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<br />~~:. ., <br /> <br />together with the spatial envelope factor and the 10% increase from the 24-hour value to the 72- <br />hour value. <br /> <br />31. Appendix I, (April 2, 2003 meeting) page 9. where did the area size adjustment of21% <br />come from? <br /> <br />A W A response to Ouestion 31. <br /> <br />Section 8 discusses several aspects ofthe NWSSSS. One ofthe issues discussed is the spatial <br />distribution of rainfall in Colorado vs the spatial distribution of storms used in HMR 52 spatial <br />analyses. That discussion begins on page 109 ofthe Final Report. The last paragraph on page <br />110 discusses the comparison of rainfall amounts for various area sizes to the 10-square mile <br />rainfall amounts for Colorado storms and for the 29 storms used in HMR 52. Using Figure 8.3 <br />and the area size of the Cherry Creek drainage, the percent of rainfall compared with the 10- <br />square mile amount is 64% for Colorado storms and 81 % for the 29 storms used in HMR 52. <br />Using these values, Colorado storms are 21 % (64% 181 %) smaller at the area size of the Cherry <br />Creek drainage basin than the 29 storms used in HMR 52. <br />