Description
Convert a signed snow-depth change to a supplied-density water-equivalent change.
Weather accumulation records need explicit reset, carry, observation-time and area-weight conventions. Trace or missing precipitation differs from measured zero, and radar dBZ must be converted to a linear basis before a linear reflectivity mean. Supplied density, timing and weighting terms do not create a forecast or verify actual weather conditions.
Convert a signed snow-depth change to a supplied-density water-equivalent change.
When to use this tool
Use Snow Water Equivalent Increment when you already have signedSnowDepthChange, suppliedSnowDensity, suppliedWaterDensity and need to convert a signed snow-depth change to a supplied-density water-equivalent change.
How to use the tool and how it works
- Enter signedSnowDepthChange, suppliedSnowDensity, suppliedWaterDensity. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read signedWaterEquivalentChange. Use the output convention below.
Require snow density>=0 and water density>0; multiply signed depth change by snowDensity/waterDensity.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| signedSnowDepthChange | Signed Snow Depth Change | Required. Finite number. |
| suppliedSnowDensity | Nonnegative density in the same density unit as suppliedWaterDensity; no density model is fitted. | Required. Finite number; minimum 0. |
| suppliedWaterDensity | Supplied Water Density | Required. Finite number; strictly above 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| signedWaterEquivalentChange | Signed Water Equivalent Change | Required. Finite number. |
{
"input": {
"signedSnowDepthChange": 0.2,
"suppliedSnowDensity": 100,
"suppliedWaterDensity": 1000
},
"output": {
"signedWaterEquivalentChange": 0.020000000000000004
}
}Limitations and assumptions
- Densities must use compatible units; assumes uniform supplied density and does not measure snow water, melt dynamics or precipitation phase.
- 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
Review the original gauge/radar series, clock and accumulation metadata, including resets and missing intervals. Use the complete spatial or process model for basin precipitation, snow or forecasting; local depth contributions and reference gaps do not infer unobserved weather.
References
Similar or alternative tools
- Snow Pack Melt Volume Balance
Calculate a signed snowpack water-volume balance.
- Freezing Level Station Height Gap
Measure a supplied freezing level's height relative to a station.