Validation of a Numerical Modeling Method for Simulating Rainfall-RunoffRelations for Headwater Basins in Western King and Snohomish Counties, Washington

摘要

The validity of a method to simulate pre- and post-urbanization rainfall-runoffrelations for headwater basins in western King and Snohomish Counties was assessed. It was intended that additional numerical models constructed with this method, along with existing physiographic, land-use, and climate data, could help mitigate urbanization effects in drainage basins throughout the region. This report documents an assessment of the validity of four primary components of the numerical modeling method: the conceptual model, the Hydrologic Simulation Program-FORTRAN (HSPF) program, the approach used to construct numerical models, and the 12 sets of precalibrated, or generalized, HSPF parameter values determined in a previous investigation.