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A truck spils 1 gallon of benzene into an aquifer with an area= 50ft^2 Benzene has a solubility of 1750 ppm, and a specific gravity of 0.873. The aquifer ahs a porosity of 0.25, a hydraulic gradient of 0.004 and a hydraulic conductivity of 1000 gpd/ft2.
a. what is the discharge through the aquifer in gpd?
b. How long will it take the water in the aquifer to travel 100 ft?
c. How long will it take to remove 99% of the benzene from the aquifer? Assume that the volume of aquifer affected is 500 ft^2
A 300 mm diameter pipe is placed in a 3 m deep rectangular trench that is 0.60 m wide. The trench is backfilled with clay that has a bulk unit weight of 18.8 kN/m3. Compute the dead load due to backfill that the pipe must support.
After the cone of depression has achieved equilibrium, the piezometric heads at two observation wells 40 and 95 m from the pumping well are measured as 78.9 and 83.4 above sea level, respectively.
the weigt w causes atension of 100 lb ic cable cd. if d=2ft, what is the moment about the z axis due to the force eserted by he cable cd at point c.
What is the conversion rate for parts per million by volume (ppmv)conversion. How is this converted into atm, Pa, and torr?
The roadway is to be widened which will require a slope face cut at a steeper angle. Assume zero cohesion along the joints. What engineering parameter must the joint surfaces possess (magnitude) to be stable
A rectangular channel has water flowing at a depth of 1.6 ft with a corresponding specific energy of 1.736 ft. A step up on the channel bed resulte in the flow becoming critical. The critical depth is 1.29 ft and corresponding specific energy is 1..
A wastewater treatment plant receives 15 mgd of flow, with solids concentration of 230 mg/L. How many pounds of solids enter the plant every year
A 800 m vertical curve joins a -3% grade line to a 5% grade line. The PVI of the curve is at station 6200 and its elevation is 600.6 ft. Compute the elevations at 100-ft stations throughout the curve.
Pore water pressure is to be observed during the construction of the embankment. Calculate the pore water pressure which must not be exceeded at any point in the clay layer 9 m below the surface of the embankment to ensure a shear strength of 100 ..
Based on your results, determine the after-tax income that you will need in order to afford the residence. Note that being qualified for a mortgage does not necessarily mean that one can actually "afford" the residence.
Write the following iterated integral as a double integral with aregion R, and use the change of variables to compute the integral:∫x=2x=0∫y=√(2x-x²)y=0√(x²+y²) dy dx
Course Ab of a five sided traverse runs due north. From the giben balanced interior angles to the right, compute and tabulate the bearings and azimuths from north for each side of the traverses.
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