Description
Multiply depthMm by areaKm2, coveredFraction in [0, 1], and 1000 for volumeM3.
Precipitation and evaporation records distinguish water depth, catchment area, volume, and observation duration. Converting among them requires coherent units and a clear measured or modeled basis.
Multiply depthMm by areaKm2, coveredFraction in [0, 1], and 1000 for volumeM3.
When to use this tool
Use Storm Hyetograph One Bin Volume Term when you need one explicit water-depth, volume, or accumulation component.
How to use the tool and how it works
- Enter depthMm, areaKm2, coveredFraction, durationMinutes. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read volumeM3, meanFlowM3PerSecond. Use the output convention below.
Multiply depthMm by areaKm2, coveredFraction in [0, 1], and 1000 for volumeM3. Divide by 60 times positive durationMinutes for meanFlowM3PerSecond.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| depthMm | Nonnegative interval precipitation depth in millimeters. | Required. Finite number; minimum 0. |
| areaKm2 | Nonnegative contributing area in square kilometers. | Required. Finite number; minimum 0. |
| coveredFraction | Covered Fraction | Required. Finite number; minimum 0; maximum 1. |
| durationMinutes | Positive interval duration in minutes. | Required. Finite number; strictly above 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| volumeM3 | Precipitation volume in cubic meters after the supplied covered fraction. | Required. Finite number. |
| meanFlowM3PerSecond | Interval volume divided by duration in seconds; not peak runoff. | Required. Finite number. |
{
"input": {
"depthMm": 10,
"areaKm2": 2,
"coveredFraction": 0.5,
"durationMinutes": 30
},
"output": {
"volumeM3": 10000,
"meanFlowM3PerSecond": 5.555555555555555
}
}Limitations and assumptions
- Depth and area are nonnegative; this is rainfall-volume accounting for one interval, not routed runoff, peak discharge, or a flood forecast.
- 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
Check instrument records, unit conversions, temporal coverage, and a complete hydrologic model before interpreting runoff or water availability.
References
Similar or alternative tools
- Rainfall Intensity Duration Depth Factor
Multiply nonnegative intensityMmPerHour by durationMinutes/60 for depthMm and by runoffFraction in [0, 1] for effectiveDepthMm.
- Catchment Precipitation Area Term
Multiply nonnegative depth by nonnegative area for volume.