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Calculate discharge over a rectangular sharp-crested weir

Calculate discharge over a rectangular sharp-crested weir.

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Quick Answer

The calculate discharge over a rectangular sharp-crested weir computes q_weir from the input values you provide.

Calculator

q_weir (m³⁄s)
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Result Interpretation

Calculate discharge over a rectangular sharp-crested weir computes q_weir in m^3/s using the defined engineering formula and the input values provided. q_weir is expressed in m^3/s. No universal acceptance threshold is defined by this calculator.

Worked Example

default_test

Given:

  • c_w = 1.84
  • b_weir = 1
  • h_head = 0.3

Expected Result:

  • q_weir = 0.30234285174285

Engineering Interpretation:

Under the given input conditions, the calculated result is: q_weir = 0.30234285174285 m^3/s.

The actual numerical result is computed by the Runtime engine using the persisted tool definition. The values shown here come from deterministically validated test cases.

Formula / Method

q_weir = c_w * b_weir * pow(h_head, 1.5)

q_weir.

Variables

SymbolLabelRoleDescription
c_w c_w INPUT c_w
b_weir b_weir INPUT b_weir
h_head h_head INPUT h_head
q_weir q_weir OUTPUT q_weir

Calculation Steps

  1. Enter the c_w in 1.
  2. Enter the b_weir in m.
  3. Enter the h_head in m.
  4. Read the q_weir (m^3/s) from the results.

Frequently Asked Questions

What does this calculator calculate?

The Calculate discharge over a rectangular sharp-crested weir estimates q_weir based on the input parameters you provide

Why is b_weir important in this calculation?

b_weir is directly proportional to q_weir. When you enter b_weir in m, the calculator uses it in the engineering formula to compute the output

How should I interpret the result q_weir?

The calculator outputs q_weir in m^3/s. To convert to liters per second, multiply by 1000. For liters per minute, multiply by 60000. The result is computed directly from the input values using the defined engineering formula

What units should I use for the inputs?

Enter each value in the units shown next to the input field: b_weir (m), h_head (m). Make sure all inputs use the specified units for consistent results

What assumptions does this calculator use?

This calculator uses automatically validated engineering formulas. Results are approximate and should be validated against site-specific conditions, applicable codes, and professional engineering judgment

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