Q1)A storm water retention pond following a 4-hour rainfall event with 2-in accumulation. The contributing watershed area is 20 acres, of which 2 acres in the pond. The pond has a rectangular geometry. The initial depth of water in the pond is 5 ft. The soil of the watershed on average is pasture type in good condition. The pond drains by infiltration through the bottom (fully effective) and sides of the pond at the rate of 2 in/hr. The effective area for infiltration through the sides of the pond is 2000 ft.. What is the depth of water in the pond 12 br after rainfall ends? Assume unoffhas ended by this time?

Q1)A storm water retention pond following a 4-hour rainfall event with 2-in accumulation. The contributing watershed area is 20 acres, of which 2 acres in the pond. The pond has a rectangular geometry. The initial depth of water in the pond is 5 ft. The soil of the watershed on average is pasture type in good condition. The pond drains by infiltration through the bottom (fully effective) and sides of the pond at the rate of 2 in/hr. The effective area for infiltration through the sides of the pond is 2000 ft.. What is the depth of water in the pond 12 br after rainfall ends? Assume unoffhas ended by this time?

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Storm Sewers and Detention

The storm drains system transports rainwater or stormwater and other runoff from roads, parking lots, and roof downpipes directly to nearby creeks, rivers, or the sea without any treatment.

Question

Q1)A storm water retention pond following a 4-hour rainfall event with 2-in
accumulation. The contributing watershed area is 20 acres, of which 2 acres in
the pond. The pond has a rectangular geometry. The initial depth of water in the
pond is 5 ft. The soil of the watershed on average is pasture type in good
condition. The pond drains by infiltration through the bottom (fully effective)
and sides of the pond at the rate of 2 in/hr. The effective area for infiltration
through the sides of the pond is 2000 ft. What is the depth of water in the pond
12 hr after rainfall ends? Assume runoff has ended by this time?

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