A 100-acre watershed that is 80% Industrial and 20% newly graded areas (no vegetation). Thewatershed has soil group B. Determine the runoff volume for 10-year, 24-hr rainfall event (usethe IDF below)RAINFALL INTENSITY IN INCHES PER HOUR20.015.010.08.06.04.00.8X0.20.10.080.060.040.02IIப____lud6VDOT B, D & E eqn.except for 1-year10NOAA Atlas 14Vienna/Tysonsfor 1-year15 20MINUTES30RETURN40 50 60EN PERIOD (YEARS)2510DURATIONNOAA Atlas 14Vienna/Tysons234 5 6HOURS8 10 1218 24-

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A 100-acre watershed that is 80% Industrial and 20% newly graded areas (no vegetation). The watershed has soil group B. Determine the runoff volume for 10-year, 24-hr rainfall event (use the IDF below)

A 100-acre watershed that is 80% Industrial and 20% newly graded areas (no vegetation). The watershed has soil group B. Determine the runoff volume for 10-year, 24-hr rainfall event (use the IDF below)

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter16: Highway Drainage

Section: Chapter Questions

Problem 11P

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Question

A 100-acre watershed that is 80% Industrial and 20% newly graded areas (no vegetation). The
watershed has soil group B. Determine the runoff volume for 10-year, 24-hr rainfall event (use
the IDF below)
RAINFALL INTENSITY IN INCHES PER HOUR
20.0
15.0
10.0
8.0
6.0
4.0
0.8
X
0.2
0.1
0.08
0.06
0.04
0.02
II
ப____
lud
6
VDOT B, D & E eqn.
except for 1-year
10
NOAA Atlas 14
Vienna/Tysons
for 1-year
15 20
MINUTES
30
RETURN
40 50 60
EN PERIOD (YEARS)
25
10
DURATION
NOAA Atlas 14
Vienna/Tysons
2
3
4 5 6
HOURS
8 10 12
18 24
-

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