SAGA-GIS Module Library Documentation (v2.2.1)

Module Upslope Area (interactive)

This module allows you to specify target cells, for which the upslope contributing area shall be identified. The result will give for each cell the percentage of its flow that reaches the target cell(s).

References:

Deterministic 8
- O'Callaghan, J.F. / Mark, D.M. (1984):
'The extraction of drainage networks from digital elevation data',
Computer Vision, Graphics and Image Processing, 28:323-344

Deterministic Infinity:
- Tarboton, D.G. (1997):
'A new method for the determination of flow directions and upslope areas in grid digital elevation models',
Water Resources Research, Vol.33, No.2, p.309-319

Multiple Flow Direction:
- Freeman, G.T. (1991):
'Calculating catchment area with divergent flow based on a regular grid',
Computers and Geosciences, 17:413-22

- Quinn, P.F. / Beven, K.J. / Chevallier, P. / Planchon, O. (1991):
'The prediction of hillslope flow paths for distributed hydrological modelling using digital terrain models',
Hydrological Processes, 5:59-79

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Interactive version (left mouse clicks will trigger the calculation for the selected cell).

Parameters

 NameTypeIdentifierDescriptionConstraints
InputElevationGrid (input)ELEVATION--
Sink Routes (*)Grid (optional input)SINKROUTE--
OutputUpslope AreaGrid (output)AREA--
OptionsMethodChoiceMETHOD-Available Choices:
[0] Deterministic 8
[1] Deterministic Infinity
[2] Multiple Flow Direction
Default: 2
ConvergenceFloating pointCONVERGEConvergence factor for Multiple Flow Direction algorithmMinimum: 0.001000
Default: 1.100000
(*) optional

Command-line

this interactive module can not be executed.