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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />9 <br /> <br />IV. RESULTS OF HYDROLOGIC ANALYSIS <br />Runoff hydrographs for the 2-, 5-, 10-, and lOO-year existing and future <br />conditions at the north Airport boundary for the Hayesmount and Tributary and <br />Box Elder Basins are given in Figures 11 through 22. Tables 4 and 5 give peak <br />flows for each design point for existing, and future with airport conditions. <br />There is no major difference between existing and future conditions for Box <br />Elder Creek Basin because of minimum development for future basin conditions <br />within the study area. Figures 23 through 28 sho~1 the discharge-probabil ity <br />profile for Hayesmount Gulch and Tributary, and Box Elder Creek. In general, <br />Hayesmount Gulch Basin, Hayesmount Tributary Basin, and Basins 78 through 82 <br />have major differences in now rates between existing and future basin con- <br />ditions due to the increase of imperviousness because of proposed Airport <br />facil ities. The rest of the basins have less difference in flow rates for <br />existing and future conditions because of similarity in land use. <br />