Ask Question
17 February, 03:50

A detention pond is required to hold 0.7 ac-ft. The bottom of the pond is a square with dimension of 30' x 30'. If two opposing sides are vertical, and the other two sides are 1:1 (H:V), find the minimum required detention depth. Ignore the freeboard.

+4
Answers (1)
  1. 17 February, 06:56
    0
    minimum required detention depth is 20.233 ft

    Explanation:

    given data

    volume = 0.7 ac-ft = 0.7 * 43560 ft = 30492 ft³

    dimension = 30' x 30'

    two sides = 1:1 (H:V)

    solution

    we get here area of square = 30 * 30

    area = 900 ft²

    we consider height is y

    so volume will be triangular volume

    v2 = 2 * { 0.5 * y² * 30 }

    v2 = 30y²

    and volume = area * height

    v1 = 900 y

    so total volume v1 + v2

    total volume = 900 y + 30y²

    30492 = 900 y + 30y²

    y = 20.233 ft

    so minimum required detention depth is 20.233 ft
Know the Answer?
Not Sure About the Answer?
Find an answer to your question ✅ “A detention pond is required to hold 0.7 ac-ft. The bottom of the pond is a square with dimension of 30' x 30'. If two opposing sides are ...” in 📘 Engineering if you're in doubt about the correctness of the answers or there's no answer, then try to use the smart search and find answers to the similar questions.
Search for Other Answers