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13 May, 16:54

The Hoover Dam (see the Video) backs up the Colorado River and creates Lake Meade, which is approximately 115 miles long and has a surface area of approximately 225 square miles. If during flood conditions the Colorado River flows into the lake at a rate of 43800 cfs and the outflow from the dam is 6200 cfs, how many feet per 24-hr day will the lake level rise?

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  1. 13 May, 20:38
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    Answer: 0.518

    Explanation: Total Area of lake = 225 sq miles = 6.273e+9 sq feet

    Change in volume per second = 43800-6200 = 37600 cfs

    Change in volume per day = 37600 * 3600 * 24 = 3.249e+9 cfd

    Total rise of water level per day = Change in volume per day/Total lake area

    = 3.249e+9/6.273E+9 = 0.518 feet/day
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