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Formula Used:
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Possible Recharge refers to the gross recharge minus the natural recharge of the area in silty alluvial formations, which is crucial for sustainable groundwater management and resource planning.
The calculator uses the formula:
Where:
Explanation: The formula calculates potential groundwater recharge by considering seasonal water level changes, watershed characteristics, and existing water extraction rates.
Details: Accurate recharge estimation is essential for sustainable water resource management, determining safe yield limits, and planning groundwater development projects in alluvial aquifers.
Tips: Enter water level fluctuation in meters, watershed area in square meters, and gross water draft in cubic meters per second. All values must be positive numbers.
Q1: What is water level fluctuation in this context?
A: It refers to the irregular rising and falling in the number or amount of water during monsoon season in the aquifer.
Q2: How is watershed area defined?
A: The watershed area refers to the isolated area with a well-demarcated boundary line, draining the rainwater to a single outlet.
Q3: What does gross water draft represent?
A: Gross water draft refers to the total volume of water extracted or utilized from a catchment area.
Q4: Why is the factor 12 used in the formula?
A: The factor 12 is used to convert the recharge calculation to appropriate time units (typically annual basis) based on the input parameters.
Q5: What are typical values for possible recharge in silty alluvial areas?
A: Values vary significantly based on local hydrogeological conditions, but typically range from moderate to high due to the good permeability characteristics of silty alluvial formations.