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A sewage plant releases 250 m3/day of effluents containing 195 ppm of a chemical at the center of a wide, slowly meandering stream. The stream is 2.4 m deep and the bed slope is 0.00011.
a) Calculate the shear velocity.
b) Estimate the vertical and transverse mixing coefficients.
c) Assuming that the effluent is completely mixed over the vertical, determine the width of the plume and the maximum concentration 1200 m downstream of the discharge point.Assume uniform equilibrium flow conditions in the river and flow velocity v=1.1 m/s.
An embankment for a highway 30 m wide and 1.5 m in compacted thickness is to be constructed from a sandy soil trucked from a borrow pit. The water content, w
A new athletics stadium with a curved concrete roof is beingdesigned. Each of the end walls is 25 metres long. Its height ymetres is given by
Hypothetically, upon leaving the filling station, tire pressure for each tire on the 18-wheeler was measured as 105 psi (gauge), and the wheel contact area with the ground was a 6.0 in by 7.0 in rectangle.
Derive the porosity values for cubic, orthorhombic, and rhombohedral packing of spheres. Include sketches supporting your calculations of the bulk volumes of the unit cells.
The soil properties are Cc = 0.4, Cr = 0.1 and fsat = 18 kN/m3 for both clays, and the water table is 1 m below the soil surface. Determine the settlements when a stress of 60 kPa is applied by the building.
Each month the speedy dry Cleaning company buys 1 barrel (0.160 m^3)of dry cleaning fluid . Ninety percent of the fluid is lost to the atmosphere and 10 percent remains as residue to be disposed of
for this purpose replace this force by its equivalent of two forces at At Ft parallel and Fn perpendicular to the beam. Determine Ft and Fn.
Starting from rest, the boy runs outward in the radial direction from the center of the platform with a constantacceleration of 0.5 m/s2. If the platform is rotating ata constant rate θ=0.2 rad/s,
A reinforced concrete beam d = 18 in , and n = 10. find the diamensions b and a , that will resist a bending movement of 60 kip,ft with balanced stress reinforcement if fc =1600 psi and fs = 20 ksi
A long line of burning agricultural waste emits 0.3 g/m/s of particulate matter on a clear fall afternoon with winds blowing 3 m/s perpendicular to the line. Estimate the ground-level particulate concentration 400 m downwind from the line.
The flowrate in a rectangular channel is 20 m3/s. The width of the channel is 4 m and the depth of flow is 5 m. If there is an increase in the channel bottom elevation (?z) with NO energy loss, what is the maximum value of ?z possible with no increas..
The motion of a box on a spiral conveyor is defined by the following position vector: r = 0.5sin(2t) i + 0.5cos(2t) j - 0.2t k where r is in meters and t is in seconds. Find the location, velocity, and acceleration when t = 0.8 s.
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