Calculate the volume of water in the dam at the end of the year assuming no outflows for downstream uses. b) In the event that the end of year storage exceeds the full supply capacity, how much water will be spilled from the dam? c) If 40 million cubic metres of water is supplied to the City of Cape Town during the same year, and an average of 0.4 m3 /s is released as outflows for downstream water uses, what will be the end of year storage in the dam?
The Berg River Dam has a full supply capacity of 130 million cubic metres of water, and a surface area of 4.88 km2
.
Suppose that at the beginning of the year this dam has 50 million cubic metres, and receives 2000 mm/yr of rainfall
over the dam, and loses 1200 mm/yr through evaporation. The average inflow during the same year is 2.5 m3
/s.
a) Calculate the volume of water in the dam at the end of the year assuming no outflows for downstream uses.
b) In the event that the end of year storage exceeds the full supply capacity, how much water will be spilled from
the dam?
c) If 40 million cubic metres of water is supplied to the City of Cape Town during the same year, and an average
of 0.4 m3
/s is released as outflows for downstream water uses, what will be the end of year storage in the dam?
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