Vertical average for modeling seawater intrusion

摘要: [1] Seawater intrusion in coastal aquifers is a 3-D phenomenon. However, regional aquifer models are often limited by insufficient geological and hydrological data, the large horizontal to vertical scales ratio, numerical constraints. We present an effective formulation for modeling seawater that relies on dimensional reduction of original density-dependent flow transport problem. carry out integration problem arrive at coupled set 2-D equations mean flux salt concentration, which essentially identical those groundwater flow. two new terms emerge from integration: (1) Darcy's law needs not only buoyancy term reflecting bottom slope, but also another one variability thickness; (2) requires variations flux, essential we approximate means Fickian dispersion term. The proposed verified direct steady state simulations confined aquifers. results show correctly reflects dynamics system.