Change In Storage Volumes Calculator

Formula Used:

\[ \Delta S_v = R_N - R_o + V_r - V_d - E_M - F_x \]

Natural Flow Volume (R_N):

m³/s

Observed Flow Volume (R_o):

m³/s

Volume of Return Flow (V_r):

m³/s

Volume Diverted Out of Stream (V_d):

m³/s

Net Evaporation Losses (E_M):

m³/s

Net Export of Water from Basin (F_x):

m³/s

Change in Storage Volumes (ΔS_v):

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1. What is Change in Storage Volumes?

Change in Storage Volumes of water storage bodies on the stream is the difference of water incoming and outgoing. It represents the net change in water storage within a basin over a specific period.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ \Delta S_v = R_N - R_o + V_r - V_d - E_M - F_x \]

Where:

\( R_N \) — Natural Flow Volume (m³/s)
\( R_o \) — Observed Flow Volume (m³/s)
\( V_r \) — Volume of Return Flow (m³/s)
\( V_d \) — Volume Diverted Out of Stream (m³/s)
\( E_M \) — Net Evaporation Losses (m³/s)
\( F_x \) — Net Export of Water from Basin (m³/s)

Explanation: The equation accounts for all major water balance components including natural flows, observed flows, return flows, diversions, evaporation losses, and water exports.

3. Importance of ΔS_v Calculation

Details: Accurate calculation of change in storage volumes is crucial for water resource management, drought monitoring, flood forecasting, and sustainable water allocation planning.

4. Using the Calculator

Tips: Enter all values in cubic meters per second (m³/s). Ensure all measurements are taken over the same time period for accurate results. Values should be positive numbers representing flow rates.

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between natural flow and observed flow?
A: Natural flow represents the undisturbed river flow, while observed flow is the actual measured flow that may be affected by human activities and infrastructure.

Q2: How is return flow volume measured?
A: Return flow is typically measured at discharge points from irrigation systems, wastewater treatment plants, and industrial facilities returning water to the stream.

Q3: What factors affect evaporation losses?
A: Evaporation losses depend on temperature, humidity, wind speed, water surface area, and reservoir characteristics.

Q4: Why is water export considered in the calculation?
A: Water exported from the basin represents water that is permanently removed from the local water system and must be accounted for in the storage balance.

Q5: What time period should be used for these measurements?
A: All measurements should cover the same time period (daily, monthly, or annually) to ensure consistency in the water balance calculation.