The influence of snow storage and melting processes on the infiltration and recharge of aquifers has been little studied. In cooperation with some Spanish Confederaciones Hidrográficas, major governance organism within Spanish river basins, the UPM Department of Morphology and Terrain Engineering has designed a first experience on improving River Management related to recharge through melting processes. Results indicate that, under certain conditions, the formation of the snow mantle on high permeability lands and its subsequent liquefaction, increase the percentage of infiltrated water and the volume of water underground finally recharged. The peculiar hydrological characteristics of most of the Iberian Peninsule mean that the flow of low water at a certain point of the river network, is primarily due to the underground runoff from the depletion of the Masses of Groundwater (MASb) that drain upstream. These are sensitive to changes in the amount and distribution of snow in the headwaters of rivers. On this basis, the work proposes a methodological study of the influence of snow on the recharge within the ASTER model. At the same time, it carries out a study of the regional piezometric level of the Alto Tajo region and its relationship with the natural discharge of water bodies, which are largely natural, and the contribution to the Entrepeñas and Buendía reservoirs in the months of low water. The objective is twofold: 1)To be able to establish a quantification of the recharge caused by snow melting and 2) To relate the level of the piezometers with the dynamic reserves in the aquifer.
Thus, the work addresses a systematic collection and study of the readings of piezometers currently installed, the contributions to the aforementioned reservoirs and the calculation of the balances for different situations of snow and precipitation modeled with ASTER. From these data and relationships, interesting conclusions will be obtained for the exploitation of mentioned basin.