Hillslope Roughness

Description

The kinematic roughness equations require a roughness parameter alpha, given by alpha = SQRT(S)/n, where S is slope [L/L] and n is Manning's roughness coefficient. This step computes the mean hillslope slope S, the area-weighted Manning's roughness coefficient n, and uses these to compute alpha. For additional information on these parameters, refer to the Toolbox documentation.

Usage

This step computes the mean hillslope slope S, the area-weighted Manning's roughness coefficient n, and uses these to compute alpha. For additional information on these parameters, refer to the Toolbox documentation.

Parameters

Parameter Name	Type	Direction	Data Type	Dialog Reference
Input Width Function Hillslopes	Required	Input	Feature Layer	Partitioned hillslopes with hillslope width function attributes calculated using the Hillslope Width Function tool (Terrain Preprocessing).
Input Landcover Raster	Required	Input	Raster Layer	Input NLCD landcover raster. See https://www.mrlc.gov/.
Input Hydro DEM	Required	Input	Raster Layer	Input filled DEM (use "Fill DEM" in Terrain Preprocessing).
Output Hillslopes Roughness	Required	Output	Feature Layer	Output hillslopes with alpha calculated.