11.5. First-flushing

Try these first

1. 1.

   What is the purpose of a first-flush device?

   Hint

   Think about what happens when it first rains.

2. 2.

   Name one pollutant that might be found in the first-flush.

   Hint

   No hint provided

3. 3.

   What does a first-flush device do?

   • Collects all rainwater
   • Diverts the initial runoff
   • Cleans rainwater

   Hint

   Think about the purpose of filtering contaminants.

4. 4.

   True or False: The first rainwater collected after a storm is clean.

   • True
   • False

   Hint

   What do you think happens during the first rainfall.

5. 5.

   Design a first-flush device for a small community with varying rainfall patterns. Discuss the components you would include and how each contributes to water quality.

   Hint

   Think about how the community’s environment affects rainfall characteristics.

6. 6.

   Analyze the impact of pollutants found in the first runoff on different applications of rainwater, such as irrigation vs drinking.

   Hint

   Consider the toxicity levels of pollutants in both applications.