time distribution of rainfall coupled with increase in temperature means less water. The water footprint, therefore, will be critical for future development in dry and semi-dry areas where survival for large population depends on rainfed agriculture and the natural resource stock. This study investigates the linkage between water footprint and land system changes. Present and projected future rainfall and temperature data were integrated with local eco-geographical factors and subjected to principal component analysis (PCA) to decipher the present and future pattern of water footprint. These integrated dataset was also analyzed to build change drivers which were applied to satellite image derived land-cover maps to project future land-cover pattern under both present and future climate scenario using Idrisi’s dynamic CA_Markov land change model. The results suggest the emerging and future spatial pattern of ecosystems, agricultural land-use and agrarian settlements will largely follow the water footprint. Under future climate scenario (2046-2065) galleria forest - a signature of the drier savannah - is projected to dominate much of the presently forested landscapes and this will correspondingly shift the water footprint and thus alter the spatial and temporal pattern of agricultural land-use and settlement locations.
Fasona, M, Tadross, M, Abiodun, B, & Omojola, A (2011): Land Systems response to Water Footprint in the Wooded Savannah of Nigeria, p499-523. In Salami, A.T & Orimoogunje, O.I (eds): Environmental Research and Challenges of Sustainable Development in Nigeria. Ile Ife: Obafemi Awolowo University Press, NIGERIA