Aquifer Data Fields (SWMM)
Aquifer data can be edited on either the Aquifer Grid Window of the Subcatchments Grid or the Aquifer Property Sheet.
This table describes all the data fields used to define an Aquifer.
Common Data Fields Fields that are common to the majority of objects can be found in the Common Fields topic.
Aquifer Data
Database Table Name: sw_aquifer
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Field Name |
Help Text |
Database Field |
Size |
Precision |
Default |
Error Lower Limit |
Error Upper Limit |
Warning Lower Limit |
Warning Upper Limit |
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Aquifer ID |
The unique name that is used to identify this aquifer. |
id |
Text |
254 |
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| Soil porosity | Volume of voids / total soil volume. | soil_porosity | Double | 3 | 0.500 | 0 | 1 | ||||
| Soil wilting point | Soil moisture content at which plants cannot survive. This must be between 0 and 1. | soil_wilting_point | Double | 3 | 0.150 | 0 | 1 | ||||
| Soil field capacity | Soil moisture content after all free water has drained off. | soil_field_capacity | Double | 3 | 0.300 | 0 | 1 | ||||
| Conductivity | The soil's saturated hydraulic conductivity. | conductivity | Double | I | 3 | 127 | 0 | ||||
| Conductivity slope | Average slope of log (conductivity) versus soil moisture deficit (porosity minus moisture content) curve. | conductivity_slope | Double | I | 3 | 254 | |||||
| Tension slope | Average slope of soil tension versus soil moisture content curve. | tension_slope | Double | RD | 3 | 381 | |||||
| Evapotranspiration fraction | Fraction of total evaporation available for evapotranspiration in the unsaturated part of the aquifer. | evapotranspiration_fraction | Double | 3 | 0.350 | 0 | 1 | ||||
| Evapotranspiration depth | Maximum depth below the surface at which evapotranspiration from the saturated part of the aquifer can still occur. | evapotranspiration_depth | Double | Y | 3 | 4.2672 | 0 | ||||
| Seepage rate | Rate of percolation to deep groundwater when the water table reaches the ground surface. | seepage_rate | Double | I | 3 | 0.0508 | 0 | ||||
| Elevation | The elevation at the bottom of the aquifer. | elevation | Double | Z | 3 | ||||||
| Initial groundwater | The level of the groundwater at the start of the simulation. | initial_groundwater | Double | Z | 3 | ||||||
| Initial moisture content | The moisture content of the unsaturated part of the aquifer at the start of the simulation. | initial_moisture_content | Double | 3 | 0.3000 | 0 | 1 | ||||
| Time pattern ID | The name or identifier of the monthly time pattern of adjustments applied to the Evapotranspiration fraction. | time_pattern_id | Text | 254 |
