High Plains Aquifer Resources and Information Water-Level Changes, 1980 to 1998
Figure 6. Average annual precipitation, 1981 to 1997, and departure from 30-year (1961 to 1990) normal precipitation (precipitation data from the National Oceanic and Atmospheric Administration, National Climatic Data Center, Asheville, North Carolina, and from A. Dutcher, University of Nebraska-Lincoln, High Plains Climate Center, written commun., 1998).
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