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Parshall Flume Free-Flow Discharge Calculator

Easily calculate and compute parshall flume free-flow discharge calculator with accurate equations, live formulas, and expert guidance.

Standard Parshall throat width.

Water level measured at 2/3 distance in converging section.

Calculated Result
5.62 cfs

Flow Rate (Q)

Flow Rate (Q)

5.62 cfs

Flow Rate Cubic Feet Per Sec

5.62

Flow Rate M3 Per Second

0.159

Flow Rate Us Gpm

2521

Submergence Free Flow Limit

Free-flow valid for submergence ratio Hb/Ha <= 0.60 (3"-9") or <= 0.70 (1-8 ft)

5.62 — cfs

Calculation Breakdown

  1. Applied FormulaEvaluates free-flow discharge through standard ASTM D1941 Parshall flumes used in wastewater treatment facilities, municipal sewers, and irrigation canals.Q = 4 W H_a^{1.522} \quad (\text{For 1-foot Standard Flume})

Parshall Flume Discharge Metric Output

Interactive visualization based on your current inputs

Calculated Value
0.01.42.84.25.6Flow Rate (Q)

What Is the Parshall Flume Free-Flow Discharge Calculator?

This tool computes parshall flume free-flow discharge calculator with high precision arithmetic.

How Does the Parshall Flume Free-Flow Discharge Calculator Work?

Evaluates free-flow discharge through standard ASTM D1941 Parshall flumes used in wastewater treatment facilities, municipal sewers, and irrigation canals.

Parshall Flume Free-Flow Discharge Calculator Formula & Variables

The core mathematical equation utilized by this calculator is expressed as:

Q=4WHa1.522(For 1-foot Standard Flume)Q = 4 W H_a^{1.522} \quad (\text{For 1-foot Standard Flume})

Evaluates free-flow discharge through standard ASTM D1941 Parshall flumes used in wastewater treatment facilities, municipal sewers, and irrigation canals.

How to Use the Parshall Flume Free-Flow Discharge Calculator

  1. Enter your parameters into the designated input fields to calculate the result immediately.

Step-by-Step Example Calculation

Parshall Flume Free-Flow Discharge Calculator Example

Input Values:

throatWidthInchesW:12
upstreamHeadFeetHa:1.25
Worked Steps: Sample evaluation based on standard reference conditions.

Understanding Your Result

The calculated primary figure indicates the optimal or required cfs.

Factors That Affect the Result

  • Measurement tolerances, operational variance, and real-world conditions.

When Should You Use This Calculator?

  • Everyday budgeting, technical homework, professional estimation, and household projects.

Assumptions & Limitations

  • Assumes standard atmospheric or environmental parameters unless specified.

Frequently Asked Questions

Calculation Accuracy & Reference Note

Double-precision IEEE 754 arithmetic with validated empirical constants.

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