Description
Return 1+(suctionHead+pondingHead) × moistureDeficit/cumulativeInfiltration and cumulativeInfiltration/moistureDeficit.
Groundwater components relate hydraulic head, storage, porosity, and supplied flow parameters. A local equation uses a declared aquifer model; it does not establish that model from field observations.
Return 1+(suctionHead+pondingHead) × moistureDeficit/cumulativeInfiltration and cumulativeInfiltration/moistureDeficit.
When to use this tool
Use Infiltration Green Ampt Driving Head when you need one explicit groundwater or soil-storage component.
How to use the tool and how it works
- Enter suctionHead, pondingHead, moistureDeficit, cumulativeInfiltration. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read capacityFactor, wettingFrontDepth. Use the output convention below.
Require nonnegative suctionHead and pondingHead, moistureDeficit in (0, 1], and positive cumulativeInfiltration. Return 1+(suctionHead+pondingHead) × moistureDeficit/cumulativeInfiltration and cumulativeInfiltration/moistureDeficit.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| suctionHead | Suction Head | Required. Finite number; minimum 0. |
| pondingHead | Ponding Head | Required. Finite number; minimum 0. |
| moistureDeficit | Positive volumetric water-content difference, no greater than one. | Required. Finite number; maximum 1; strictly above 0. |
| cumulativeInfiltration | Positive water-equivalent infiltration depth in the head length unit. | Required. Finite number; strictly above 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| capacityFactor | Dimensionless multiplier; hydraulic conductivity is not applied here. | Required. Finite number. |
| wettingFrontDepth | Wetting Front Depth | Required. Finite number. |
{
"input": {
"suctionHead": 0.2,
"pondingHead": 0.05,
"moistureDeficit": 0.4,
"cumulativeInfiltration": 0.1
},
"output": {
"capacityFactor": 2,
"wettingFrontDepth": 0.25
}
}Limitations and assumptions
- Heads and cumulative infiltration are lengths in one unit; deficit is a volumetric fraction. The factor needs conductivity separately and is not a solved Green-Ampt time history or field calibration.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use suitable field measurements, aquifer assumptions, and a complete groundwater analysis for resource or safety decisions.
References
Similar or alternative tools
- Soil Storage Deficit One Layer
Multiply nonnegative depth by targetWaterFraction-measuredWaterFraction, both in [0, 1], for signedDeficit and clip only positiveDeficit at zero.
- Seepage Velocity Porosity Factor
Divide signed darcyFlux by effectivePorosity in (0, 1] for seepageVelocity.