The Runoff Curve Number (CN) is a key concept in hydrology used to estimate direct runoff from rainfall events. It is part of the Soil Conservation Service (SCS) method, developed by the United States Department of Agriculture (USDA) Natural Resources Conservation Service (NRCS). ### Key Points About Runoff Curve Number: 1. **Definition**: The CN represents the potential for runoff from a rainfall event based on land use, soil type, and hydrological conditions.
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