WATER RESOURCES ENGINEERING
3rd Edition
ISBN: 9781119490579
Author: Mays
Publisher: WILEY
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Question
Chapter 5, Problem 5.3.3P
To determine
The depth of flow 200 ft and 400 ft upstream of the obstruction and the distance of occurrence of the normal depth upstream.
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A semicircular 40 ft diameter− − tunnel is to be built under a150 ft deep− − , 800 ft long− − lake,
as shown below.
a) Determine the horizontal, vertical, and resulting hydrostatic forces acting on this tunnel.
(Answer: 8 8 8
1.398 10 , 2.596 10 , 2.64 10H y netF lbf F lbf F lbf= × = × = × )
b) Calculate the hydrostatic force on the bottom of the lake if the tunnel was not there, and
compare it with the total (resulting) hydrostatic force that you calculated in part (a).
(Answer: 8
2.995 10VF lbf= × )
c) As the design engineer of this tunnel would you take the hydrostatic force on the bottom
of the lake as a rough estimate of the resulting hydrostatic force acting on this tunnel.
Discuss your decision.
3.2 Consi
parabolic equation (Eq. 3.1)
3.3 Again consider Example 3.4. Does this curve
provide sufficient stopping sight distance for a speed of
60 mi/h?
-tangent
grade with a -1% final
mi/h. The station of the
1203 ft. What is the elev
3.4 An equal-tangent crest vertical curve is designed
for 70 mi/h. The high point is at elevation 1011.4 ft. The
initial grade is +2% and the final grade is -1%. What is
the elevation of the PVT?
+00?
3.10 An equal-tangent w
2012 (to 2011 AASHTO
of 70 mi/h to connec
-2.1%. The curve is
design speed in th
technology has adv
design deceleration
value used to dev
percentage of ol
design reaction
vehicles have b
height is assun
roadway obje
3.5 An equal-tangent crest curve has been designed for
70 mi/h to connect a +2% initial grade and a -1% final
grade for a new vehicle that has a 3 ft driver's eye
height; the curve was designed to avoid an object that is
1 ft high. Standard practical stopping distance design
was used but, unlike current design standards,…
Chapter 5 Solutions
WATER RESOURCES ENGINEERING
Ch. 5 - Prob. 5.1.1PCh. 5 - Prob. 5.1.2PCh. 5 - Prob. 5.1.3PCh. 5 - Prob. 5.1.4PCh. 5 - Prob. 5.1.5PCh. 5 - Prob. 5.1.6PCh. 5 - Prob. 5.1.7PCh. 5 - Prob. 5.1.8PCh. 5 - Prob. 5.1.9PCh. 5 - Prob. 5.2.1P
Ch. 5 - Prob. 5.2.2PCh. 5 - Prob. 5.3.1PCh. 5 - Prob. 5.3.2PCh. 5 - Prob. 5.3.3PCh. 5 - Prob. 5.3.4PCh. 5 - Prob. 5.3.5PCh. 5 - Prob. 5.3.6PCh. 5 - Prob. 5.4.1PCh. 5 - Prob. 5.4.2PCh. 5 - Prob. 5.5.1PCh. 5 - Prob. 5.5.2PCh. 5 - Prob. 5.5.3PCh. 5 - Prob. 5.5.4PCh. 5 - Prob. 5.5.5PCh. 5 - Prob. 5.5.6P
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