Soil Water Simulation after Glugla (Table)
- Author: O.Conrad (c) 2020
- Menu: Simulation | Soil Hydrology
Description
A simple model for daily soil water simulation based on the approach of Glugla (1969). This is a re-implementation of the formulas used in the 'Simpel' model developed by H_rmann (1998), "...covering the lowest, serious end of hydrologic computing".
References
- Simpel Homepage
- Bonta, J.V., M_ller, M. (1999): Evaluation of the Glugla method for estimating evapotranspiration and groundwater recharge. Hydrological Sciences Journal, 44(5):743-761. doi:10.1080/02626669909492271.
- Glugla, G. (1969): Berechnungsverfahren zur Ermittlung des aktuellen Wassergehalts und Gravitationswasserabflusses im Boden. Archives of Agronomy and Soil Science, 13(4):371-376. doi:10.1080/03650346909413005.
- H_rmann, G. (1997): SIMPEL - ein einfaches, benutzerfreundliches Bodenwassermodell zum Einsatz in der Ausbildung. Deutsche Gew_sserkundliche Mitteilungen 41(2):67-72. PDF (unpublished english translation).
Parameters
Name | Type | Identifier | Description | Constraints | |
---|---|---|---|---|---|
Input | Input | table, input | INPUT | - | - |
Output | Simulation | table, output | SIMULATION | - | - |
Options | Day Identifier | table field | INPUT_DAY | Day specifier, e.g. a date field. | - |
Precipitation | table field | INPUT_P | [mm] | - | |
Potential Evapotranspiration | table field | INPUT_ETP | [mm] | - | |
Leaf Area Index | table field | INPUT_LAI | - | - | |
Default | floating point number | INPUT_LAI_DEFAULT | default value if no attribute has been selected | Default: 0.000000 | |
Interception Capacity | floating point number | I_MAX | Leaf interception capacity [mm] at maximum LAI. | Minimum: 0.000000 Default: 2.000000 | |
Minimum LAI | floating point number | LAI_MIN | Minimum leaf area index. | Minimum: 0.000000 Default: 0.100000 | |
Maximum LAI | floating point number | LAI_MAX | Maximum leaf area index. | Minimum: 0.000000 Default: 4.000000 | |
Litter Capacity | floating point number | LITTER_MAX | [mm] | Minimum: 0.000000 Default: 0.000000 | |
Litter Drying Factor | floating point number | LITTER_CF | Curvature factor determining the drying of the litter storage. | Minimum: 0.000000 Default: 3.000000 | |
Initial Litter Water Content | floating point number | LITTER_0 | [mm] | Minimum: 0.000000 Default: 0.000000 | |
Glugla Coefficient | floating point number | GLUGLA | Empirical parameter [mm/day], depends on soil texture and structure. | Minimum: 0.000000 Default: 150.000000 | |
Rooting | boolean | DO_ROOTING | - | Default: 0 | |
Output Unit | choice | OUTPUT_UNIT | - | Available Choices: [0] mm [1] vol.% [2] percent of field capacity Default: 0 | |
Soil Layers | static table | SOIL_LAYERS | Provide a row for each soil layer: depth [cm], field capacity [vol.%], permanent wilting point [vol.%], maximum ET [vol.%/day], rooting [% of total], initial water content [vol.%]. | 6 Fields: - 1. [8 byte floating point number] Size - 2. [8 byte floating point number] FC - 3. [8 byte floating point number] PWP - 4. [8 byte floating point number] ETmax - 5. [8 byte floating point number] Rooting - 6. [8 byte floating point number] Water_0 | |
Show Diagram | choice [GUI] | DIAGRAM | - | Available Choices: [0] no [1] yes [2] yes, force update Default: 2 |
Command Line
Usage: saga_cmd sim_hydrology 10 [-INPUT] [-INPUT_DAY ] [-INPUT_P ] [-INPUT_ETP ] [-INPUT_LAI ] [-INPUT_LAI_DEFAULT ] [-SIMULATION ] [-I_MAX ] [-LAI_MIN ] [-LAI_MAX ] [-LITTER_MAX ] [-LITTER_CF ] [-LITTER_0 ] [-GLUGLA ] [-DO_ROOTING ] [-OUTPUT_UNIT ] [-SOIL_LAYERS ] -INPUT: Input table, input -INPUT_DAY: Day Identifier table field -INPUT_P: Precipitation table field -INPUT_ETP: Potential Evapotranspiration table field -INPUT_LAI: Leaf Area Index table field -INPUT_LAI_DEFAULT: Default floating point number Default: 0.000000 -SIMULATION: Simulation table, output -I_MAX: Interception Capacity floating point number Minimum: 0.000000 Default: 2.000000 -LAI_MIN: Minimum LAI floating point number Minimum: 0.000000 Default: 0.100000 -LAI_MAX: Maximum LAI floating point number Minimum: 0.000000 Default: 4.000000 -LITTER_MAX: Litter Capacity floating point number Minimum: 0.000000 Default: 0.000000 -LITTER_CF: Litter Drying Factor floating point number Minimum: 0.000000 Default: 3.000000 -LITTER_0: Initial Litter Water Content floating point number Minimum: 0.000000 Default: 0.000000 -GLUGLA: Glugla Coefficient floating point number Minimum: 0.000000 Default: 150.000000 -DO_ROOTING: Rooting boolean Default: 0 -OUTPUT_UNIT: Output Unit choice Available Choices: [0] mm [1] vol.% [2] percent of field capacity Default: 0 -SOIL_LAYERS: Soil Layers static table 6 Fields: - 1. [8 byte floating point number] Size - 2. [8 byte floating point number] FC - 3. [8 byte floating point number] PWP - 4. [8 byte floating point number] ETmax - 5. [8 byte floating point number] Rooting - 6. [8 byte floating point number] Water_0