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Printed on recycled paper Arkansas experienced wide extremes in climate variability during the period of 2005 to 2010, recording the largest annual precipitation ever recorded in the State (100.05 inches [in.]) in 2009 (National Weather Service, 2012). Many weather stations across the State reported between 80 to 90 in. of rainfall in 2009. For comparison, the average annual precipitation in Little Rock, Arkansas, for the period 1878 to 2010 was 47.1 in. (fig. 1). In contrast, 2005 and 2010 were the 7th and 14th driest years on record in Little Rock with 34.55 and 36.52 in., respectively; both tied as the hottest years ever recorded in Arkansas (National Oceanic and Atmospheric Administration, 2011). The wettest year on record in Little Rock (2009) was interspersed within these dry years, with a total of 81.79 in. Fifteen weather stations within the State ranked 2009 as the wettest year on record (National Weather Service, 2012). Extremes in annual precipitation rates may lead to greater variability in groundwater recharge rates and water use, particularly in the agricultural areas in eastern Arkansas that rely heavily on groundwater produced from the Mississippi River Valley alluvial aquifer (hereafter referred to as the alluvial aquifer). How does this variability affect the groundwater system and water use therein? Are the effects of this variability discernable in measured water levels in wells? Czarnecki and Schrader (2012) examined these questions and provided some insights, the results of which are presented here.

Drought and deluge: Effects of recent climate variability on groundwater levels in eastern Arkansas