Model Builder Analysis

This project centered on the analysis of the Stillaguamish watershed. The goal was to find the density of forest road and stream crossing density on both a sub-watershed and catchment level resolution. With this information, it will be easier to target the catchments and sub-watersheds that have the highest density in order to guide restoration efforts. This model shows the initial analysis process for both the Subwatershed level analysis.


Entire Watershed and Stream Network

This map shows the initial map and the resulting fields for the calculation of road density and crossing density within the watershed. Now that this data was available, it was possible to break down the watershed into sub-watershed and catchment level analysis.



In order to analyze the density of roads and stream crossings within catchments in the Stillaguamish watershed, it was first important to find the sub-watersheds within the watershed. This map displays the sub-watersheds and the density of stream crossings as well as the total distance of road and stream length in each sub-watershed.



Using the hydrology tool set within ArcGIS Pro, the catchments within the sub-watersheds in the Stillaguamish watershed were identified. The density of stream crossings within each catchment are displayed in a graduated color scale. Red catchments have the greatest density of stream crossings. This analysis can inform restoration work in order to limit runoff and sedimentation within streams in the watershed.