Cuantificación de los aportes hídricos subterráneos a la laguna de Santa Olalla a partir de balances hídricos diarios (Parque Nacional de Doñana, Huelva)

Resum

In this project, a daily water balance in Santa Olalla interdunal pond, one of the few ones with permanent hydroperiod in Doñana National Park, has been made. The balance was made by determining the water inputs and outputs, using meteorological data from nearby stations as well as three-hours interval data of the water level in the pond. The results indicate a groundwater input of 0.39 hm3 to the pond from January 2015 to March 2016, compared to 0.11 hm3 by direct precipitation. The groundwater level in nearby piezome ters located on the dunal aquifer remained above the water level of the pond during the study period. Maintaining the water table levels in the unconfined aquifer is of vital importance to assure the groundwater input to the pond in the future. For this reason, groundwater withdrawals in this unique ecosystem must be monitored and appropriately managed.