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A gravel-packed well with an effective diameter of 36 in is to be constructed in an aquifer with T = 2.6 x l04 gpd/ft and S = 2.3 x 10-5. The design flow of the well is 1000 gpm. Calculate the drawdown at the well (use r which is the distance from the pumping well = 18 in) with total withdrawals from storage after (a) 1 min, (b) 1 h, (c) 1 day, (d) 1 month, and (e) 1 yr of continuous pumping, at design capacity. Repeat the calculations for r = 1m and 100m. (conversions: 1m3/d/m = 80.517 g/d/ft, 1 in = 25.4 mm, 1 gpm = 5.45 m3/d)
The point of intersection of the centerline of Elm Road with the centerline of first Street was originally recorded (using a 30-m steel tape) as being at 6 + 71.225. How far from existing sation mark 5 + 00 on first street would a surveyor have to
A perfectly mixed aeration pond with no recycle (return line) serves as the biological reactor for a small community. The pond receives 30 cubic meters/day of influent with a BOD5 of 350 mg/L that must be reduced to 20 mg/L before discharge.
A PVC pipe with a diameter of 30 inches will carry a flow of 20 cfs. the bottom slope is 0.005 and the roughness coefficient is 0.015. determine the normal depth, critical depth, velocity and the froude number.
A square yellow-brass bar must not stretch more than 2.5 mm when it is subjected to a tensile load. Knowing that E = 1.5 GPa and that the allowable tensile strength is 150 MPa
What is the final equilibrium temperature of the two bodies?
For satisfactory operation, the static pressure at the pump inlet must not be lower than -6 m of water gage. Determine the smallest standard commercial pipe that will give the required performance.
A vertical gate keeps water from flowing in a triangular irrigation channel. The channel has a 4-m top width and a 3-m depth. If the channel is full, what is the magnitude of the hydrostatic force on the triangular gate and its location
a dam project specifies 97 compaction. lab tests on the soil being used indicate that it has anbspmaximum dry density
A 60 MW Rankine steam power cycle in Iceland uses reheat. The system is comprised of a single adiabatic pump, a boiler using geothermal energy, two adiabatic turbine stages and a condenser. Water as the working fluid, which enters the 1st turbine sta..
Calculate the tensile modulus of elasticity for a 10 laminated composite consisting of 62 percent by volume of unidirectional carbon fibers and an epoxy matrix under isostress conditions.
Flow occurs in a rectangular channel of 6 m width and has a specifi c energy of 3 m. Plot the q-curve. Determine from curve
Find the uniform annual amount that is equivalent to a uniform gradient series in which the first year’s payment is $500, the second year’s payment is $600, the third year’s payment is $7000, and so on, and there is a total of 20 payments.
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