HEC-HMS Tutorials and Guides GIS Tools and Terrain Data Current: GIS Tutorials and Guides PDF Download PDF Download page GIS Tutorials and Guides. Current page Include child pages All pages GIS Tutorials and Guides Geo-Referencing Existing Basin Model Elements using Shapefile Information Creating New Basin Model Elements by Importing GIS Features in Shapefiles Updating Subbasin and Reach Delineations using HEC-HMS GIS Tools Downloading Elevation and Watershed Boundary Data Preparing Terrain Data for HEC-HMS using ArcMap Preparing Terrain Data for HEC-HMS using QGIS Applying the Terrain Reconditioning Tools Using the Parameter Expression Calculator to Estimate Model Parameters Applying the Maricopa County Parameter Estimation Tools Creating a Curve Number Grid and Computing Subbasin Average Curve Number Values Importing Gridded SCS Curve Number in HEC-HMS Comparing GIS Processing Run Times with Different Size Terrain Models and Computers Reducing Your Project's Footprint Changing the Basin Model Discretization from File-Specified to Structured ×