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gage. The classification of years is done to facilitate the presentation and <br />interpretation of hydrologic conditions and resulting analysis. The WMS study period <br />is water year 1947 through water year 2006. These years are classified as Wet (25% <br />wettest years), Dry (25% driest years), and Average (remaining years). The 60 year <br />period results in 30 Average, 15 Wet, and 15 Dry years. The hydrologic period of <br />record for the Water Action Plan and the FEIS ended in 1994. Inclusion of the years <br />1995-2006 in the WMS add five of the seven lowest flow years in the 60-year study <br />period. Figure 3-1 entitled "Classification of Water Years Based on Average Annual <br />Flow at Overton (1947-2006)" presents the classification graphically for the average <br />annual flows at the Overton gage. Table 3-4 entitled "Classification of Water Years <br />Based on Average Annual Flow at Overton (1947-2006) details the classification and <br />the associated average annual flow at Overton. <br />Figure 3-1 <br />Classification of Water Years Based on <br />Average Annual Flow at Overton (1947-2006) <br />6000 <br /> <br /> <br />5500 <br />5000 <br /> <br />4500 <br /> <br />? <br />u <br />4000 <br />c <br />? <br />? <br />? <br />p 3500 <br /> <br />r <br />A <br />0 3000 <br />? <br />E <br />R <br />2 2500 <br /> <br />? <br />d <br />A 2000 <br /> <br />d <br />> <br />a 1500 <br /> <br /> <br />1000 <br /> <br />500 <br /> <br /> <br />0 <br /> <br />? o ?n o ?n o ?n o in o ?n o 0 <br />? ? N t0 (O t- f? 00 OD O <br />01 ? T ? ? ? ? ? Of 01 ? O O <br />N N <br /> <br /> ? <br />Wet <br />Dry 25°!o wettest years <br />25% driest years <br />Avera e Remainin ears in eriod <br /> <br /> <br /> <br />y <br />m <br />3 <br /> <br /> <br /> <br /> <br /> m <br />? <br /> L <br />m <br />> <br />Q <br /> <br /> ? <br />? <br /> <br />00WLE Page 15 of 58 January 29, 2008 <br />PRRIP - Draft Water Management Study, Phase I