An Evaluation of the Effectiveness of Combining Economic and Physical Ground-Water Models

摘要

Techniques for combining or coupling regional groundwater flow models with economic models are evaluated. The two principal techniques described are linking and embedding. In the use of linking, the economic model and the hydrologic model are run at different stages: the economic model is run with known hydrologic factors (e.g., drawdown); the hydrologic model is then run with the output of the economic model as demands and the cycle are repeated. In the case of bedding, two approaches are used: difference equations and response functions. Using difference equations, the groundwater hydrogeology is molded by a set of linear equations derived from the partial differential equations of flow through porous media, and this set of equations is embedded directly into the economic model as a constraint set. Using response functions, a linear relationship between drawdown and stress can be determined.