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The formula estimates runoff in hills and plains with little cultivation and average or varying rainfall conditions. It provides a simplified approach to calculate runoff based on rainfall measurements.
The calculator uses the formula:
Where:
Explanation: The formula applies a coefficient of 0.35 to the rainfall measurement to estimate the runoff amount, which is appropriate for hills and plains with minimal cultivation.
Details: Accurate runoff estimation is crucial for water resource management, flood prediction, agricultural planning, and environmental impact assessments in hilly and plain areas with limited cultivation.
Tips: Enter rainfall measurement in centimeters. The value must be valid (greater than 0). The calculator will compute the corresponding runoff value.
Q1: Why use a coefficient of 0.35?
A: The 0.35 coefficient is derived from empirical studies and is appropriate for hills and plains with little cultivation and average or varying rainfall conditions.
Q2: What are typical runoff values?
A: Runoff values vary significantly based on rainfall intensity, soil type, and land cover. This formula provides a general estimate for the specified conditions.
Q3: When should rainfall be measured?
A: Rainfall should be measured using standard rain gauges, typically as annual cumulative measurements for this calculation.
Q4: Are there limitations to this formula?
A: This formula is specific to hills and plains with little cultivation. It may not be accurate for areas with different land use patterns, soil types, or extreme rainfall conditions.
Q5: Can this formula be used for urban areas?
A: No, this formula is specifically designed for hills and plains with minimal cultivation. Urban areas typically have higher runoff coefficients due to impervious surfaces.