QGIS algorithm - Quasi-dynamic flow accumulation

Source: R/sagang_quasidynamicflowaccumulation.R

QGIS Algorithm provided by SAGA Next Gen Quasi-dynamic flow accumulation (sagang:quasidynamicflowaccumulation). —————- Arguments —————- DEM: Elevation Argument type: raster Acceptable values: - Path to a raster layer 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_ACC: Flow Accumulation Argument type: rasterDestination Acceptable values: - Path for new raster layer FLOW: Flow Through Argument type: rasterDestination Acceptable values: - Path for new raster layer TIME_MEAN: Flow Travel Time Argument type: rasterDestination Acceptable values: - Path for new raster layer TIME_CONC: Flow Concentration Argument type: rasterDestination Acceptable values: - Path for new raster layer VELOCITY: Flow Velocity Argument type: rasterDestination Acceptable values: - Path for new raster layer TIME: Time Default value: 5 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 ROUTING: Flow Routing 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' FLOW_DEPTH: Flow Depth Default value: 1 Argument type: enum Available values: - 0: (0) constant - 1: (1) dynamic Acceptable values: - Number of selected option, e.g. '1' - Comma separated list of options, e.g. '1,3' FLOW_CONST: Constant Flow Depth Default value: 10 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 RESET: Reset Default value: true 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 RAIN: Rain Default value: 10 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_quasidynamicflowaccumulation(
  DEM = qgisprocess:::qgis_default_value(),
  FLOW_K = qgisprocess:::qgis_default_value(),
  FLOW_K_DEFAULT = qgisprocess:::qgis_default_value(),
  FLOW_ACC = qgisprocess:::qgis_default_value(),
  FLOW = qgisprocess:::qgis_default_value(),
  TIME_MEAN = qgisprocess:::qgis_default_value(),
  TIME_CONC = qgisprocess:::qgis_default_value(),
  VELOCITY = qgisprocess:::qgis_default_value(),
  TIME = qgisprocess:::qgis_default_value(),
  ROUTING = qgisprocess:::qgis_default_value(),
  FLOW_DEPTH = qgisprocess:::qgis_default_value(),
  FLOW_CONST = qgisprocess:::qgis_default_value(),
  RESET = qgisprocess:::qgis_default_value(),
  RAIN = qgisprocess:::qgis_default_value(),
  ...,
  .complete_output = .complete_output_option(),
  .quiet = .quiet_option(),
  .messages = .message_option()
)

Arguments

DEM

raster - Elevation. Path to a raster layer.

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_ACC

rasterDestination - Flow Accumulation. Path for new raster layer.

FLOW

rasterDestination - Flow Through. Path for new raster layer.

TIME_MEAN

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

TIME_CONC

rasterDestination - Flow Concentration. Path for new raster layer.

VELOCITY

rasterDestination - Flow Velocity. Path for new raster layer.

TIME

number - Time. 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.

ROUTING

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

FLOW_DEPTH

enum of ("(0) constant", "(1) dynamic") - Flow Depth. Number of selected option, e.g. '1'. Comma separated list of options, e.g. '1,3'.

FLOW_CONST

number - Constant Flow Depth. 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.

RESET

boolean - Reset. 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.

RAIN

number - Rain. 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

  • FLOW - outputRaster - Flow Through

  • FLOW_ACC - outputRaster - Flow Accumulation

  • TIME_CONC - outputRaster - Flow Concentration

  • TIME_MEAN - outputRaster - Flow Travel Time

  • VELOCITY - outputRaster - Flow Velocity