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Hydraulic Design

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by

Dacy Thomas

on 7 May 2015

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Transcript of Hydraulic Design

How does the study area operate?
Is the current study area working well?
How might the area be altered?
What differences should changes cause?
AT WHITAKER FIELDS

How should the study area be changed?
SIX ELEMENTS
OF DESIGN
Is the current study area working well?
How might the area be altered?
What differences would changes cause?
How should the study area be changed?

How should the study area be described?
How does the study area operate?
How should the study area be described?
Emily Poston
Valerie Sorge
Dacy Thomas
Lindsay Wandall
CE 365K Design Project
DETENTION POND
Whitaker Fields
The Study Area:
Suggested by Dr. Maidment
Increase in impervious cover
Reduce peak runoff
Multipurpose fields & tennis courts
Total area:
65 acres
Pre-development:
15.6 %
impervious
Post-development:
31.2%
impervious
Pre-development
CN 78
Post-development
CN 81
Tc =
1.6
hours
Runoff flows directly into Waller Creek
Threat of erosion and pollution
Options: Bioretention, retention, swales
Detention pond: Cheapest and most reliable
Size of detention pond
Runoff
1.6 hours
Curve Number
CN pre-development: 78
CN post-development: 81
Impervious Area
Pre-Development: 15.6%
Post-Development: 31.2%
Time of Concentration
Unit Hydrograph
Peak Flow
100 year, 24 hour storm
Peak flow = qp * Pe
Pre-development: 28 cfs
Post-development: 30 cfs
Peak outflow/Peak inflow =
0.94
Type ll: Vs/Vr =
0.18
Storage Vol. = 0.18*Runoff Vol. =
9520 m^3
Design goal: Qp after = Qp before
Pondpack: Design outlet structure
Full transcript