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<br /> <br />FIGURE I. <br />LOCATION OF FLOOD WARNING GAGE: SITES <br /> <br />2.1 Rating Curves <br />Rating curves were developed for both gage sites using <br />cross section data provided by the CWCB a.nd the U. S. Army <br />Corps of Enginl;ers HEC-2 model. They were prepared for the <br />downstream sidl;s of both bridges at. the gage si.tes. Since <br />flood warning is delivered on the rising limb of the flood, <br />it was unneces:;;ary to rate t.he bridsre ove,rflow sect:ions at <br />both gages in o:t:"der to define, flood vlarning. Both t,he lower <br />and upper alarm levels should be exceeded by the time sig- <br />nificant flow occurs in the overflow channels. <br />Additionally, there was not enough data. available to pre- <br />pare accurate :t:"ating curves for the wide Kiowa Creek valley <br />at the two flood warning gage sites, The rating curve for <br /> <br />3 <br />