SEWAB – a parameterization of the Surface Energy and Water Balance for atmospheric and hydrologic models

摘要: Abstract A soil-vegetation-atmosphere-transfer scheme, which solves the coupled system of Surface Energy and Water Balance (SEWAB) equations considering partly vegetated surfaces, is presented. In terms complexity, SEWAB similar to many other land–surface schemes with respect calculation turbulent fluxes sensible latent heat latter being based on one-layer concept for vegetation. Emphasis put description soil processes as link between atmospheric hydrologic system. The diffusion moisture are solved semi-implicitly a multi-layer grid. runoff baseflow may be calculated saturation excess usually done in models. addition this, variable infiltration capacity (VIC) approach included alternatively takes into account influence topographic heterogeneities inside grid cell surface prediction. Subsurface also described by ARNO conceptualization allowing gradual increase content. hydraulic conductivity function depth. has been validated field data from FIFE experiment participated PILPS project intercomparison parameterization schemes. partitions reasonably well incoming solar radiation precipitation storage. inclusion slightly improves estimation timing total runoff. Changes subsurface production drainage show only minor effects.