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Calculate Weighted Curve Number For a Basin From the Curve Numbers and Areas of the Subbasins:
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*Referencing TR-55, Chapter 2, this calculation is to be used for calculating the weighted CN for a basin area from the CN values and areas of its subbasins. |
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Calculation: |
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Designer/Checker: |
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Input: |
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Subbasin 1 curve number (CN1) |
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Area of subbasin 1, or percent of overall basin (A1 - %, ac, ha, sq mi or sq km ) |
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Subbasin 2 curve number (CN2) |
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Area of subbasin 2, or percent of overall basin (A2 - %, ac, ha, sq mi or sq km ) |
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Subbasin 3 curve number (CN3) |
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Area of subbasin 3, or percent of overall basin (A3 - %, ac, ha, sq mi or sq km ) |
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Subbasin 4 curve number (CN4) |
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Area of subbasin 4, or percent of overall basin (A4 - %, ac, ha, sq mi or sq km ) |
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Subbasin 5 curve number (CN5) |
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Area of subbasin 5, or percent of overall basin (A5 - %, ac, ha, sq mi or sq km ) |
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Subbasin 6 curve number (CN6) |
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Area of subbasin 6, or percent of overall basin (A6 - %, ac, ha, sq mi or sq km ) |
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Output: |
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Total Product = |
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Total Area = |
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Weighted curve number, CNw = |
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