Scenario: A new commercial development is planned in a 100-acre area with 85% imperviousness. To mitigate increased runoff, a detention basin is required. Design a basin to ensure the post-development 10-year, 24-hour storm peak discharge does not exceed the pre-development condition.
Scenario: A new commercial development is planned in a 100-acre area with 85% imperviousness. To mitigate increased runoff, a detention basin is required. Design a basin to ensure the post-development 10-year, 24-hour storm peak discharge does not exceed the pre-development condition.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Designing a detention Basin
Transcribed Image Text:**Scenario:** A new commercial development is planned in a 100-acre area with 85% imperviousness. To mitigate increased runoff, a detention basin is required. Design a basin to ensure the post-development 10-year, 24-hour storm peak discharge does not exceed the pre-development condition.
**Explanation:**
This text is about a planning scenario for a new commercial development. The development is planned on a 100-acre land area, where 85% of the surface is impervious. Impervious surfaces, like pavements and rooftops, do not allow water to infiltrate into the ground, leading to increased surface runoff.
To manage this runoff and prevent potential flooding, the scenario outlines a requirement to design a detention basin. A detention basin is a structure designed to hold excess runoff temporarily and release it slowly, ensuring that the rate of stormwater runoff post-development does not exceed the pre-development rate.
This particular requirement is geared towards managing runoff from a hypothetical storm that has a probability of occurring once every 10 years, lasting for 24 hours. The goal is to design the detention basin such that the peak discharge levels from this event after the development do not surpass those before the development.
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