Abstract
As a scheme to improve the river environment in an urbanized basin, it is important to restore the hydrologic relationships between stream and aquifer. In this research, based on the hydraulic models of the stream-unconfined aquifer system, the dynamic interaction between them is analyzed to evaluate the bank storage effect of aquifer. Especially for the simple linear system, closed forms are formulated and numerical solutions are computed for the more universal nonlinear system. Through the paper, it is pointed out that the bank storage of aquifer functions to keep the stability of flow condition in the stream channel.
