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The Possible Recharge formula estimates the potential water recharge in hard rock areas with weathered jointed basalt formations. It calculates the maximum specific yield by considering water level fluctuations, watershed area, and gross water draft.
The calculator uses the formula:
Where:
Explanation: The formula accounts for the relationship between water level fluctuations during monsoon season, the total watershed area, and the amount of water extracted from the catchment area.
Details: Accurate recharge estimation is crucial for water resource management in hard rock areas, helping to determine sustainable water extraction limits and groundwater potential in weathered jointed basalt formations.
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 valid positive numbers.
Q1: What does Possible Recharge represent?
A: Possible Recharge refers to the gross recharge minus the natural recharge of the area, indicating the maximum potential water that can be stored in weathered jointed basalt formations.
Q2: Why is the factor 3 used in the formula?
A: The factor 3 accounts for the specific yield characteristics and hydrological properties of weathered jointed basalt in hard rock areas.
Q3: When should water level fluctuation be measured?
A: Water level fluctuation should be measured during monsoon season when irregular rising and falling of water levels occurs most significantly.
Q4: What is watershed area in this context?
A: Watershed area refers to the isolated area with a well demarcated boundary line that drains rainwater to a single outlet in the basalt formation.
Q5: Are there limitations to this calculation?
A: This calculation is specific to hard rock areas with weathered jointed basalt and may not be accurate for other geological formations or extreme hydrological conditions.