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Dry Well Volume Formula:
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Dry well size calculation determines the appropriate volume for a dry well (also known as an infiltration basin) based on expected runoff volume. The calculation includes a safety factor to account for variations in rainfall intensity and soil absorption rates.
The calculator uses the dry well volume formula:
Where:
Explanation: The safety factor of 1.2 provides a 20% additional capacity to handle unexpected heavy rainfall or reduced infiltration rates.
Details: Proper dry well sizing is essential for effective stormwater management. An undersized dry well may lead to flooding, while an oversized one may be unnecessarily costly. Accurate calculation helps balance effectiveness and efficiency.
Tips: Enter the expected runoff volume in cubic meters. The value must be greater than zero. The calculator will automatically apply the safety factor and provide the recommended dry well volume.
Q1: What is a dry well?
A: A dry well is an underground structure that collects and allows stormwater to gradually infiltrate into the surrounding soil.
Q2: Why is a safety factor needed?
A: The safety factor accounts for variations in rainfall intensity, soil conditions, and potential partial clogging over time.
Q3: How do I calculate runoff volume?
A: Runoff volume is typically calculated based on catchment area, rainfall intensity, and runoff coefficient specific to your surface type.
Q4: Can this calculator be used for commercial projects?
A: While this provides a general estimate, commercial projects often require more detailed hydrological analysis and local regulations compliance.
Q5: What factors affect dry well performance?
A: Soil permeability, groundwater level, well design, and maintenance practices all significantly impact dry well performance.