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A 6.0-hr storm rains on a 25.0 mi2 drainage watershed. Records from a stream gauging stations are shown in the table below.
t, (hr) Q, (ft 3/sec)0 03 4006 13009 250012 170015 120018 80021 60024 40027 30030 20033 10036 0Total 9500
(a) construct the unit hydrograph for the 6.0-hr storm.
(b) Determine the runoff rate at t = 15.0 hr from a two storm system if the first storm drops 2.0-inches starting at t = 0, and the second storm drops 5.0-incheds starting at t = 12.0 hrs.
Your company is considering the purchase of new earth moving equipment. The total purchase is $240,000 and we pay with $100,000 cash and borrow the rest. (12% per year nominal, compounded monthly for 5 years).
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A household uses 10 therms of natural gas per month in a gas furnace for heating at a cost of $1.00/therm. For an electric heating system the cost of electricity is $0.10/kwh. Compare the cost of the electric heater to deliver the same energy as t..
The aquifer is inhomogeneous with K = 12+0.006x, where x =0 at point 1, and the piezometric heads at point 1 and 2 are 14.2 m and 18.8 m, respectively measured above the upper confining layer.
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