SAGA-GIS Tool Library Documentation (v9.1.2)

Tool Downslope Area (interactive)

This interactive tool allows you to specify source cells (with a left mouse click), for which the downslope area shall be identified. For the 'Deterministic Infinity' and 'Multiple Flow Direction' algorithms, which are able to simulate flow divergence, the result will give the percentage of the source cell's flow that drains through each cell.


References


Parameters

 NameTypeIdentifierDescriptionConstraints
InputElevationGrid, inputELEVATION--
Sink Routes (*)Grid, input, optionalSINKROUTE--
OutputDownslope AreaGrid, outputAREA--
OptionsGrid SystemGrid systemPARAMETERS_GRID_SYSTEM--
MethodChoiceMETHOD-Available Choices:
[0] Deterministic 8
[1] Rho 8
[2] Braunschweiger Reliefmodell
[3] Deterministic Infinity
[4] Multiple Flow Direction
[5] Multiple Triangular Flow Directon
[6] Multiple Maximum Downslope Gradient Based Flow Directon
[7] Kinematic Routing Algorithm
[8] DEMON
Default: 4
ConvergenceFloating pointCONVERGENCEConvergence factor for Multiple Flow Direction Algorithm (Freeman 1991). Applies also to the Multiple Triangular Flow Directon Algorithm.Minimum: 0.001000
Default: 1.100000
Contour LengthBooleanMFD_CONTOURInclude (pseudo) contour length as additional weighting factor in multiple flow direction routing, reduces flow to diagonal neighbour cells by a factor of 0.71 (s. Quinn et al. 1991 for details).Default: 0
(*) optional

Command-line

this interactive tool can not be executed.