Laserfiche WebLink
Draft North & East Metro Groundwater Management Area Plan 4-2 <br /> decades. Below normal precipitation in several recent years is reflected in the declining five-year moving <br /> average precipitation (dotted gray line in Figure 4-1).This is consistent with hydrological data indicating <br /> a recent drier period. <br /> In addition to changes in the amount of annual precipitation, the timing(wetter springs), nature (larger <br /> rain events over shorter periods), and distribution of precipitation also is changing in the midwest'. <br /> Precipitation and other climatic factors affect groundwater recharge and groundwater levels. Relatively <br /> small changes in precipitation over large areas can have a significant effect on groundwater recharge <br /> and groundwater levels. The current climate monitoring network may be inadequate for determining <br /> this important part of the water balance in the GWMA.The network should be evaluated and expanded <br /> to fill data gaps. <br /> 45 <br /> Annual VaeupiIJLion,MSV <br /> --- .l luaulr NUfalidt Vire pill non(19H14010) <br /> S-Ya Moving AVVJ Age Vire 1p lAtion <br /> 40 <br /> 35 <br /> L <br /> � C <br /> ° 30 ` <br /> ` J <br /> a <br /> 25 <br /> j 20 <br /> 15 <br /> 1935 1945 1955 1965 1975 1985 1995 2005 2015 <br /> Figure 4-1 Example of historic precipitation patterns in the North & East Metro: precipitation at <br /> Minneapolis—St. Paul International Airport. <br /> 8 Pryor,S.C., D. Scavia, C. Downer, M.Gaden, L. Iverson, R. Nordstrom,J. Patz, and G. P. Robertson,2014:Ch. 18: <br /> Midwest. Climate Change Impacts in the United States:The Third National Climate Assessment,J. M. Melillo, <br /> Terese(T.C.) Richmond,and G. W. Yohe, Eds., U.S.Global Change Research Program,418-440, <br /> doi:10.7930/JOJ1012N. <br /> P60 <br />