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• The measured rainfall in the Starkville - Trinidad area was <br />0.27 inches on !•lay 12, 1982. These flow measurement were taken <br />approximately 4 hours after rainfall had ceased. Since the amount <br />of precipitation was not large, it is assumed that a majority was <br />taken back into the soil as recharge to soil moisture. Some runoff <br />into Starkville Gulch was observed and sampled during the storm. <br />However, flow in the normally dry upper Starkville Gulch stream- <br />bed had ceased sometime prior to 1 hour after the storm. This <br />supports the conclusion that the flow measured in Starkville Gulch <br />and Raton Creek are representative of normal seasonal flow rather <br />than reflecting the rainfall event. <br />Open channel flow measurements were made in Raton Creek down- <br />steam of the confluence with Starkville Gulch, and in Starkville <br />Gulch just prior to its entering Raton Creek. <br />The velocity of flow was determined using the measurement by <br />• float method.Z A surface float was employed which was immersed <br />to approximately one-fourth of the water depth. For flow deter- <br />mination, a relatively straight portion of the channel was chosen, <br />with little upstream pooling, riffles or constrictions. Three <br />cross-sections were measured along a reach at each site. <br />Raton Creek's discharge was 1.00 cfs, substantially less <br />than a peak flow measurement. The drainage area is 60.5 sq mi <br />giving a unit runoff of 0.017 cfs/sq mi. Zt is likely that the <br />discharge rate reflects a combination of storm runoff and base <br />flow, with the latter making a greater contribution. <br />Z~Aater I•teasurement t4anual. United States Dept. of the Interior, <br />Hureau of Reclamation, Denver,Colorado, 1981. <br /> <br />164 FISHER, HARDEN 6 FISHER <br />