Hydrological implications of land-cover and land-use change: a proposal for spatial analysis at a regional level in the closed Cuitzeo-lake basin, Michoacán

Abstract

This study was undertaken to understand the implications of regional land-cover and land-use change (LCLUC) in a spatially distributed water balance (SDWB) within a poorly gauged basin in 1975 and 2000. Results from this work were derived by integrating remote sensing and geographic information system tools with a water-balance model, along with the application of a transitional matrix analysis. The analysis of changes in water-balance components, based on landforms and transitional matrices, indicated a small tendency towards improvement in the basin's hydrological conditions at a regional level. However, as a consequence of the increase in urban land-use, the basin's plains piedmonts showed a rice in runoff. In addition, the basins' lower areas exhibited a high demand for water resources due to an increased urban land-use in both years, along with the Cuitzeo lake degradation, particularly in terms of pollution and reduction of surface water inflow. The integrated approach used herein constitutes a viable alternative for understanding changes in the amount and spatial distribution of water available in poorly gauged water basins as a consequence of LCLUC.

Keywords

• Sistemas de información geográfica
• percepción remota
• matrices de transición
• análisis regional
• cambio de cobertura vegetal y del suelo
• balance hídrico
• cuencas poco aforadas