Module Diffuse Pollution Risk
Diffuse Pollution Risk Mapping.
This tool tries to reproduce in parts the methodology of the SCIMAP - Diffuse Pollution Risk Mapping - Framework.
References:
Lane, S.N.; Brookes, C.J.; Kirkby, M.J.; Holden, J. (2004): A network-index-based version of TOPMODEL for use with high-resolution digital topographic data. In: Hydrological processes. Vol. 18, S. 191-201.
Milledge, D.G.; Lane, N.S.; Heathwait, A.L.; Reaney, S.M. (2012): A monte carlo approach to the invers problem of diffuse pollution risk in agricultural catchments. In: Science of the Total Environment. Vol. 433, S. 434-449.
- Author: Cosima Berger, Olaf Conrad (c) 2014
- Specification: grid
- Menu: Simulation|Hydrology
Parameters
| | Name | Type | Identifier | Description | Constraints |
|---|
| Input | Elevation | Grid (input) | DEM | - | - |
| Channel Network (*) | Grid (optional input) | CHANNEL | - | - |
| Land Cover Weights (*) | Grid (optional input) | WEIGHT | - | - |
| Rainfall (*) | Grid (optional input) | RAIN | - | - |
| Output | Delivery Index | Grid (output) | DELIVERY | - | - |
| Locational Risk | Grid (output) | RISK_POINT | - | - |
| Diffuse Pollution Risk | Grid (output) | RISK_DIFFUSE | - | - |
| Options | Default | Floating point | WEIGHT_DEFAULT | default value if no grid has been selected | Minimum: 0.000000
Default: 1.000000 |
| Default | Floating point | RAIN_DEFAULT | default value if no grid has been selected | Minimum: 0.000000
Default: 500.000000 |
| Flow Direction Algorithm | Choice | METHOD | - | Available Choices:
[0] single
[1] multiple
Default: 1 |
| Channel Initiation Threshold | Integer | CHANNEL_START | minimum number of upslope contributing cells to start a channel | Minimum: 1
Default: 150 |
| (*) optional |
Command-line
Usage: saga_cmd sim_hydrology 4 [-DEM <str>] [-CHANNEL <str>] [-WEIGHT <str>] [-WEIGHT_DEFAULT <str>] [-RAIN <str>] [-RAIN_DEFAULT <str>] [-DELIVERY <str>] [-RISK_POINT <str>] [-RISK_DIFFUSE <str>] [-METHOD <str>] [-CHANNEL_START <num>]
-DEM:<str> Elevation
Grid (input)
-CHANNEL:<str> Channel Network
Grid (optional input)
-WEIGHT:<str> Land Cover Weights
Grid (optional input)
-WEIGHT_DEFAULT:<str> Default
Floating point
Minimum: 0.000000
Default: 1.000000
-RAIN:<str> Rainfall
Grid (optional input)
-RAIN_DEFAULT:<str> Default
Floating point
Minimum: 0.000000
Default: 500.000000
-DELIVERY:<str> Delivery Index
Grid (output)
-RISK_POINT:<str> Locational Risk
Grid (output)
-RISK_DIFFUSE:<str> Diffuse Pollution Risk
Grid (output)
-METHOD:<str> Flow Direction Algorithm
Choice
Available Choices:
[0] single
[1] multiple
Default: 1
-CHANNEL_START:<num> Channel Initiation Threshold
Integer
Minimum: 1
Default: 150