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Problem 1:
A triangular shaped swale is to retain the runoff from a catchment with a design runoff rate of .01 m3/sec. The longitudinal slope of the swale is to be 1.5% with side slopes of 5:1 (H:V). If the grassed swale has a Manning’s n of 0.030 and a minimum infiltration rate of 200 mm/hr,determine the length of the swale required.
Problem 2:
A large circular parking lot with a diameter of 400 feet is being constructed as overflow parking for the state fair grounds. All stormwater will drain as sheet flow to the center, flow into a drop inlet, and travel through a pipe system to the nearest stream. The parking lot will be mowed grass (clay soil) with a slope of 2 percent toward the center. The 2-yr, 24-hr rainfall is 2.4 inches. Using SCS procedures to determine the time of concentration and IDF curve in the power point slides, determine the 10-year peak discharge that will be required to design the pipe system.
Two links AB and B, each 25 in. long are connected at B and guided by hydraulic cylinders attached at A and D. Knowing that D is stationary and that the velocity of A is 30 in./s to the ight
The US EPA has published the following data for the release to the Florida environment of sulfuric acid (H2SO4 ), the most widely used industrial chemical (in millions of pounds).
A 4m deep clay layer is underlain by impermeable shale. A sample of clay from the layer is subjected to an appropriate increment of stress in a consolidation test giving the following results:
For a given load increment, the time for 50% consolidation was 5 min 20 sec. How long will it take for 50 % consolidation of a similar clay layer in the field that is 8.2 ft thick & drained on one side only
Lines of levels were run requiring (n) instrument setups. If the road reading for each backsight and foresight has a standard deviation of +-0.005 ft what is the standard deviation for n=40
A hawk flying at 2 m/s at an altitude of 45 m accidentally drops its prey. The parabolic trajectory of the falling prey is described by the equation below until it hits the ground, where y is its height above the ground and x is its horizontal dis..
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
The pressure inside a 4 cm hose is 700 kPa. If the water exits through a 2 cm diameter nozzle, what velocity in m/s, can be expected inside the hose ?
The wet mass of a sample of saturated soil is 520 grams. The dry mass, after oven-drying, is 400 grams. Determine the a) water content b)void ration c)saturated unit weight, and d)effective unit weight
In taping from A to B, a tree on-line necessitated setting an intermediate point C offset 4.5ft to the side of line AB. Line AC was then measured as 368.92ft along a uniform 4% slope
If metal sorption to algae can be modeled by a Langmuir isotherm, determine the mass distribution (sorbed vs dissolved) of lead in the marsh.
The article "Leachate from Land Disposal Residential Construction Waste" (authored by W.J. Weber, Y.-C Jang, T.G. Townsend, and S. Laux, Journal of Environmental Engineering, 128(3): 237 - 245, 2002) presents a study on contamination
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