Estimating climate-change effects on a Mediterranean catchment under various irrigation conditions
作者： D. von Gunten , T. Wöhling , C.P. Haslauer , D. Merchán , J. Causapé
DOI: 10.1016/J.EJRH.2015.08.001
关键词:
摘要: Abstract Study region The Lerma catchment, a small (7.3 km 2 ) sub-catchment of the Ebro Basin in northern Spain. focus catchment underwent monitored transition to irrigated agriculture, using water from outside between 2006 and 2008. This has successfully been simulated partial-differential-equation-based model HydroGeoSphere, simulating coupled evapotranspiration, surface water, groundwater flow catchment. We use calibrated study how irrigation practices influence response climate change projected for consider four different scenarios: no irrigation, present climate-adapted with current crops, adapted crops requiring less water. scenarios are based on regional models two downscaling methods. New hydrological insight responses show clear differences scenarios. In future climate, levels base flows decrease more when is than without because already at low irrigation. contrast, annual peak discharges increase non-irrigated cases cases. Irrigation increases availability an associated rise potential evapotranspiration results higher actual during summer. scenarios, by summer controlled precipitation thus decreases climate.
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