Module Soil Moisture Content
The WEELS (Wind Erosion on European Light Soils) soil moisture model dynamically calculates the soil moisture based on the rules proposed by the DVWK (1996) with input data about:
- soil properties (grids: field capacity and permanent wilting point)
- land use (grid: crop types)
- climate (table: daily values of precipitation, temperature, air humidity)
References:
- DVWK - Deutscher Verband fuer Wasserwirtschaft und Kulturbau e.V. (1996): 'Ermittlung der Verdunstung von Land- und Wasserflaechen', DVWK Merkblaetter 238/1996, Bonn, 135p.
- Boehner, J., Schaefer, W., Conrad, O., Gross, J., Ringeler, A. (2001): 'The WEELS Model: methods, results and limits of wind erosion modelling', In: Catena, Special Issue
- Author: (c) 2002 by O.Conrad
- Specification: grid
- Menu: Simulation|Hydrology
Parameters
| Name | Type | Identifier | Description | Constraints |
Input | Field Capacity [mm] (*) | Grid (optional input) | STA_FC | - | - |
Permanent Wilting Point [mm] (*) | Grid (optional input) | STA_PWP | - | - |
Land Use (*) | Grid (optional input) | LANDUSE | - | - |
Output | Soil Moisture | Grid (output) | DYN_W | - | - |
Options | Default | Floating point | STA_FC_DEF | - | Minimum: 0.000000 Default: 20.000000 |
Default | Floating point | STA_PWP_DEF | - | Minimum: 0.000000 Default: 2.000000 |
Default | Integer | LANDUSE_DEF | - | Default: -1 |
Climate Data | Static table | DYN_CLIMATE | - | 3 Fields: - 1. [8 byte floating point number] Precipitation [mm] - 2. [8 byte floating point number] Temperature (2pm) [DegreeC] - 3. [8 byte floating point number] Air Humidity (2pm) [%%]
|
Crop Coefficients | Static table | STA_KC | - | 14 Fields: - 1. [signed 4 byte integer] Land Use ID - 2. [string] Name - 3. [8 byte floating point number] January - 4. [8 byte floating point number] February - 5. [8 byte floating point number] March - 6. [8 byte floating point number] April - 7. [8 byte floating point number] May - 8. [8 byte floating point number] June - 9. [8 byte floating point number] July - 10. [8 byte floating point number] August - 11. [8 byte floating point number] September - 12. [8 byte floating point number] October - 13. [8 byte floating point number] November - 14. [8 byte floating point number] December
|
(*) optional |
Command-line
Usage: saga_cmd sim_hydrology 0 [-STA_FC <str>] [-STA_FC_DEF <str>] [-STA_PWP <str>] [-STA_PWP_DEF <str>] [-LANDUSE <str>] [-LANDUSE_DEF <num>] [-DYN_W <str>] [-DYN_CLIMATE <str>] [-STA_KC <str>]
-STA_FC:<str> Field Capacity [mm]
Grid (optional input)
-STA_FC_DEF:<str> Default
Floating point
Minimum: 0.000000
Default: 20.000000
-STA_PWP:<str> Permanent Wilting Point [mm]
Grid (optional input)
-STA_PWP_DEF:<str> Default
Floating point
Minimum: 0.000000
Default: 2.000000
-LANDUSE:<str> Land Use
Grid (optional input)
-LANDUSE_DEF:<num> Default
Integer
Default: -1
-DYN_W:<str> Soil Moisture
Grid (output)
-DYN_CLIMATE:<str> Climate Data
Static table
3 Fields:
- 1. [8 byte floating point number] Precipitation [mm]
- 2. [8 byte floating point number] Temperature (2pm) [DegreeC]
- 3. [8 byte floating point number] Air Humidity (2pm) [%]
-STA_KC:<str> Crop Coefficients
Static table
14 Fields:
- 1. [signed 4 byte integer] Land Use ID
- 2. [string] Name
- 3. [8 byte floating point number] January
- 4. [8 byte floating point number] February
- 5. [8 byte floating point number] March
- 6. [8 byte floating point number] April
- 7. [8 byte floating point number] May
- 8. [8 byte floating point number] June
- 9. [8 byte floating point number] July
- 10. [8 byte floating point number] August
- 11. [8 byte floating point number] September
- 12. [8 byte floating point number] October
- 13. [8 byte floating point number] November
- 14. [8 byte floating point number] December