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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.
A Particle is traveling on a straight line with velocity v=(3t^2-6t) where t is in sec. if s=4 ft when t=0, determine the position of the particle when t=4s. what is the total distance traveled during time interval t=0 to t=4s?
A solid one-way slab is to be used for a framing system Column spacing is 33 ft, with regularly spaced beams occurring at 11 ft center to center. Superimposed dead load on the structure is 50 psf and the live load is 75 psf.
A civil engineering student contends that 60 mph is safe in a van because of the higher drivers line of site. If all other design inputs are standard, what must the drivers eye height be in the van for the students claim to be valid
What is the magnitude of the maximum stress that exists at the tip of an internal crack having a radius of curvature of 5.5× 10-4 mm (2.165 ×10-5 in.) and a crack length of 3.5 ×10-2 mm (1.378 × 10-3in.)
The coefficient of rolling resistance can be taken to be a constant for all speeds, equal to 0.008. If the cyclist is coasting down a 6% grade, what is the maximum speed attained
What is the (a) eulerian acceleration at point x = 1, y = 2, z = 3 for the following velocity field? (b) what is the lagrangian acceleration for the same point?
Base course aggregate has a target dry density of 119.7 lb/cu ft in place. It will be laid down and compacted in a rectangular street repair area of 2000 ft x 48 ft x 6 in. The aggregate in the stockpile contains 3.1 percent moisture.
An undisturbed chunk of soil has a wet weight of 62 lb and a volume of 0.56 ft3. When dried out in an oven, the soil weighs 50 lb. If the specific gravity of soilds is found to be 2.64
the wind reaches a speed of 27.8 m/s in a storm. calculate the force acting on a 1m x 2m window facing the storm. the window is in a high-rise building. the air density p= 1.2 kg/m3.
A geotechnical report has suggested an allowable bearing pressure of 200kPa. Determine the minimum size of the pad footing for a steel column if a factor of safety of 2.0 is recommended (include an estimate of self weight of the footing in your calcu..
What is the aqueous phase CO2 concentration (mg/L) of a watersample that is not in equilibrium with the atmosphere and has a pH= 7.1, an alkalinity of 300 mg/L and a temperature of 25 degrees C?
Find the volume of the solid S. The base of S is the region enclosed by the parabola y=4-3x^(2) and the x-axis. Cross sections perpendicular to the y-axis are squares.
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