Partial Discharge In Sub-Area Between Two Verticals Given Flow Velocity Calculator

Formula Used:

\[ \Delta Q_i = \frac{(y_i + y_{i+1})}{2} \times W \times V_f \]

Depth 'yi' of Flow in Sub-Area:

Depth 'i+1' of Flow in Sub-Area:

Width between Two Verticals:

Flow Velocity:

m/s

Partial Discharges:

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1. What is Partial Discharge Calculation?

Partial discharge calculation is used in hydrometry to determine the flow rate in sub-areas between two verticals. This method is particularly useful in the moving-boat technique for velocity measurement in open channels.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ \Delta Q_i = \frac{(y_i + y_{i+1})}{2} \times W \times V_f \]

Where:

\( \Delta Q_i \) — Partial discharges of the flow in the sub-area (m³/s)
\( y_i \) — Depth of flow in sub-area at vertical i (m)
\( y_{i+1} \) — Depth of flow in sub-area at vertical i+1 (m)
\( W \) — Width between two verticals (m)
\( V_f \) — Flow velocity (m/s)

Explanation: The formula calculates the discharge in a sub-area by multiplying the average depth between two verticals by the width and flow velocity.

3. Importance of Partial Discharge Measurement

Details: Accurate partial discharge measurements are crucial for determining total flow rates in rivers and channels, water resource management, flood forecasting, and environmental monitoring.

4. Using the Calculator

Tips: Enter all depth measurements in meters, width in meters, and flow velocity in meters per second. Ensure all values are positive and physically meaningful.

5. Frequently Asked Questions (FAQ)

Q1: What is the moving-boat method?
A: The moving-boat method is a technique for measuring flow velocity in rivers where measurements are taken from a moving boat at predetermined verticals.

Q2: How accurate is this calculation method?
A: The accuracy depends on the precision of depth and velocity measurements. When properly executed, it can provide reliable discharge estimates.

Q3: When should this method be used?
A: This method is particularly useful in large rivers and channels where traditional wading measurements are not feasible.

Q4: Are there limitations to this method?
A: The method assumes uniform flow conditions between verticals and may be less accurate in rapidly changing flow conditions or complex channel geometries.

Q5: How many verticals are typically used?
A: The number of verticals depends on channel width and complexity, typically ranging from 20-30 for standard measurements.