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Mediterranean catchments usually exhibit strong gradients of both weather variables at different time scales and soil uses, which add complexity to their hydrological modelling, especially in mountainous areas. WiMMed (Water integrated Management model for Mediterranean regions) model was designed to include such variability of scales in an operational suite capable of connecting GIS-based representations of the catchment (soil characteristics and uses, vegetation cover and snow dynamics) with advanced algorithms for simulating the energy and water balance on a physical basis. Widely used throughout the South of Spain, WiMMed efficiently represents the spatial patterns of precipitation, temperature, solar radiation, and evapotranspiration on an hourly basis, the daily evolution of the vegetation cover fraction, and the observed soil use changes over the study period, by means of specific interpolation algorithms and the inclusion of data derived from remote sensing. These high resolution data input to the physical equations of the energy and water balance performed on three series control volumes: canopy, snowpack, and soil, allow for the distributed characterization of water dynamics. Rainfall excess and infiltration and groundwater fluxes are routed towards selected control points along the fluvial network, where the corresponding baseflow, subsurface flow and direct runoff hydrographs that can be routed downstream by means of hydraulic or hydrological equations. WiMMed’s physical basis together with its high resolution multiscale scheme provides managers with an advanced support tool for flood/drought studies, natural regime restitution, short to long term water resource planning, evaluation of changes of soil use, etcetera. This work shows WiMMed capabilities from its use in selected watersheds throughout Andalusia (Spain) performed on the available free-distributed users’ interface designed for technicians and turnkey applications, some of which have been selected as examples.


Session R30, Hydrologic Modeling: Precipitation



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