Description: Analysis units (AU) are aggregated from the SSHIAP catchments derived from geomorphic stream segments stored originally in HydroEdge. For a complete description of the overall water flow model and each attribute, see the Department of Ecology publication # 11-06-016, Puget Sound Watershed Characterization, Volume 1: the Water Resource Assessments (Water Flow and Water Quality).The water flow assessment is the result of a modeling approach to assess the areas of relative importance (Model 1) to the water flow process and the relative degradation (Model 2) to the process from human activity among analysis units across a watershed (WRIA). It is a broad scale analysis to identify areas on the landscape that are most important for maintaining the water flow process, and to characterize the degree of degradation to the process from human activity. The results can help to identify areas that are : 1) more important to protect, 2) a higher priority to restore, and 3) more appropriate for development. It is best suited to analysis at the watershed or sub-watershed scale, or tens to hundreds of square miles, with individual analysis units being in the range of approximately one to fifteen square miles. It is not intended for use at the site scale.