Recarga potencial del acuífero de la sub-cuenca del río Chambo bajo una perspectiva de la hidrología física

Abstract

Groundwater resources are very important for many regions around the world. The aim of this research is to identify possible regions of groundwater recharge in a study area that sorrunds the Chambo River basin. The selected study area covers approximately 12 550 km2. In order to characterize groundwater

recharge, three methods were applied a) surface water balance in this study area, b) recharge analysis using base flow separation methods and c) the implementation of the GR2M model. These methodologies were applied in six sub-basins, they were divided in two groups that are located in the western and eastern of the Chambo river. For the east sub-basins, the recharge value is between 452.9 and 806.8mm/year (method a) and 187.3 and 553.5mm/year (method b). For the west sub-basins, the recharge is between 95.9 and 234.1mm/year (method a) and between 58.4 and 127.7mm/year (method b). For the c) methodology, the adjustment of model result only for a sub-basin, Nash value is 49.1% that is satisfactory. While for the others sub-basins there isn’t evidence of an adjustment. Therefore, it isn’t possible to define a contribution of water to the others sub-basins.