a.8 mins b.18mins c.12mins d.16mins Given a 25-year storm event using the rational method for the drainage basin located inPennsylvania (Region 1)Time of concentration detailsArea: A=24 acresOverland: Average grass cover: Length =100ft; slope =2.0 %Shallow Concentrated Flow: Length= 750 ft; slope =4.0 %, unpavedStream Flow (See Fig Below): Length=1000 ft; slope=0.4%Use design values from table 11.1 onlyImpervious =0.5 acresWooded (fair) = 11.5 acresGrass (fair) = 12 acresAverage cross sectionCalculate the time for Overland Flow (t1) Grass (fair) = 12 acresAverage cross sectionCalculate the time for Overland Flow (t1)4'20'▼12₁n = 0.035

Given, For overland flow, L = 100 ft and S = 2% or 0.02

Answered: Given a 25-year storm event using the…

Given a 25-year storm event using the rational method for the drainage basin located in Pennsylvania (Region 1) Time of concentration details Area: A=24 acres

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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Pressurized pipe flow

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Question

a.8 mins b.18mins c.12mins d.16mins

Given a 25-year storm event using the rational method for the drainage basin located in
Pennsylvania (Region 1)
Time of concentration details
Area: A=24 acres
Overland: Average grass cover: Length =100ft; slope =2.0 %
Shallow Concentrated Flow: Length= 750 ft; slope =4.0 %, unpaved
Stream Flow (See Fig Below): Length=1000 ft; slope=0.4%
Use design values from table 11.1 only
Impervious =0.5 acres
Wooded (fair) = 11.5 acres
Grass (fair) = 12 acres
Average cross section
Calculate the time for Overland Flow (t1)

Grass (fair) = 12 acres
Average cross section
Calculate the time for Overland Flow (t1)
4'
20'
▼
12₁
n = 0.035

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