Question

what is the flow capacity of a 48 in diameter circular concrete culvert with HW/D = 0.9

Answer #1

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A 100-ft long horizontal concrete pipe culvert (n = 0.012) is to
be sized to carry 38 cfs. The tailwater depth is TW = 3.5 ft. The
inlet will be square edged (ke = 0.5), and the headwater depth, HW,
is not to exceed 4.5 ft. Select a suitable culvert diameter under
outlet control condition.

A 36" concrete culvert is usually submerged on both ends during
storm events. The culvert runs under a roadway and is 60 ft long.
What is the flow rate with a 6", 18", and 30" difference in water
level between the inlet and outlet? Assume a Ke of 0.5 and a Kc of
0.0237.

Design the seepage pit for a septic tank using four ft diameter
circular concrete pits. Assume groundwater is 20 feet below the
surface and with silty soils. The expected design flow is 400
gallons per day. The perc test gave a percolation rate of 12
gallons per day per ft^2. Determine the depth of installation, the
length of the concrete pit, and the number of pits.

what is the diameter of a concrete storm sewer for design flow
Q= 30 cfs from manhole station 16+00 (inv 150.5ft) to station
14+00(inv 150.50ft)

A concrete pipe on a 1% slope is flowing 1/3 full. The pipe
diameter is 36". What is the flow rate?

Consider the concrete block of diameter D = 1.3 m, given below.
The specific gravity of sea water and concrete block are equal to
SGseawater= 1.03 and SGconcrete= 2.2. The
water depths h1 = 3 m, h2 = 1.8 m, and
concrete block thickness t = 0.4 m. Take for water density
ρW = 1000 kg/m3, gravitational acceleration
g= 9.81 m/s2 and π= 3.14

46. A cylindrical concrete pile with a diameter of 8 in.
and a length of 10 ft. is to be used to support a foundation in
clay soil. Calculate the end bearing (EB) and skin friction (SF)
for this pile. Assume c = 25 kPa, Nc = 9, and α = 1.
a. EB = 33.56 kN, SF = 7.545 kN b. EB = 3.27 kip, SF =
7.439 kip c. EB = 1.11 kip, SF = 8.65 kip d....

A semi-circular channel 3m in diameter has a maximum discharge
capacity 8 m3/sec when running full. Its capacity is required to be
augmented to 10.8m3/s by raising its bank vertically. Use Mannings
. (a) Find the minimum height to which the banks should be raised.
(b) Compute the slope of the new channel bed if n = 0.012. (c)
Compute the average depth of water in the channel

A circular storm water sewer 1.5 m in diameter and effective
roughness size 0.6 mm is
laid to a slope of 1:500. Determine the maximum discharge which the
sewer will convey
under uniform open channel conditions. If a steady inflow from
surface runoff exceeds the
maximum open channel capacity by 20%, show that the sewer will
become pressurised
(surcharged) and calculate the hydraulic gradient necessary to
convey the new flow.

18. In the circular flow, what are the leakages GDP? What are
the injections to GDP?

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