Combined 15-Day Rainfall Accumulation vs. Dam Percent Capacity
This rainfall accumulation vs. dam percent capacity graph shows what happened from 15 through to 30 January. When did the Vaal Dam reach 100% capacity? Choose the correct answer.
The correct answer is C.
The dam reached its capacity on 23 to 24 January. Because of the time lag between the next rainfall event and its arrival at the dam, the dam reached 110% of its capacity on 30 January.