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<br />BASEFLOW SALT YIELDS ON SMALL STREAMS IN THE PRICE RIVER BASIN, UTAH7 <br /> <br />w <br />w <br />~' Background <br />00 <br /> <br />Concurrent with the study of summer storm runoff on ephemeral washes in <br />the Price River Basin which is described elsewhere in this report, weekly <br />monitoring of discharge and salinity was also conducted at five intermit- <br />tent stream sites and 13 perennial stream sites in the Price River Basin <br />(Fig. 11). The purpose of the monitoring study was to determine average water <br />quality as indexed by EC of baseflows, and to contrast the relative importance <br />of salt loading from basef10ws with that from storm runoff. Also provided is <br />an analysis of the basef10w contribution of Desert Seep Wash to the total salt <br />load on the Price River at Woodside, Utah. <br /> <br />The 18 si tes se1 ected for monitori ngcovered the foll owi ng tributary streams <br />of the Price River: Gordon Creek, Miller Creek, Coal Creek, Soldier Creek, <br />Marsing Wash, Washboard Wash, and Icelander Creek (Fig. 11). These streams <br />represent all the major tributaries of the basin. The selected streams all <br />traverse major Mancos shale areas in the basin. <br /> <br />For the ten-week study period, monitoring of basef10ws at these sites was <br />interrupted by extensive storm runoff during early October. However, there <br />are sufficient data to estimate average basef10w discharge and EC values from <br />the data collected in September and late October. <br /> <br />Resul ts <br /> <br />Results of the basef10w monitoring program are provided in Table 10. <br /> <br />Table 11: Ranking of estimated basef10w discharge and salt delivery rate <br />among the monitored sites. <br /> <br />Stati on 10 <br /> <br />Estimated <br />Baseflow , Salt <br />Del ivery Rate <br />1 ,000 t/year <br /> <br />71 <br />22 <br />8 <br />3 <br />3 <br />2 <br />2 <br /> <br />Estimated <br />Baseflow <br />Runoff, <br />m3s- <br /> <br />18 Marsing Wash <br />17 Washboard Wash <br />3 Coal Creek at Hwy 6 <br />13 Miller Creek at Hwy 10 <br />2 Lower Gordon Creek <br />15 Icelander Creek at Hwy 6 <br />11 Lower Soldier Creek <br /> <br />0.85 <br />0.28 <br />0.06 <br />0.06 <br />0.06 <br />0.03 <br />0.03 <br /> <br />I Detailed study results provided in USDI (1982a). <br /> <br />31 <br /> <br />.,,' ~ ---'"' <br /> <br />