File talk:High plains fresh groundwater usage 2000.svg
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imperial/metic conversion
[edit]I flubbed the conversion of 160mgal/mi2 to l/km2. I already checked the gal/mi2 figure against the data sources. Here's the math for the metric conversion:
160M g 3.785 l 0.386 mi2 ------ x ------- x --------- = 233.762M l / km2 mi2 g km2
I don't know where that 15 value came from. Maybe I could get a job at Lockheed Martin.[1]