A numerical model based on coupled one-dimensional Richards and Boussinesq equations

摘要: An approximate numerical method to solve transient two-dimensional unsaturated-saturated subsurface flow problems is presented. Several one-dimensional vertical unsaturated column models are linked a saturated model. The Dupuit-Forchheimer assumptions used for the flow, and assumed be strictly vertical. systems because solutions of equation governing determine recharge storage information flow. In addition, position water table locates lower boundaries models. solution test problem using model compared with results from rigorous comparison good at early times when small but poor later increases. Applications then made field-size problems. Results compare closely an actual groundwater hydrograph. show that in specific humid climate watershed type vegetation does not significantly affect regimen, whereas given arid would whether occurred. For where movement relatively small, valid, lateral important, offers efficient way