9.2. Uses

Try these first

1. 1.

   Define runoff.

   Hint

   Think about what happens to rainwater after it hits the ground.

2. 2.

   What does the SCS Curve Number range between?

   Hint

   Consider the extremes of infiltration and runoff.

3. 3.

   What is runoff?

   • Water that seeps into the ground
   • Water that flows into water bodies after rainfall
   • Water vapor released from trees

   Hint

   Think about where rainwater goes after landing on the ground.

4. 4.

   True or False: The SCS Curve Number is only influenced by rainfall intensity.

   • True
   • False

   Hint

   Remember the multiple factors that influence runoff.

5. 5.

   Given a watershed with a Curve Number of 85, precipitation of 50 mm, and an initial abstraction of 10 mm, calculate the runoff using the SCS method.

   Hint

   Remember to break the formula down step by step and calculate S first.

6. 6.

   Analyze the effect of a steep slope versus a gentle slope on runoff behavior and hydrograph shape.

   Hint

   Think about how the landscape influences the speed at which water travels.