An evapotranspiration model driven by remote sensing data for assessing groundwater resource in karst watershed

摘要: Abstract Aquifer recharge may depend mainly on the difference between precipitation and evapotranspiration. Hydrological models used to estimate groundwater reserves use evapotranspiration that are determined by climate demand. In particular, mechanisms of plant transpiration neglected, although constitutes 70% This is problematic when considering karst watershed, which poorly documented at interface soil atmosphere where vegetation properties control water flows. To fill this gap, we propose an model integrates processes evaporation. The dynamics evaluated using Enhanced Vegetation Indexes from Terra Aqua Moderate Resolution Imaging Spectroradiometers. evaporation calculation account for impact coarse elements surface. “Simple Crop coefficient Evapotranspiration” (SimpKcET) tested flux tower sites over forest Font-Blanche, Puechabon agricultural area Avignon. simulated daily evapotranspirations very close observations (RMSE ~0.5 mm.d-1), while simple compared other proposed in literature. SimpKcET implemented a hydrological evaluate estimation aquifer flow rate simulation. approach applied vast watershed Fontaine de Vaucluse. comparison bucket frequently models, provide ET simulations more line with processes. A cross wavelet analysis highlighted improvement observed relationship brought consideration remote sensing data related activity makes it possible parsimonious can be all types (agricultural, natural, mixed forest) transferred models.