Groundwater/Surface Water Temperature Variations and Hydrogeological Implications in Doñana National Park

A recent study on Doñana National Park reveals significant groundwater and surface water temperature shifts during a dry-warm period (2020–2023), marked by reduced precipitation and rising air temperatures. While shallow piezometers (~15 m depth) showed increased annual mean water temperatures, deep piezometers recorded a decrease in water temperature and reduced variability. A phase shift between groundwater temperature extremes and air temperature variations was also observed, with its magnitude depending on sensor depth. These findings highlight the sensitivity of Doñana's wetlands to global environmental changes and provide insights into aquifer recharge and discharge dynamics at local and regional scales. The research analyzed eight hydrometeorological years (2016–2024) using temperature data from sand-dune ponds and piezometers, offering a comprehensive assessment of flow variability under extreme climatic conditions.

Yanes, J. L., Jiménez-Bonilla, A., Martínez-Caro, M., Fernández-Ayuso, A., & Rodríguez-Rodríguez, M. (2025). Groundwater/Surface Water Temperature Variations and Hydrogeological Implications in Doñana National Park. Environments, 12(3), 83. https://doi.org/10.3390/environments12030083