Tool NameWind Exposition Index
Tool ID27
Library IDta_morphometry
Version1.0
Author(s)J.Böhner, O.Conrad (c) 2015

Please cite SAGA whenever you use it for your publications:

doi:10.5194/gmd-8-1991-2015

Description

This tool calculates the average 'Wind Effect Index' for all directions using an angular step. Like the 'Wind Effect Index' it is a dimensionless index. Values below 1 indicate wind shadowed areas whereas values above 1 indicate areas exposed to wind.

Parameters

NameTypeIdentifierDescriptionConstraints
Input
Elevationgrid, inputDEM
Output
Wind Expositiongrid, outputEXPOSITION
Options
Search Distance [km]floating point numberMAXDISTMinimum: 0.000000
Default: 300
Angular Step Size (Degree)floating point numberSTEPMinimum: 1.000000
Maximum: 45.000000
Default: 15
Old VersionbooleanOLDVERuse old version for constant wind direction (no acceleration and averaging option)Default: 0
Accelerationfloating point numberACCELMinimum: 1.000000
Default: 1.5
Elevation AveragingbooleanPYRAMIDSuse more averaged elevations when looking at increasing distancesDefault: 0