Development of WEP model and its application to an urban watershed

摘要: A distributed hydrological model, water and energy transfer processes (WEP) is developed to simulate spatially variable in watersheds with complex land covers. In the state variables include depression storage on surfaces canopies, soil moisture content, surface temperature, groundwater tables stages rivers, etc. The subgrid heterogeneity of use also taken into consideration by using mosaic method. For processes, evapotranspiration computed Penman–Monteith equation, infiltration excess during heavy rains simulated a generalized Green–Ampt whereas saturation remaining periods obtained doing balance analysis unsaturated layers. two-dimensional simulation multilayered aquifers performed for flow. Flow routing conducted kinematic wave method one-dimensional scheme. short-wave radiation based observation or deduced from sunshine duration, long-wave calculated according temperatures, latent sensible fluxes are aerodynamic temperature solved force–restore addition, anthropogenic components, e.g. supply, lift, sewerage drainage consumption, account. model applied Ebi River watershed (27 km2) grid size 50 m time step 1 h. verified through comparisons river discharges, levels temperatures observed values. comparison between at present (1993) that future (2035) conducted. It found cycle can be improved implementation trenches storm urban canopies. Copyright © 2001 John Wiley & Sons, Ltd.