QGIS algorithm - Overland flow distance to channel network

Source: R/sagang_overlandflowdistancetochannelnetwork.R

QGIS Algorithm provided by SAGA Next Gen Overland flow distance to channel network (sagang:overlandflowdistancetochannelnetwork). —————- Arguments —————- ELEVATION: Elevation Argument type: raster Acceptable values: - Path to a raster layer CHANNELS: Channel Network Argument type: raster Acceptable values: - Path to a raster layer ROUTE: Preferred Routing (optional) Argument type: raster Acceptable values: - Path to a raster layer DISTANCE: Overland Flow Distance Argument type: rasterDestination Acceptable values: - Path for new raster layer DISTVERT: Vertical Overland Flow Distance Argument type: rasterDestination Acceptable values: - Path for new raster layer DISTHORZ: Horizontal Overland Flow Distance Argument type: rasterDestination Acceptable values: - Path for new raster layer TIME: Flow Travel Time Argument type: rasterDestination Acceptable values: - Path for new raster layer SDR: Sediment Yield Delivery Ratio Argument type: rasterDestination Acceptable values: - Path for new raster layer FIELDS: Fields (optional) Argument type: raster Acceptable values: - Path to a raster layer PASSES: Fields Visited Argument type: rasterDestination Acceptable values: - Path for new raster layer METHOD: Flow Algorithm Default value: 1 Argument type: enum Available values: - 0: (0) D8 - 1: (1) MFD Acceptable values: - Number of selected option, e.g. '1' - Comma separated list of options, e.g. '1,3' BOUNDARY: Boundary Cells Default value: false Argument type: boolean Acceptable values: - 1 for true/yes - 0 for false/no - field:FIELD_NAME to use a data defined value taken from the FIELD_NAME field - expression:SOME EXPRESSION to use a data defined value calculated using a custom QGIS expression FLOW_B: Beta Default value: 1 Argument type: number Acceptable values: - A numeric value - field:FIELD_NAME to use a data defined value taken from the FIELD_NAME field - expression:SOME EXPRESSION to use a data defined value calculated using a custom QGIS expression FLOW_K: Manning-Strickler Coefficient (optional) Argument type: raster Acceptable values: - Path to a raster layer FLOW_K_DEFAULT: Default Default value: 20 Argument type: number Acceptable values: - A numeric value - field:FIELD_NAME to use a data defined value taken from the FIELD_NAME field - expression:SOME EXPRESSION to use a data defined value calculated using a custom QGIS expression FLOW_R: Flow Depth (optional) Argument type: raster Acceptable values: - Path to a raster layer FLOW_R_DEFAULT: Default Default value: 0.05 Argument type: number Acceptable values: - A numeric value - field:FIELD_NAME to use a data defined value taken from the FIELD_NAME field - expression:SOME EXPRESSION to use a data defined value calculated using a custom QGIS expression

sagang_overlandflowdistancetochannelnetwork(
  ELEVATION = qgisprocess:::qgis_default_value(),
  CHANNELS = qgisprocess:::qgis_default_value(),
  ROUTE = qgisprocess:::qgis_default_value(),
  DISTANCE = qgisprocess:::qgis_default_value(),
  DISTVERT = qgisprocess:::qgis_default_value(),
  DISTHORZ = qgisprocess:::qgis_default_value(),
  TIME = qgisprocess:::qgis_default_value(),
  SDR = qgisprocess:::qgis_default_value(),
  FIELDS = qgisprocess:::qgis_default_value(),
  PASSES = qgisprocess:::qgis_default_value(),
  METHOD = qgisprocess:::qgis_default_value(),
  BOUNDARY = qgisprocess:::qgis_default_value(),
  FLOW_B = qgisprocess:::qgis_default_value(),
  FLOW_K = qgisprocess:::qgis_default_value(),
  FLOW_K_DEFAULT = qgisprocess:::qgis_default_value(),
  FLOW_R = qgisprocess:::qgis_default_value(),
  FLOW_R_DEFAULT = qgisprocess:::qgis_default_value(),
  ...,
  .complete_output = .complete_output_option(),
  .quiet = .quiet_option(),
  .messages = .message_option()
)

Arguments

ELEVATION

raster - Elevation. Path to a raster layer.

CHANNELS

raster - Channel Network. Path to a raster layer.

ROUTE

raster - Preferred Routing. Path to a raster layer.

DISTANCE

rasterDestination - Overland Flow Distance. Path for new raster layer.

DISTVERT

rasterDestination - Vertical Overland Flow Distance. Path for new raster layer.

DISTHORZ

rasterDestination - Horizontal Overland Flow Distance. Path for new raster layer.

TIME

rasterDestination - Flow Travel Time. Path for new raster layer.

SDR

rasterDestination - Sediment Yield Delivery Ratio. Path for new raster layer.

FIELDS

raster - Fields. Path to a raster layer.

PASSES

rasterDestination - Fields Visited. Path for new raster layer.

METHOD

enum of ("(0) D8", "(1) MFD") - Flow Algorithm. Number of selected option, e.g. '1'. Comma separated list of options, e.g. '1,3'.

BOUNDARY

boolean - Boundary Cells. 1 for true/yes. 0 for false/no. field:FIELD_NAME to use a data defined value taken from the FIELD_NAME field. expression:SOME EXPRESSION to use a data defined value calculated using a custom QGIS expression.

FLOW_B

number - Beta. A numeric value. field:FIELD_NAME to use a data defined value taken from the FIELD_NAME field. expression:SOME EXPRESSION to use a data defined value calculated using a custom QGIS expression.

FLOW_K

raster - Manning-Strickler Coefficient. Path to a raster layer.

FLOW_K_DEFAULT

number - Default. A numeric value. field:FIELD_NAME to use a data defined value taken from the FIELD_NAME field. expression:SOME EXPRESSION to use a data defined value calculated using a custom QGIS expression.

FLOW_R

raster - Flow Depth. Path to a raster layer.

FLOW_R_DEFAULT

number - Default. A numeric value. field:FIELD_NAME to use a data defined value taken from the FIELD_NAME field. expression:SOME EXPRESSION to use a data defined value calculated using a custom QGIS expression.

...

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

  • DISTANCE - outputRaster - Overland Flow Distance

  • DISTHORZ - outputRaster - Horizontal Overland Flow Distance

  • DISTVERT - outputRaster - Vertical Overland Flow Distance

  • PASSES - outputRaster - Fields Visited

  • SDR - outputRaster - Sediment Yield Delivery Ratio

  • TIME - outputRaster - Flow Travel Time