Top Soil Water Content
- Author: O.Conrad (c) 2002
- Menu: Simulation | Soil Hydrology
Description
The WEELS (Wind Erosion on European Light Soils) soil moisture model estimates the top soil water content on a daily basis using the Haude approach for evapotranspiration (cf. DVWK 1996). Input data is
- daily weather
- precipitation
- temperature
- air humidity
- soil properties
- field capacity
- permanent wilting point
- crop type
References
- 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. doi:10.1016/S0341-8162(03)00019-5.
- DVWK (Deutscher Verband fuer Wasserwirtschaft und Kulturbau) (1996): Determination of evaporation and transpiration from land and water surfaces. DVWK Leaflet Series for Water Management no.238, Bonn, 135p. DVWK-M 238.
Parameters
| | Name | Type | Identifier | Description | Constraints |
|---|
| Input | Field Capacity | grid, input, optional | STA_FC | [mm] | - |
| Permanent Wilting Point | grid, input, optional | STA_PWP | [mm] | - |
| Land Use | grid, input, optional | LANDUSE | - | - |
| Output | Soil Moisture | grid, output | DYN_W | - | - |
| Options | Grid System | grid system | PARAMETERS_GRID_SYSTEM | - | - |
| Default | floating point number | STA_FC_DEFAULT | default value if no grid has been selected | Minimum: 0.000000
Maximum: 100.000000
Default: 20.000000 |
| Default | floating point number | STA_PWP_DEFAULT | default value if no grid has been selected | Minimum: 0.000000
Maximum: 100.000000
Default: 2.000000 |
| Default | integer number | 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 Deg.C]
- 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
|
Command Line
Usage: saga_cmd sim_hydrology 0 [-STA_FC ] [-STA_FC_DEFAULT ] [-STA_PWP ] [-STA_PWP_DEFAULT ] [-LANDUSE ] [-LANDUSE_DEF ] [-DYN_W ] [-DYN_CLIMATE ] [-STA_KC ]
-STA_FC: Field Capacity
grid, input, optional
-STA_FC_DEFAULT: Default
floating point number
Minimum: 0.000000
Maximum: 100.000000
Default: 20.000000
-STA_PWP: Permanent Wilting Point
grid, input, optional
-STA_PWP_DEFAULT: Default
floating point number
Minimum: 0.000000
Maximum: 100.000000
Default: 2.000000
-LANDUSE: Land Use
grid, input, optional
-LANDUSE_DEF: Default
integer number
Default: -1
-DYN_W: Soil Moisture
grid, output
-DYN_CLIMATE: Climate Data
static table
3 Fields:
- 1. [8 byte floating point number] Precipitation [mm]
- 2. [8 byte floating point number] Temperature [2pm Deg.C]
- 3. [8 byte floating point number] Air Humidity [2pm [%]
-STA_KC: 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