Practice Scs Curve Number Scs Cn Method (2) - Runoff and Surface Water Hydrology

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9 questions

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6 sample questions

Question 1.
What does SCS stand for?
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Think of the agency responsible for the method.
Question 2.
Is higher Curve Number associated with more or less runoff?
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Consider what the number represents regarding infiltration.
3Question 3.
What is the range of Curve Numbers?
- 0-100
- 30-100
- 50-90
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Remember that higher numbers indicate less infiltration.
4Question 4.
True or False: Initial Abstraction is always equal to 0.2 times S.
- True
- False
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Think about how you're estimating runoff and its components.
Question 5.
You have a watershed with a Curve Number of 75 and a rainfall event of 80 mm. Calculate the expected runoff if the initial abstraction is 0.2S. Make assumptions for S.
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Use the curve number to find S.
Question 6.
If an area changes from agricultural to urban use, how would that affect the Curve Number and runoff potential? Discuss the implications.
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Consider permeability of surfaces.

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