An efficient variable storage coefficient (VSC) approach for 3-Dgroundwater modelling of wetlands

摘要

Modelling the actual soil water storage capacity of wetlands by using the proposed VSC(Variable Storage Coefficient) module simulation results can be significantly improved in situations offluctuating groundwater tables. It is shown that VSC-based groundwater table solutions agree very wellwith full Richards equation solutions resulting from a rigorous unsaturated flow simulation in 3-D. Usingthe much simpler VSC approach provides the advantage that no parameterisation for unsaturated flow isneeded. Furthermore, the required water retention relationships do not have to be adjusted to a parametricfunction and can be directly used in the form of discrete tabular values.