The lack of rainfall in Kansas in 2011 led to intense declines in groundwater levels around the state.

The Ogallala Aquifer in southwest Kansas usually sees annual declines, but its decline in 2011 was one of the worst in decades. Officials with the Kansas Geological Survey said the aquifer there dropped an average 3.78 feet in 2011. That’s compared to a drop of about 3 feet in 2010 and 1.39 feet in 2009.

Much of Kansas received 25 to 50 percent of normal precipitation last year.

In central and south-central Kansas where groundwater levels usually show gains or only modest declines, the water table in the Equus Beds decreased an average 3.17 feet, and Big Bend district No. 5 dropped an average 3 feet.