Michael Wines, An Underground Pool Drying Up
Portions of the High Plains Aquifer are rapidly being depleted by farmers who are pumping too much water to irrigate their crops, particularly in the southern half in Kansas, Oklahoma and Texas. Levels have declined up to 242 feet in some areas, from predevelopment — before substantial groundwater irrigation began — to 2011. (via An Underground Pool Drying Up - Graphic - NYTimes.com)
Watershed Study - how the springtime water flows around Lake Ontario on the Canada-US border.