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<br />were reviewed by 'the Sacramento District, Corps of Engineers, U" 8. <br /> <br /> <br />Geological Survey, U. S. 80il conserviOl'tion Service and .the Colorado <br /> <br /> <br />Wat,er Conservation Board. The result,s were concur,;-ed by t:hese <br /> <br /> <br />agencies. As indicated in Table 1, there an~ 12 stcrearn gauging <br /> <br /> <br />stations used to establish regional curves for selected recurrE,nce <br /> <br /> <br />intervals in the study area. Stations with short, period s1:atis,tics <br /> <br /> <br />were compared with stations with loner period value!, in this hydroloCfic <br /> <br /> <br />area according to the procedures susrerested by WRE (RefE!renCe 8) , <br /> <br /> <br />'['he short periOd statistics were not: adjusted due '[;0 poor correla- <br /> <br /> <br />tions between short period statistics and long peri6d values. 'rable <br /> <br /> <br />2 presents flood peak discharges from flood flow frequency analysis <br /> <br /> <br />for each stream gauging station. <br /> <br />Flood flow frequency curves fOJ:" snowm"dt:, rainfall and combined snow-- <br /> <br /> <br />melt and rainfall events are pJ:"esented in Figures 5 to 16 in Appendix <br /> <br /> <br />A. A copy of the flood flow fJ:"equency analysis comput,er printout, <br /> <br /> <br />which includes all data and computations for each st:ream crauging' sta-- <br /> <br /> <br />tion, is included in Appendix I3. The H!sul ts of regression analysis <br /> <br /> <br />for regional curves of selected reCUrrE!rlCe in'tervals are shown in <br /> <br /> <br />Figure 4. These curves were bosed for jeterming peak discharges for <br /> <br /> <br />water surface profiles computations _ P'2,ak discharges used in hydraulic <br /> <br /> <br />computations at various locations are 1 i sted in 'l'able 3. <br /> <br />COMMENTS <br />Hydrologic data presented in this repoc', are based on historical data <br />which include sediment and debris normally associated \<lith flood flows. <br />Unusual flood situations, such as mud :flows and large amounts of debris <br />that would increase the severity of floods, cannot be iclent:ified with-- <br />out extensive studies. A flood of this nature will probably exceed <br /> <br />-7- <br />