13.5.2. Sherman’s Equation (USA Standard)

Try these first

1. 1.

   What does the variable D represent in Sherman's Equation?

   Hint

   Think about how long the rain is falling.

2. 2.

   Name one application of Sherman's Equation.

   Hint

   Where do we need to manage water flow?

3. 3.

   What does Sherman's Equation estimate?

   • Soil erosion rates
   • Rainfall intensity
   • Groundwater levels

   Hint

   Think about the main focus of the equation.

4. 4.

   True or False: The constants A, B, and C are the same across all geographical areas.

   • True
   • False

   Hint

   Consider why data from different regions might not be directly comparable.

5. 5.

   Given historical rainfall data provides A=350, B=10, C=1.5, calculate the expected rainfall intensity for D=30 minutes.

   Hint

   Apply the formula correctly, focusing on simplifications first.

6. 6.

   Discuss the implications of using incorrect values for constants in urban drainage system designs.

   Hint

   What are the risks of miscalculating expected rainfall patterns?