Watershed Lake Area Drainage Ratio Calculator
Actualexternaldelineatedtributarywatershed/lakearea drainageratio,sameunits/not infernutrientload or delineategeodesy. Actual independent model/unit/frame/epoch/calibration and applicable measurement established;not precise ephemeris,forecast,geodesy operation,identity or safety approval.
Description
Drainage ratio compares an independently delineated tributary watershed with the lake's measured area.
Drainage ratio compares an independently delineated tributary watershed with the lake's measured area.1
Boundary definitions matter because including different catchment land changes the ratio.
When to use Watershed Lake Area Drainage Ratio Calculator
Use this tool to apply the stated watershed lake area drainage ratio calculator operation with an explicit input and unit basis.
How to use Watershed Lake Area Drainage Ratio Calculator and how it works
- Establish the measurement basis and units described above.
- Enter actualIndependentlyDelineatedWatershedArea, actualMeasuredLakeArea and run the tool.
- Read result.value using the output meanings below.
- If input is rejected, correct the stated type, range, ordering or alignment issue and rerun; review successful results under the declared convention.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| actualIndependentlyDelineatedWatershedArea | Independently delineated watershed area, on the basis specified in the algorithm. | number | required; finite; nonnegative; further conditions in the algorithm |
| actualMeasuredLakeArea | Measured lake area, on the basis specified in the algorithm. | number | required; finite; strictly positive; further conditions in the algorithm |
Require nonnegative watershed area and positive lake area in matching square units. Divide watershed by lake area.
drainage ratio = watershed area / lake area Apply the declared units, ordering and branch conditions.
| Output field | Meaning | Value type |
|---|---|---|
| result | Object containing the declared output fields. | object |
| result.value | Dimensionless watershed/lake-area ratio. | number |
{
"input": {
"actualIndependentlyDelineatedWatershedArea": 10,
"actualMeasuredLakeArea": 2
},
"output": {
"result": {
"value": 5
}
}
}Limitations and assumptions
The output applies the declared operation to the values you supply. Establish the measurement basis, units, coefficients and any caller-selected rules before interpreting it. The tool does not independently collect or verify observations or decide whether a model or reference applies.
Supply explicit required fields with the documented types and dense aligned arrays. Unknown fields, wrong types and nonfinite numbers are rejected. Branch-specific constraints are explained above. A successful false boolean, negative signed difference, empty slice or unresolved tie is distinct from an input error. Very large inputs or outputs may be rejected by shared resource limits.
Alternative or Complementary methods
For a related operation, use Water Balance Precipitation Evaporation Calculator. Direct precipitation and evaporation contribute signed water-volume change across a lake surface.
For a related operation, use Inflow Outflow Storage Residual Checker. A storage ledger residual compares observed lake storage change with recorded inflow minus outflow.
References
Similar or alternative tools
- Water Balance Precipitation Evaporation Calculator
Direct precipitation and evaporation contribute signed water-volume change across a lake surface.
- Inflow Outflow Storage Residual Checker
A storage ledger residual compares observed lake storage change with recorded inflow minus outflow.