Recursive upward processing of cells for calculation of flow accumulation and related parameters. This set of algorithms processes recursively all upwards connected cells until each cell of the DEM has been processed.
Flow routing methods provided by this tool:
| Name | Type | Identifier | Description | Constraints |
Input | Elevation | Grid (input) | ELEVATION | - | - |
Sink Routes (*) | Grid (optional input) | SINKROUTE | - | - |
Weights (*) | Grid (optional input) | WEIGHTS | - | - |
Input for Mean over Catchment (*) | Grid (optional input) | VAL_INPUT | - | - |
Material for Accumulation (*) | Grid (optional input) | ACCU_MATERIAL | - | - |
Accumulation Target | Grid (input) | ACCU_TARGET | - | - |
Target Areas (*) | Grid (optional input) | TARGETS | - | - |
Output | Flow Accumulation | Grid (output) | FLOW | - | - |
Mean over Catchment | Grid (output) | VAL_MEAN | - | - |
Accumulated Material (*) | Grid (optional output) | ACCU_TOTAL | - | - |
Accumulated Material (Left Side) (*) | Grid (optional output) | ACCU_LEFT | - | - |
Accumulated Material (Right Side) (*) | Grid (optional output) | ACCU_RIGHT | - | - |
Flow Path Length (*) | Grid (optional output) | FLOW_LENGTH | average distance that a cell's accumulated flow travelled | - |
Loss through Negative Weights (*) | Grid (optional output) | WEIGHT_LOSS | when using weights without support for negative flow: output of the absolute amount of negative flow that occurred | - |
Options | Grid system | Grid system | PARAMETERS_GRID_SYSTEM | - | - |
Flow Accumulation Unit | Choice | FLOW_UNIT | - | Available Choices: [0] number of cells [1] cell area Default: 1 |
Method | Choice | METHOD | - | Available Choices: [0] Deterministic 8 [1] Rho 8 [2] Deterministic Infinity [3] Multiple Flow Direction Default: 3 |
Convergence | Floating point | CONVERGENCE | Convergence factor for Multiple Flow Direction Algorithm (Freeman 1991) | Minimum: 0.000000 Default: 1.100000 |
Prevent Negative Flow Accumulation | Boolean | NO_NEGATIVES | when using weights: do not transport negative flow, set it to zero instead; useful e.g. when accumulating measures of water balance. | Default: 1 |
(*) optional |