Van Den Burgh K Intrusion Parameter Calculator
Infer local Van den Burgh dD/dx=−Ku convention withx upstream and positive seaward residual speed, signed K retained; no intrusion-length law invented. Caller independently establishes units, regime, calibration and applicability; this does not establish design-code compliance, authenticity, operational safety, treatment efficacy or a validated forecast.
Description
The Van den Burgh relation links an axial dispersion gradient to residual flow under a stated coordinate convention.
The Van den Burgh relation links an axial dispersion gradient to residual flow under a stated coordinate convention.1
This tool infers a signed local coefficient with distance directed upstream and residual speed positive seaward.
When to use Van Den Burgh K Intrusion Parameter Calculator
Use this tool to calculate or review the supplied observations under the stated rules. Match the observation interval, units, datum, coordinate signs and model regime.
How to use Van Den Burgh K Intrusion Parameter Calculator and understand its results
- Match the observation interval, units, datum, coordinate signs and model regime.
- Enter observedDispersionGradientMSecond, callerMeanFreshwaterVelocityMSecond, using the field meanings and rules below, then run the tool.
- Read signedVanDenBurghK. Inspect nested result fields where present, and review unknown records separately from known matches.
- Correct any reported input issue and run again. Before using a successful result, check the stated units, signs, reference scope and observation coverage.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| observedDispersionGradientMSecond | Observed dispersion gradient m second | number | Required |
| callerMeanFreshwaterVelocityMSecond | Caller mean freshwater velocity m second | number | Required |
Require positive seaward residual speed and a finite signed dispersion gradient. Return the negative gradient divided by speed; negative results are retained.
K=−(dD/dx)/u Use the matching field units and the exact boundary, ordering and reference rules above.
| Output field | Meaning | Value type |
|---|---|---|
| signedVanDenBurghK | Signed van den burgh k; preserve the subtraction order and sign defined in the mechanics | number |
{
"input": {
"observedDispersionGradientMSecond": 2,
"callerMeanFreshwaterVelocityMSecond": 4
},
"output": {
"signedVanDenBurghK": -0.5
}
}Limitations and assumptions
The stated observation or model covers only the supplied record and reference regime. It does not fill missing measurements, supply uncertainty estimates or produce a validated forecast.
Missing required fields, unknown fields, wrong types and violated rules return input issues. Numeric values and outputs must be finite.
Alternative or Complementary methods
For a related step, use Estuarine Circulation Ratio UE Calculator: An estuarine circulation ratio compares surface flow with residual flow over a matched section. For a complementary comparison, use Hansen Rattray Mixing Classifier: Hansen–Rattray coordinates describe estuarine circulation and stratification within a particular reference chart.
References
Similar or alternative tools
- Estuarine Circulation Ratio UE Calculator
An estuarine circulation ratio compares surface flow with residual flow over a matched section.
- Hansen Rattray Mixing Classifier
Hansen–Rattray coordinates describe estuarine circulation and stratification within a particular reference chart.