Depth At Which Reservoir Is Completely Filled Up Calculator

Formula Used:

\[ h_o = H - \frac{(V_s - V_o)}{A_o} \]

Difference in the Elevation (FRL and Original bed) (H):

Volume of Sediment to be Distributed (Vs):

m³

Volume of Sediment (Vo):

m³

Area at the New Zero Elevation (Ao):

m²

Height above Bed (ho):

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1. What is the Height Above Bed Calculation?

The Height Above Bed calculation determines the elevation from surface of zero elevation to which heights of various points are referenced in reservoir sediment distribution analysis. This is crucial for understanding how sediment fills reservoir capacity.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ h_o = H - \frac{(V_s - V_o)}{A_o} \]

Where:

\( h_o \) — Height above Bed (m)
\( H \) — Difference in Elevation (FRL and Original bed) (m)
\( V_s \) — Volume of Sediment to be Distributed (m³)
\( V_o \) — Volume of Sediment (m³)
\( A_o \) — Area at New Zero Elevation (m²)

Explanation: This formula calculates the height above the bed by accounting for the difference between sediment volumes distributed across the reservoir area relative to the elevation difference.

3. Importance of Reservoir Sediment Distribution

Details: Accurate sediment distribution calculation is essential for reservoir capacity management, flood control planning, and maintaining sustainable water storage capabilities over time.

4. Using the Calculator

Tips: Enter all values in appropriate units (meters for lengths, cubic meters for volumes, square meters for areas). Ensure all values are positive numbers with Area and Elevation Difference greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What does Full Reservoir Level (FRL) represent?
A: FRL is the maximum water level designed for normal reservoir operation under optimal conditions.

Q2: How is sediment volume typically measured?
A: Sediment volume is measured through bathymetric surveys, sediment sampling, and volumetric calculations based on elevation-area-capacity curves.

Q3: Why is new zero elevation important?
A: The new zero elevation provides a updated reference surface for vertical measurements after sediment deposition has occurred.

Q4: What factors affect sediment distribution in reservoirs?
A: Water flow patterns, sediment particle size, reservoir geometry, and operational practices all influence how sediment distributes within a reservoir.

Q5: How often should these calculations be performed?
A: Regular monitoring (typically annually or after major flood events) is recommended to maintain accurate reservoir capacity assessments.