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You are in charge to investigate the characteristic of a small river that can be assumed as a uniform and rectangular cross-section for modeling purpose. The width of the river is 10 ft, the depth is 1 ft, longitudinal slope of 0.001, and the Manning's coefficients is 0.03. To estimate travel times and dispersion coefficients, you injected 50 gm of rhodamine dye at one bank of the river because it will spread out soon enough. You also began the steady bubbling of propane, a gaseous tracer into the river at this location.
a. Your assistant is measuring the rhodamine concentration 1 km downstream. The data when converted to a spatial distribution at t = 2500 sec after dye release, show the following: 95% of the mass lies between 800 m and 1200 m at time t = 2500 sec. Estimate the longitudinal dispersion.
b. Your other assistant is measuring the propane (C3H8) concentrations, which are 75 microM at 200 m downstream and 52 microM at 1500 m downstream. What is the reaeration coefficient if it is assumed that no dilution occurred due to lateral flow?
c. How far downstream must your assistant go to collect the sample near shore that is representative of the entire channel cross-section?
What are the SPCS83 coordinates and convergence angle for a station in the Colorado Central zone with geodetic coordinates of 39° 44' 40.74141"N, 105° 00' 07.48466"W
A garage (24 ft x 24 ft x 10 ft) is illuminated by (6) 60 watt incandescent bulbs. It is estimated that 90% of the energy to an incandescent bulb is dissipated as heat. If the bulbs are left on for 3 hours, how much would the temperature in the ga..
To avoid shrinkage cracks in the grout, what should be the total expansion and total bleeding in term of percentage for the grout?
Given the data , design a section of sanitary sewer to carry these flows at minimum velocity of 2.5 fps. Assume that the minimum depth of the sewer below the street must be 8.5 ft and that an n value of 0.013 is applicable.
An alloy contains 55 weight % Ni and 45 weight% Cu. What are the ATOMIC PERCENTAGES of Ni and Cu in this alloy
The traffic that makes a left turnat an intersection consists of two types of vehicles, Type A andB. A type A vehicle is twice the length of the type B. THe left turn lane can accommodate ten vehicles of type B, five oftype A.
to achive a specific level of disinfection a water treatment plant operator determines the" Ct" value 180mg min/l is necessary with units for disinfectant concentration C in mg/l and disinfectant contact time t in minutes
Compare to units, A and B. A has a new cost of $42,000, at life expectancy of 14 years, a salvage value of $4,000, and an annual operating cost of $3,000. B has a new cost of $21,000, a life expectancy of 7 years
A proposal has been submitted to replace a group of assembly workers, each working individually, with an assembly line. The following table gives the individual work elements. The demand rate for this job is 1600 units/week (assume 40h/week)
design a horizontal curve for a two-lane road. The road has 12-ft. lanes. Due to expansive excavation, it is determined that a maximum of 34 ft. can be cleared from the road's centerline toward the inside lane to provide for stopping sight distanc..
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.
What is the submerged discharge head loss. By what percentage is this loss reduced if the provision of a draft tube increases the discharge flow area to six times the size.
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