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Total Storm Precipitation represents the total amount of precipitation during a storm event, calculated using the W-Index, duration of rainfall excess, total storm runoff, and depression/interception losses.
The calculator uses the formula:
Where:
Explanation: This formula combines the infiltration component (W-Index multiplied by duration) with surface runoff and losses to determine the total precipitation during a storm event.
Details: Accurate calculation of total storm precipitation is crucial for hydrological modeling, flood prediction, water resource management, and infrastructure design in civil engineering projects.
Tips: Enter W-Index in cm, duration in hours, total storm runoff in cm, and depression/interception losses in cm. All values must be valid positive numbers.
Q1: What is W-Index in hydrology?
A: W-Index is the average infiltration rate during the time when the rainfall intensity exceeds the infiltration rate, representing the soil's ability to absorb water during intense rainfall.
Q2: How is duration of rainfall excess determined?
A: Duration of rainfall excess is the total time during which rainfall intensity is greater than the average infiltration rate, typically measured through rainfall intensity data analysis.
Q3: What factors affect depression and interception losses?
A: These losses are influenced by vegetation cover, surface roughness, land use, and meteorological conditions such as temperature and humidity.
Q4: How does this calculation differ from simple rainfall measurement?
A: This approach accounts for hydrological processes including infiltration, runoff, and losses, providing a more comprehensive understanding of water distribution during storm events.
Q5: What are typical applications of this calculation?
A: This calculation is used in watershed management, flood control design, urban drainage planning, and environmental impact assessments of stormwater systems.