Summary
Creates a grid of slope-area values = (S^m)(A^n) based on slope and specific catchment area grid inputs, and parameters m and n. This tool is intended for use as part of the slope-area stream raster delineation method.
Usage
Command Prompt Syntax:
mpiexec -n <number of processes> SlopeArea
-slp <slpfile>
-sca <scafile>
-sa <safile>
[-par 2 1]
Parameters:
- slpfile: File name for slope grid (generally from DinfFlowDir) (input)
- scafile: File name for contributing area file (generally from AreaDinf) (input)
- safile: File name for output grid with S^m*A^n. Float. (output)
- par: Array of input parameters with p[0] being the slope exponent and p[1] being the area exponent
Note: The default parameter values of 2 and 1 are assumed unless -par is specified.
Syntax
SlopeAreaCombination (Input_Slope_Grid, Input_Area_Grid, Slope_Exponent__m, Area_Exponent__n, Input_Number_of_Processes, Output_Slope_Area_Grid)
| Parameter | Explanation | Data Type |
|---|---|---|
| Input_Slope_Grid |
Dialog Reference This input is a grid of slope values. This grid can be obtained from the "D-Infinity Flow Directions" tool. There is no python reference for this parameter. |
Raster Layer |
| Input_Area_Grid |
Dialog Reference A grid giving the specific catchment area for each cell taken as its own contribution (grid cell length or summation of weights) plus the proportional contribution from upslope neighbors that drain in to it. This grid is typically obtained from the "D-Infinity Contributing Area" tool. There is no python reference for this parameter. |
Raster Layer |
| Slope_Exponent__m |
Dialog Reference The slope exponent (m) parameter which will be used in the formula: (S^m)(A^n), that is used to create the slope-area grid. There is no python reference for this parameter. |
Double |
| Area_Exponent__n |
Dialog Reference The area exponent (n) parameter which will be used in the formula: (S^m)(A^n), that is used to create the slope-area grid. There is no python reference for this parameter. |
Double |
| Input_Number_of_Processes |
Dialog Reference The number of stripes that the domain will be divided into and the number of MPI parallel processes that will be spawned to evaluate each of the stripes. There is no python reference for this parameter. |
Long |
| Output_Slope_Area_Grid |
Dialog Reference A grid of slope-area values = (S^m)(A^n) calculated from the slope grid, specific catchment area grid, m slope exponent parameter, and n area exponent parameter. There is no python reference for this parameter. |
Raster Dataset |
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