hydrographs_2013-2014_monitoring_we.png

Figure 31. Hydrographs for 2013-2014 for a monitoring wells in Centre County, PA near State College. The red diamonds show the water level (hydraulic head) measured in depth below the land surface. Black triangles show the historical mean, and colored bars show historical percentiles for water level (red=  <10%; orange = 10-24%; green = 25-75%; light blue = 76-90%; dark blue = >90%). Note that the water level in the Sacramento example is near the all-time historical low, whereas in Centre County the water level is near the historical mean.
Originally uploaded in Integrate:Teaching for Sustainability:InTeGrate Modules:Water Science and Society:Student Materials.

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Source: USGS, 10/4/2014
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