Numerical Simulation of the Groundwater-Flow System in Tributary Subbasins and Vicinity, Lower Skagit River Basin, Skagit and Snohomish Counties, Washington

摘要

This report documents the development and calibration of a numerical model to simulate groundwater flow in tributary subbasins of the Skagit River and vicinity. The model described in this report can be used to assess the regional impacts of groundwater withdrawals on groundwater levels, and on groundwater discharge to streams. This report presents the information used to construct and calibrate the model, and provides assessments of model performance in simulating measured hydrologic conditions, and a discussion of model limitations. Information used to construct and calibrate the numerical model was based on the work of Fasser and Julich (2009) and Savoca and others (2009a).