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<br />e, <br />T <br />, <br /> <br />e) <br /> <br />. <br /> <br />DRAFT'SOUTH PLAITE RIVER TRIBUTARIES HYDROLOGY REPORT <br /> <br />FOUR MILE CREEK. HORSE CREEK. WEST CREEK, AND TROUT CREEK <br /> <br />2.3 Routing <br /> <br />The USGS used the Muskingum routing method in their modeling for the all of the South <br />Platte River Tributaries. Because observed hydrograph or field data were not available <br />for calibration of routing parameters, values of Muskingum K (represents the travel time <br />of the flood wave through the routing reach) and the Muskingum X (a dimensionless <br />weighting factor that describes storage effects of a channel) were selected within the <br />range of commonly used values for channels in steep upland watersheds (USGS, 2004). <br /> <br />Muskingum K and X values, shown b(~low from USGS study, were also used in the HEC- <br />HMS model for this study. <br /> <br />. Muskingum K = 0.6 <br />. Muskingum X = 0.4 <br /> <br />Figure 2 illustrates the HEC-HMS routing elements. <br /> <br /> <br />Page 10 <br />