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C Factor Tool

eRAMS C Factor Tool Summary This tool estimates C factor (runoff coefficient) based on NLCD (MRLC, 2016) landuse layer. C factor (runoff coefficient) is the essential parameter for calculating peak discharge from rainfall intensity and watershed area. Most C factor...

Overland Manning’s Roughness Coefficient

eRAMS Overland Manning’s Roughness Coefficient Tool   Summary This tool estimates Manning’s overland flow roughness coefficient (n) based on NLCD landuse layer. This tool was created in CSIP (David et al., 2015) environment. The look up table for NLCD...

Hydrologic Response Unit (HRU) delineation Tool

eRAMS Hydrologic Response Unit (HRU) Delineation Tool   Abstract eRAMS HRU delineation tool calculates HRUs as a vector format by intersecting several input layers. The essential layers are landuse, soil and slope layers. Also, user can add more input layers....

Geospatial Tools

The following geospatial tools are available within eRAMS: Intersection Union Clip Merge Spatial Interpolation As well as a number of others that still need additional...

Geospatial Merge

To perform a geospatial merge, perform the following steps: Open the Map Page Login to eRAMS.  Click on the “Projects” tab on the left-hand side of the page, then click on a project to open the “GIS/Analysis” page for the project. Open the...