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a) A pool of Tetrachloroethylene (PCE) has formed above a vertical fracture of circular cross section having an average diameter, D, of 2 mm. Water pressure conditions in the fracture and the overlying aquifer are hydrostatic. Estimate the height of the PCE pool, Hc that must form above the fracture entrance before DNAPL invasion of the fracture takes place.
b) If the fracture were planar in shape, having an average opening of 2 mm, what would the new value of Hc be?
for sizing the syst em, the mean cell residence time is selected to be 5 days. the reactoer kinetic constants are u max= 2.4 d^-1 (1/day), Ks=75 mg/L as COD, Y=0.4 VSS/g COD and Kd=0.096 d^-1(1/day)
The specific storage of a 45-m thick confined aquifer is 3.0 X 10^-5 m^-1. How much water would the aquifer produce if the piezometric surface is lowered by 10 m over an area of 1 km^2
What textbooks are used and required for CIVE 205, MECH 289, CIVE 290, EPSC 221 and MATH 263 at McGill?
What is the highest downward speed (the terminal velocity), in miles per hour, ? At the terminal velocity the downward force (the weight) is equal to the upward force (the aerodynamic drag force).
Wastewater flow is 80 gpcd with 170 mg/l BOD and 190 mg/l suspended solids. Size the extended aeration basin and clarifier using the minimum detention time and overflow rates. Calculate the average F/M using an MLSS of 1000 mg/l.
If the rocket's decent parachute does not deploy and the rocket lands 340 ft from A, determine the angle (alpha) that vo forms with the vertical, the maximum height h reached by the rocket, and the duration of the flight.
A hurricane has an average rainfall of 9 in over a 200 mile^2 watershed. What is the reservoir in acre-ft that would be required to contain 20% of the rain completely
Biomass is increasingly used as a fuel to produce power and heat. A sugarcane-? processing mill is powered by a biomass power plant with 140 MW of electricity and with 60 MW of heat in the form of steam for sugar extraction from the cane.
A 2000-lb wheel load is to be supported by aggregate over soil with a maximum bearing pressure of 1000 lb/sqft. What depth of aggregate is needed if the angle theta is 40 degrees
An adiabatic argon unit compresses argon at 200 kPa and 27C to 2.18 MPa. If the Argon leaves this compressor at 513C. What is the isentropic efficiency of the compressor
The treated wastewater has a BOD of 12 mg/L and a k of 0.0338 1/d. The Broad River has a flow rate of 0.43 m3/s and an ultimate BOD of 5.0 mg/L.
Knowing that the coefficient of static friction is 0.25 at all surfaces of contact, determine the smallest fprce P that should be applied to one of the wedges.
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