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<br />unit hydro graphs were converted lnto an lIS" curve" The "Sit curve "oJa.s <br /> <br />cCllC'parecl to the Animas River at Farmington, N.N. "s" curve and the Hermosa <br /> <br />b3.sin "S" curve. The curves compared favorably a.nd a reg:lonal "s" curve:J <br /> <br />as sh01,n on Figure 3, was used :tn computing the flood flo~'s on the Dolores <br /> <br />River system above the town of Dolores, except for the local area between <br /> <br />t:,1C junction of West Dolores and Dolores River, and the town of Dolores. <br /> <br />The regional "s" curve is beli~ved to be n:.ore applicable to timbered <br /> <br />terrain and since Lost Canyon Creek basin, and 1:112 local area upstream of <br /> <br />Dolores are below the timber line, have different: soil conditions, and are <br /> <br />considered to be part of desert footh111s, i,t ,,'as determ:ined that the <br /> <br />rcg10nal "s" curve would not be applicable. A different shaped unit <br /> <br />hydrograph '"as developed for these areas using the Snyder unit hydro graph <br />v <br /> <br />approach. <br /> <br />The October 13, 1941 storm and resulting flood was used to optimize <br /> <br />a unit hydrograph and the complimentary Snyder c'J,dlficients for Lost <br /> <br />Cemyon Creek. The 1941 storm produced the only m,:ijor flood event in the <br /> <br />bc:sin during the short period that the gage was i_n operation. The unit <br /> <br />hydrographs developed for Lost Canyon Creek and the Dolores River an,as <br /> <br />"ere revie"ed and the 0011: hydro graph dilta developed for this study are <br /> <br />sbown on Table 4. <br /> <br />5. <br />