The other day I noticed that the level (elevation) of Lake Powell in the US changed by 0.01 ft:
I thought it would be fun to see how much water is in the 0.01 ft (= 3 mm). Subtracting the contents gives
785 acre-feet
= 970,000 m3
= 0.97 Mm3
= 260 M gallons
= 968 ML.
≈ 1 billion liters
where L=liter. (using little L -- "l" -- for liter can get confusing).
So a water rise of 3 millimeters is about a billion liters of water.
(I assumed vertical edges on the lake, so I can approximate the rise as a being in a box with nice vertical edges. But probably not a good assumption for more than that.)
PS: It's Excel's fault if I made any calculation errors. It always is.
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