Equation For Water Level Fluctuation Calculator

Equation For Water Level Fluctuation:

\[ h = \frac{RG - DG - B + Is + I}{A \times SY} \]

Gross Recharge due to Rainfall (RG):

m³/s

Gross Water Draft (DG):

m³/s

Base Flow into the Stream from the Area (B):

m³/s

Recharge of Ground Water Body (Is):

m³/s

Net Ground Water Flowing Outside Catchment (I):

m³/s

Watershed Area (A):

m²

Specific Yield (SY):

Water Level Fluctuation (h):

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1. What is the Equation For Water Level Fluctuation?

The Equation For Water Level Fluctuation calculates the irregular rising and falling in number or amount of water during monsoon season. It provides a quantitative assessment of water level changes based on various hydrological parameters.

2. How Does the Calculator Work?

The calculator uses the water level fluctuation equation:

\[ h = \frac{RG - DG - B + Is + I}{A \times SY} \]

Where:

\( h \) — Water Level Fluctuation (m)
\( RG \) — Gross Recharge due to Rainfall (m³/s)
\( DG \) — Gross Water Draft (m³/s)
\( B \) — Base Flow into the Stream from the Area (m³/s)
\( Is \) — Recharge of Ground Water Body (m³/s)
\( I \) — Net Ground Water Flowing Outside Catchment (m³/s)
\( A \) — Watershed Area (m²)
\( SY \) — Specific Yield (dimensionless)

Explanation: The equation accounts for the balance between water inputs and outputs in a watershed area, normalized by the area and specific yield.

3. Importance of Water Level Fluctuation Calculation

Details: Accurate water level fluctuation estimation is crucial for water resource management, flood prediction, groundwater assessment, and environmental monitoring in watershed areas.

4. Using the Calculator

Tips: Enter all parameters in their respective units. Watershed Area must be in square meters, flow rates in cubic meters per second, and Specific Yield as a dimensionless value. All values must be positive.

5. Frequently Asked Questions (FAQ)

Q1: What is Specific Yield?
A: Specific Yield refers to the volume of water that a saturated rock or soil will yield due to gravity drainage to the total volume of the rock or soil.

Q2: Why is Base Flow important in this calculation?
A: Base Flow represents the sustained flow that is not runoff, it is water from the ground, flowing into the channel over a long time and with a certain delay.

Q3: What are typical values for Specific Yield?
A: Specific Yield values typically range from 0.01 to 0.35 depending on the soil or rock type, with higher values for coarse-grained materials.

Q4: When is this equation most applicable?
A: This equation is particularly useful during monsoon season for assessing water level changes in watershed areas with well-defined boundaries.

Q5: What factors can affect the accuracy of this calculation?
A: Measurement accuracy of input parameters, temporal variations in flow rates, and heterogeneity in specific yield across the watershed can affect calculation accuracy.