QGIS algorithm - Flow accumulation (one step)

Source: R/sagang_flowaccumulationonestep.R

QGIS Algorithm provided by SAGA Next Gen Flow accumulation (one step) (sagang:flowaccumulationonestep). —————- Arguments —————- DEM: Elevation Argument type: raster Acceptable values: - Path to a raster layer TCA: Flow Accumulation Argument type: rasterDestination Acceptable values: - Path for new raster layer SCA: Specific Catchment Area Argument type: rasterDestination Acceptable values: - Path for new raster layer PREPROCESSING: Preprocessing Default value: 1 Argument type: enum Available values: - 0: (0) Fill Sinks (Wang & Liu) - 1: (1) Sink Removal Acceptable values: - Number of selected option, e.g. '1' - Comma separated list of options, e.g. '1,3' FLOW_ROUTING: Flow Routing Default value: 4 Argument type: enum Available values: - 0: (0) Deterministic 8 - 1: (1) Rho 8 - 2: (2) Braunschweiger Reliefmodell - 3: (3) Deterministic Infinity - 4: (4) Multiple Flow Direction - 5: (5) Multiple Triangular Flow Direction - 6: (6) Multiple Maximum Downslope Gradient Based Flow Direction Acceptable values: - Number of selected option, e.g. '1' - Comma separated list of options, e.g. '1,3'

sagang_flowaccumulationonestep(
  DEM = qgisprocess:::qgis_default_value(),
  TCA = qgisprocess:::qgis_default_value(),
  SCA = qgisprocess:::qgis_default_value(),
  PREPROCESSING = qgisprocess:::qgis_default_value(),
  FLOW_ROUTING = qgisprocess:::qgis_default_value(),
  ...,
  .complete_output = .complete_output_option(),
  .quiet = .quiet_option(),
  .messages = .message_option()
)

Arguments

DEM

raster - Elevation. Path to a raster layer.

TCA

rasterDestination - Flow Accumulation. Path for new raster layer.

SCA

rasterDestination - Specific Catchment Area. Path for new raster layer.

PREPROCESSING

enum of ("(0) Fill Sinks (Wang & Liu)", "(1) Sink Removal") - Preprocessing. Number of selected option, e.g. '1'. Comma separated list of options, e.g. '1,3'.

FLOW_ROUTING

enum of ("(0) Deterministic 8", "(1) Rho 8", "(2) Braunschweiger Reliefmodell", "(3) Deterministic Infinity", "(4) Multiple Flow Direction", "(5) Multiple Triangular Flow Direction", "(6) Multiple Maximum Downslope Gradient Based Flow Direction") - Flow Routing. Number of selected option, e.g. '1'. Comma separated list of options, e.g. '1,3'.

...

further parameters passed to qgisprocess::qgis_run_algorithm()

.complete_output

logical specifying if complete out of qgisprocess::qgis_run_algorithm() should be used (TRUE) or first output (most likely the main) should read (FALSE). Default value is TRUE.

.quiet

logical specifying if parameter .quiet for qgisprocess::qgis_run_algorithm() Default value is TRUE.

.messages

logical specifying if messages from qgisprocess::qgis_run_algorithm() should be printed (TRUE) or not (FALSE). Default value is FALSE.

Details

Outputs description

  • SCA - outputRaster - Specific Catchment Area

  • TCA - outputRaster - Flow Accumulation