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by saalweachter
1163 days ago
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> How much rain did fall on Hamburg in 2022 given a city size in square kilometers, and an average fall of cm/day. Oh, now you're in US customary unit territory. Let me introduce you to the acre-foot. The acre-foot is the unit of measure for reservoirs. For instance, the Ashokan reservoir is 8300 acres with an average depth of 46 feet. Its volume is 381,800 acre-feet. If an area 10,000 acres received 3 inches of rain, you need 2500 acre-feet of reservoir to put the outflow in. How big do you need to make your 2500 acre-foot reservoir? Well, if you're working with 100 acres, you make it 25 feet deep. |
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