File talk:High plains fresh groundwater usage 2000.svg

imperial/metic conversion

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]