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Broad-Crested Weir Discharge & Modular Limit Calculator

Easily calculate and compute broad-crested weir discharge & modular limit calculator with accurate equations, live formulas, and expert guidance.

Transverse width of weir crest.

Water elevation above weir crest.

Empirical weir coefficient (typically 0.84 - 0.92).

Calculated Result
1.92 m³/s

Weir Discharge (Q)

Weir Discharge (Q)

1.92 m³/s

Weir Discharge Flow Rate Q

1.92

Flow Rate Liters Per Second

1921

Theoretical Critical Depth On Crest M

0.433

Modular Limit Threshold

Submergence ratio h_tail/H must remain < 0.67 to maintain modular free-flow discharge

1.92 — m³/s

Calculation Breakdown

  1. Applied FormulaSizes broad-crested weir volumetric flow rates and critical overflow control depths for open channel discharge monitoring stations.y_c = \frac{2}{3} H \quad (\text{Critical Depth Over Weir Crest})

Broad-Crested Weir Flow Metric Output

Interactive visualization based on your current inputs

Calculated Value
0.00.51.01.41.9Weir Discharge (Q)

What Is the Broad-Crested Weir Discharge & Modular Limit Calculator?

This tool computes broad-crested weir discharge & modular limit calculator with high precision arithmetic.

How Does the Broad-Crested Weir Discharge & Modular Limit Calculator Work?

Sizes broad-crested weir volumetric flow rates and critical overflow control depths for open channel discharge monitoring stations.

Broad-Crested Weir Discharge & Modular Limit Calculator Formula & Variables

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

yc=23H(Critical Depth Over Weir Crest)y_c = \frac{2}{3} H \quad (\text{Critical Depth Over Weir Crest})

Sizes broad-crested weir volumetric flow rates and critical overflow control depths for open channel discharge monitoring stations.

How to Use the Broad-Crested Weir Discharge & Modular Limit Calculator

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

Step-by-Step Example Calculation

Broad-Crested Weir Discharge & Modular Limit Calculator Example

Input Values:

weirCrestWidthBMeters:2.5
upstreamHeadAboveCrestHMeters:0.65
dischargeCoefficientCd:0.86
Worked Steps: Sample evaluation based on standard reference conditions.

Understanding Your Result

The calculated primary figure indicates the optimal or required m³/s.

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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