Documentation of a Computer Program (STREAMLINK) to Represent Direct-FlowConnections in a Coupled Ground-Water and Surface-Water Model

摘要

The MODFLOW finite-difference ground-water flow model has been coupled with threesurface-water packages--the River, Stream, and MODBRANCH packages--to simulate surface flows and its interaction with ground water. To facilitate wider and more flexible uses of the packages, a computer program (Streamlink) was developed and added to MODFLOW, allowing direct flows to occur between any of the packages and MODFLOW. These flows can be calculated on the basis of water levels, by a transfer of boundary discharge, or by simply equating water levels at the interface depending on the individual configuration of each package. Streamlink is especially beneficial when simultaneously using the River, Stream, or MODBRANCH packages or when modeling a river flowing directly into or out of a wetlands in direct connection with the aquifer.