Flow Discharge Rate Channel Width Calculator
Rectangular mean-section discharge of observed volcanic flow; no rheology or hazard forecast.
Description
Flow Discharge Rate Channel Width Calculator: return discharge m3 per s.
A rectangular-channel discharge estimate multiplies flow area by mean velocity. Width, depth and velocity must describe the same cross-section.
This tool returns discharge m3 per s. Use the stated units and model convention when interpreting these fields.
When to use this tool
Use this tool when the supplied inputs match the specific operation described above and you need a repeatable result under its stated convention.
- Check the supported input and output contract against an existing calculation or observation.
- Use the complete example to confirm units, selector spelling and result interpretation.
How to use the tool and how it works
- Enter every field in the input table using the stated units and the exact supported selector spelling where applicable.
- Run the tool. Correct input errors before interpreting an output.
- Read the result fields below; use accompanying flags and the stated sign, boundary or model convention when interpreting a number.
Multiply positive channelWidthM and meanDepthM by nonnegative meanVelocityMPerS.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| channelWidthM | Channel width m. Meters. | Finite number; greater than zero |
| meanDepthM | Mean depth m. Meters. | Finite number; greater than zero |
| meanVelocityMPerS | Mean velocity m per s. Meters per second. | Finite number; zero or greater |
| Output field | Interpretation |
|---|---|
| result | Object containing the following named result fields. |
| result.dischargeM3PerS | Discharge m3 per s; use the stated units and sign convention. |
{
"input": {
"channelWidthM": 2,
"meanDepthM": 3,
"meanVelocityMPerS": 4
},
"output": {
"result": {
"dischargeM3PerS": 24
}
}
}Limitations and assumptions
- The calculation assumes a rectangular section and a representative mean velocity; it does not solve an evolving lava flow.
- Every declared field is required and unexpected fields are rejected. Numeric inputs must be finite; input errors are distinct from a valid false result or an explicitly qualified output.
- Extremely large inputs and nonfinite or excessively large outputs are rejected. List positions reported by the tool use zero-based indices unless stated otherwise.
Alternative or Complementary methods
Check the underlying observations, units and conventions independently before using the result in a larger workflow. The tools listed below address nearby tasks; compare their inputs and scope before substituting one for this operation.
References
Similar or alternative tools
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