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Impacts of groundwater abstraction on temporary ponds in Doñana

Water level changes have been monitored over 25 years in several temporary ponds located at different distances to a pumping area of a tourist resort fringing the Donana National Park (SW Spain). The numerical model MIKE SHE was set up to simulate pond water levels and hydroperiod fluctuations. It was calibrated for nine hydrological years and validated for two periods of eight hydrological years each to assess whether the duration of the pond wet phase (hydroperiod) significantly deviated from an expected pattern driven by rainfall and evapotranspiration. The model output indicated a satisfactory performance for all simulations. This approach provided two main conclusions: a) a long-term increasing trend in water losses on the pond water balance which has not been followed by a corresponding decreasing trend in rainfall, and b) these water losses were highest in the pond located at < 1 km to the pumping area and lowest in the pond located at a further distance (5.6 km) and at a lower altitude. These results suggest that, in the long run, a small groundwater abstraction rate has exerted a high hydrological pressure on the closest pond to the pumping area. informacion[at] Dimitriou et al (2017) Hydrodynamic numerical modelling of the water level decline in four temporary ponds of the Doñana National Park (SW Spain). J Arid Environ
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Impactos de la extracción de agua subterránea en lagunas temporales de Doñana

Se han monitoreado los cambios en el nivel del agua durante 25 años en varias lagunas temporales ubicadas a diferentes distancias de un área de bombeo en una zona turística limítrofe al Parque...