This paper aims to determine how both climate and local drivers, such as groundwater withdrawals influence surface water - groundwater interactions in Groundwater Dependent Ecosystems (GDEs). We studied the hydroperiod in eight of the most representative ponds of Doñana National Park (southern Spain) during a 21-year period. We analyzed the average flooded phase of each pond as well as the average depth of the piezometric level in nearby piezometers. In addition, we used the average precipitation as a proxy of the water inputs onto the ponds. The average flooded surface was taken by a previous analysis of satellite images and the depth to the piezometric level was field measured at a monthly time step. We found out that the average precipitation was slightly lower during the second decade (675 mm/y vs. 552 mm/y). Nonetheless, 5/8 of the ponds showed a much higher shrinking of the flooded surface that could not be explained only by a reduction in the precipitation events. Local drivers were found to be decisive in the degradation of 3/8 of the ponds: those closer to a pumping facility and located at a higher altitude.

本文旨在确定气候和当地驱动因素（例如地下水的抽取）如何影响地下水依赖性生态系统（GDE）中的地表水-地下水相互作用。在21年的时间里，我们研究了Doñana国家公园（西班牙南部）中八个最具代表性的池塘的水文期。我们分析了每个池塘的平均淹水阶段以及附近测压计中测压水位的平均深度。此外，我们使用平均降水量作为池塘水输入的替代指标。通过之前对卫星图像的分析来获取平均水淹表面，并在每月的时间步长上实测测压深度的深度。我们发现，第二个十年的平均降水量略低（675毫米/年对552毫米/年）。尽管如此，5/8的池塘显示出淹没面的收缩要高得多，这只能通过减少降水事件来解释。人们发现，当地驱动因素对3/8池塘的退化起着决定性作用：靠近抽水设施且海拔较高的池塘。