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h igure 111. 1V1ap of l olorado Water Division 7 and its administrative districts <br />69 <br />O <br />' <br />O C7 <br />C <br />i O� <br />O O <br />6 <br />e <br />r <br />�, • • e <br />r e •r- <br />• <br />• 0 <br />i <br />i <br />� 46 <br />• • <br />A - December to March Precipitation (single season) <br />O <br />0 <br />In summary, the results of the analysis in this Division indicate that ENSO HCI <br />variables are in fact important (and not a surprise given the general research literature <br />available). However, the preliminary results indicate that a number of other factors are <br />involved in the overall response in the basin including Atlantic influences. Given the <br />availability and reliability of data, precipitation analyses were conducted in Districts 30, <br />32, 34 and 71 were conducted with 2, 3, 2 and 2 stations respectively. <br />For some years or individual periods, one station may not have been available <br />therefore only one station would have utilized to calculate basin average precipitation. <br />However, for most Districts and periods analyzed over 90% of all available data was <br />available. It is hoped that having at least two stations in a District does provide a true <br />representation of precipitation with respect to the basin as a whole. <br />All Districts: <br />The results of this period are similar enough to summarize in one paragraph. For <br />Districts 30, 32 and 71 the well -known ENSO indices do in fact have a reasonable <br />relationship with precipitation in these basins. However, in looking at the charts for each <br />leading period it should be noted that La Nina period have a low probability of <br />experiencing above normal (> 100 %) precipitation while `El Nino' years contain a high <br />degree of variability. An example of this generally observed pattern can be seen in <br />Figure 11. <br />In <br />