A reservoir with a length of 20 km and width of 3 km has a flood inflow of 1000

Question

A reservoir with a length of 20 km and width of 3 km has a flood inflow of 1000 m^3/s. (a) If exit flow is restricted to 500 m^3/s, how fast is the water level rising in the reservoir per day? (Answer is between 0.5-1 m/day). (b) If the exit flow is a spillway that follows the formula for flow over a weir (Ch. 3), set up the mass balance equation that governs the rise of water. Will water levels rise at the same rate as in (a), at a lesser rate, or a greater rate? What three additional pieces of information would we need to solve the problem

Explanation / Answer

rise in level =((1000-500)*24*3600)/(20000*3000)=.72 metres

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