Weighted Curve Number Calculator for a Basin
Calculate the overall curve number of a basin by weighing the curve numbers of subbasins by their areas:
\[
CN_{weighted} = \frac{\sum (CN_i \times \text{Area}_i)}{\sum \text{Area}_i}
\]
* Enter the area (in consistent units) and curve number for each subbasin.
Step 1: Enter Subbasin Data
Example: 10 (units: km² or any consistent unit)
Example: 75
Example: 20 (same units as above)
Example: 80
Example: 15 (same units as above)
Example: 65
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