usgs

Map of the Day - Groundwater Depletion Across the U.S. #GWAwarenessWeek

U.S. Geological Survey's (USGS) map of groundwater depletion
It's Groundwater Awareness Week 2017 (#GWAwarenessWeek if you're on twitter)! Today's Critical Issues Map of the Day from the USGS and shows the cumulative depletion of groundwater for 40 aquifer systems across the U.S (excluding Alaska). The map depicts depletion over the time period of 1900 to 2008 and is measured in cubic kilometers. 

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