Overland Flow

Author: O.Conrad (c) 2020
Menu: Simulation | Hydrology

Description

A simple overland flow simulation.

Parameters

	Name	Type	Identifier	Description	Constraints
Input	Elevation	grid, input	`DEM`	-	-
	Roughness	grid, input, optional	`ROUGHNESS`	Ks Strickler = 1/n Manning	-
	Interception Capacity [mm]	grid, input, optional	`INTER_MAX`	-	-
	Ponding Capacity [mm]	grid, input, optional	`POND_MAX`	-	-
	Infiltration Capacity [mm/h]	grid, input, optional	`INFIL_MAX`	-	-
	Precipitation [mm/h]	grid, input, optional	`PRECIP`	-	-
	Potential Evapotranspiration [mm/h]	grid, input, optional	`ET_POT`	-	-
Output	Interception [mm]	grid, output	`INTERCEPT`	-	-
	Ponding [mm]	grid, output	`PONDING`	-	-
	Infiltration [mm]	grid, output	`INFILTRAT`	-	-
	Flow [mm]	grid, output	`FLOW`	-	-
	Velocity [m/h]	grid, output, optional	`VELOCITY`	-	-
	Overland Flow Summary	table, output, optional	`SUMMARY`	-	-
Options	Grid System	grid system	`PARAMETERS_GRID_SYSTEM`	-	-
	Default	floating point number	`ROUGHNESS_DEFAULT`	default value if no grid has been selected	Minimum: 0.000000 Default: 20.000000
	Type	choice	`STRICKLER`	Ks Strickler = 1/n Gauckler-Manning	Available Choices: [0] Strickler Ks, [m^1/3 / s] [1] Gauckler-Manning n, [s / m^1/3] Default: 0
	Default	floating point number	`INTER_MAX_DEFAULT`	default value if no grid has been selected	Minimum: 0.000000 Default: 0.000000
	Default	floating point number	`POND_MAX_DEFAULT`	default value if no grid has been selected	Minimum: 0.000000 Default: 0.000000
	Default	floating point number	`INFIL_MAX_DEFAULT`	default value if no grid has been selected	Minimum: 0.000000 Default: 0.000000
	Weather Grid System	grid system	`WEATHER`	-	-
	Default	floating point number	`PRECIP_DEFAULT`	default value if no grid has been selected	Minimum: 0.000000 Default: 0.000000
	Default	floating point number	`ET_POT_DEFAULT`	default value if no grid has been selected	Minimum: 0.000000 Default: 0.000000
	Reset	boolean	`RESET`	If checked storages (flow, ponding, interception) and sinks (infiltration) will be set to zero.	Default: 1
	Simulation Time [h]	floating point number	`TIME_STOP`	Simulation time in hours.	Minimum: 0.000000 Default: 6.000000
	Time Step Adjustment	floating point number	`TIME_STEP`	Choosing a lower value will result in a better numerical precision but also in a longer calculation time.	Minimum: 0.010000 Maximum: 1.000000 Default: 0.500000
	Overland Flow Summary	boolean	`FLOW_OUT`	Report the amount of overland flow that left the covered area.	Default: 0
	Map Update Frequency [Minutes]	floating point number	`TIME_UPDATE`	Map update frequency in minutes. Set to zero to update each simulation time step.	Minimum: 0.000000 Default: 1.000000
	Fixed Color Stretch for Flow	boolean	`UPDATE_FLOW_FIXED`	-	Default: 0
	Fixed Color Stretch	value range	`UPDATE_FLOW_RANGE`	-	-
	Fixed Color Stretch for Velocity	boolean	`UPDATE_VELO_FIXED`	-	Default: 1
	Fixed Color Stretch	value range	`UPDATE_VELO_RANGE`	-	-

Command Line

Usage: saga_cmd sim_hydrology 9 [-DEM ] [-ROUGHNESS ] [-ROUGHNESS_DEFAULT ] [-STRICKLER ] [-INTER_MAX ] [-INTER_MAX_DEFAULT ] [-POND_MAX ] [-POND_MAX_DEFAULT ] [-INFIL_MAX ] [-INFIL_MAX_DEFAULT ] [-INTERCEPT ] [-PONDING ] [-INFILTRAT ] [-FLOW ] [-VELOCITY ] [-PRECIP ] [-PRECIP_DEFAULT ] [-ET_POT ] [-ET_POT_DEFAULT ] [-RESET ] [-TIME_STOP ] [-TIME_STEP ] [-FLOW_OUT ] [-SUMMARY ] [-TIME_UPDATE ] [-UPDATE_FLOW_FIXED ] [-UPDATE_FLOW_RANGE_MIN ] [-UPDATE_FLOW_RANGE_MAX ] [-UPDATE_VELO_FIXED ] [-UPDATE_VELO_RANGE_MIN ] [-UPDATE_VELO_RANGE_MAX ]
  -DEM:                     	Elevation
	grid, input
  -ROUGHNESS:               	Roughness
	grid, input, optional
  -ROUGHNESS_DEFAULT:    	Default
	floating point number
	Minimum: 0.000000
	Default: 20.000000
  -STRICKLER:               	Type
	choice
	Available Choices:
	[0] Strickler Ks, [m^1/3 / s]
	[1] Gauckler-Manning n, [s / m^1/3]
	Default: 0
  -INTER_MAX:               	Interception Capacity [mm]
	grid, input, optional
  -INTER_MAX_DEFAULT:    	Default
	floating point number
	Minimum: 0.000000
	Default: 0.000000
  -POND_MAX:                	Ponding Capacity [mm]
	grid, input, optional
  -POND_MAX_DEFAULT:     	Default
	floating point number
	Minimum: 0.000000
	Default: 0.000000
  -INFIL_MAX:               	Infiltration Capacity [mm/h]
	grid, input, optional
  -INFIL_MAX_DEFAULT:    	Default
	floating point number
	Minimum: 0.000000
	Default: 0.000000
  -INTERCEPT:               	Interception [mm]
	grid, output
  -PONDING:                 	Ponding [mm]
	grid, output
  -INFILTRAT:               	Infiltration [mm]
	grid, output
  -FLOW:                    	Flow [mm]
	grid, output
  -VELOCITY:                	Velocity [m/h]
	grid, output, optional
  -PRECIP:                  	Precipitation [mm/h]
	grid, input, optional
  -PRECIP_DEFAULT:       	Default
	floating point number
	Minimum: 0.000000
	Default: 0.000000
  -ET_POT:                  	Potential Evapotranspiration [mm/h]
	grid, input, optional
  -ET_POT_DEFAULT:       	Default
	floating point number
	Minimum: 0.000000
	Default: 0.000000
  -RESET:                   	Reset
	boolean
	Default: 1
  -TIME_STOP:            	Simulation Time [h]
	floating point number
	Minimum: 0.000000
	Default: 6.000000
  -TIME_STEP:            	Time Step Adjustment
	floating point number
	Minimum: 0.010000
	Maximum: 1.000000
	Default: 0.500000
  -FLOW_OUT:                	Overland Flow Summary
	boolean
	Default: 0
  -SUMMARY:                 	Overland Flow Summary
	table, output, optional
  -TIME_UPDATE:          	Map Update Frequency [Minutes]
	floating point number
	Minimum: 0.000000
	Default: 1.000000
  -UPDATE_FLOW_FIXED:       	Fixed Color Stretch for Flow
	boolean
	Default: 0
  -UPDATE_FLOW_RANGE_MIN:	Fixed Color Stretch
	value range
  -UPDATE_FLOW_RANGE_MAX:	Fixed Color Stretch
	value range
  -UPDATE_VELO_FIXED:       	Fixed Color Stretch for Velocity
	boolean
	Default: 1
  -UPDATE_VELO_RANGE_MIN:	Fixed Color Stretch
	value range
  -UPDATE_VELO_RANGE_MAX:	Fixed Color Stretch
	value range