Practice Prelim 2

Practice Prelim 2 - CEE 3510 Practice Prelim 2009 1 100 kg...

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CEE 3510 Practice Prelim 2009 1) 100 kg of toxic substance is discharged instantaneously in a river. The river has a cross-sectional area of 100 m 2 , a velocity of 1000 m/hr and a dispersion coefficient of 10 m 2 /sec. Two hrs later a second discharge of the same type and strength as the first occurs at the same point. The instantaneous discharges are spread uniformly across the cross- section of the stream. 5000 m downstream from the discharge point is a very sensitive ecosystem. Determine the concentration of the toxic substance in this sensitive area (5000 m down stream from the discharges) 6 hrs after the first discharge. 8) A chemical manufacturing facility has experienced a number of chemical spills of toxic material into a nearby stream. These spills occur as pulse inputs of 350 kilograms. Concern about contaminating a drinking water supply located 100 kilometers downstream has prompted the company to develop a strain of bacteria to degrade the toxic waste in the river after the spill has occurred. For a 350 kg spill determine the first-
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This note was uploaded on 05/15/2010 for the course CEE 3510 taught by Professor Lion during the Spring '10 term at Cornell.

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Practice Prelim 2 - CEE 3510 Practice Prelim 2009 1 100 kg...

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