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<br />. <br /> <br />. <br /> <br />. <br /> <br />TBClDfiCAL ADDBNDUII <br /> <br />Sul.phur Creek Basin Hydrol.ogic Investigation <br /> <br />PREFACB <br /> <br />This technical. addendum was prepared to provide the back-up <br />materials, methods and input parameters for The Sulphur Creek Basin <br />Hvdroloqic Investiqation which was performed by the Colorado Water <br />Conservation Board (CWCB) for the Town of Meeker and Rio Blanco <br />County, Colorado. Following a review of the Sulphur Creek Basin, <br />the Board determined that the most feasible method for the <br />development of flood discharges waS through the use of a rainfall- <br />runoff model. There are no stream gage records for the study <br />stream, therefore, a Statistical Analysis (Log Pearson Type III) <br />was not possible and a regional regression equation was limited due <br />to the lack of areal data. <br /> <br />When considering the rainfall-runoff models, the Soil <br />Conservation Service's (SCS) TR 20 Program was more applicable than <br />the U.S. Army Corps of Engineers' HEC-l Program due to the rural <br />nature of the study basin/watershed. The measurable watershed <br />characteristics are more suitable to a TR 20 model than other <br />rainfall-runoff models; therefore, the Board recommended that it be <br />used. <br />