SAGA 9.4.2 | Tool Library Documentation

Overland Flow (Kinematic Wave)


Description

This is a simple tool that simulates overland flow with a kinematic wave approach. It is not designed for operational usage. Rather it should give an idea about some principles of dynamic simulation techniques and thus it might become a starting point for more sophisticated and applicable simulation tools.


References


Parameters

 NameTypeIdentifierDescriptionConstraints
InputElevationgrid, inputDEM--
Manning Roughnessgrid, input, optionalROUGHNESS--
Gaugesshapes, input, optionalGAUGES--
OutputRunoffgrid, outputFLOW--
Flow at Gaugestable, output, optionalGAUGES_FLOW--
OptionsGrid Systemgrid systemPARAMETERS_GRID_SYSTEM--
Defaultfloating point numberROUGHNESS_DEFAULTdefault value if no grid has been selectedMinimum: 0.000000 Default: 0.030000
Simulation Time [h]floating point numberTIME_SPAN-Minimum: 0.000000 Default: 1.000000
Simulation Time Step [min]floating point numberTIME_STEP-Minimum: 0.000000 Default: 1.000000
Map Update Frequency [min]floating point numberTIME_UPDATEIf zero each simulation time step will update the flow map.Minimum: 0.000000 Default: 1.000000
Maximum Iterationsinteger numberMAXITER-Minimum: 1 Default: 100
Epsilonfloating point numberEPSILON-Minimum: 0.000000 Default: 0.000100
Flow RoutingchoiceROUTING-Available Choices: [0] Deterministic 8 [1] Multiple Flow Direction Default: 1
Dynamic Water SurfacebooleanDYNAMIC-Default: 1
ResetbooleanFLOW_RESET-Default: 1
Precipitation [mm]floating point numberP_RATE-Default: 10.000000
PrecipitationchoiceP_DISTRIB-Available Choices: [0] Homogenous [1] Above Elevation [2] Left Half Default: 0
Above Elevationfloating point numberP_THRESHOLD-Default: 0.000000

Command Line


Usage: saga_cmd sim_hydrology 1 [-DEM ] [-ROUGHNESS ] [-ROUGHNESS_DEFAULT ] [-FLOW ] [-GAUGES_FLOW ] [-GAUGES ] [-TIME_SPAN ] [-TIME_STEP ] [-TIME_UPDATE ] [-MAXITER ] [-EPSILON ] [-ROUTING ] [-DYNAMIC ] [-FLOW_RESET ] [-P_RATE ] [-P_DISTRIB ] [-P_THRESHOLD ]
  -DEM:                 	Elevation
	grid, input
  -ROUGHNESS:           	Manning Roughness
	grid, input, optional
  -ROUGHNESS_DEFAULT:	Default
	floating point number
	Minimum: 0.000000
	Default: 0.030000
  -FLOW:                	Runoff
	grid, output
  -GAUGES_FLOW:         	Flow at Gauges
	table, output, optional
  -GAUGES:              	Gauges
	shapes, input, optional
  -TIME_SPAN:        	Simulation Time [h]
	floating point number
	Minimum: 0.000000
	Default: 1.000000
  -TIME_STEP:        	Simulation Time Step [min]
	floating point number
	Minimum: 0.000000
	Default: 1.000000
  -TIME_UPDATE:      	Map Update Frequency [min]
	floating point number
	Minimum: 0.000000
	Default: 1.000000
  -MAXITER:             	Maximum Iterations
	integer number
	Minimum: 1
	Default: 100
  -EPSILON:          	Epsilon
	floating point number
	Minimum: 0.000000
	Default: 0.000100
  -ROUTING:             	Flow Routing
	choice
	Available Choices:
	[0] Deterministic 8
	[1] Multiple Flow Direction
	Default: 1
  -DYNAMIC:             	Dynamic Water Surface
	boolean
	Default: 1
  -FLOW_RESET:          	Reset
	boolean
	Default: 1
  -P_RATE:           	Precipitation [mm]
	floating point number
	Default: 10.000000
  -P_DISTRIB:           	Precipitation
	choice
	Available Choices:
	[0] Homogenous
	[1] Above Elevation
	[2] Left Half
	Default: 0
  -P_THRESHOLD:      	Above Elevation
	floating point number
	Default: 0.000000