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<br /> <br />O!J2533 <br /> <br />Figure 6. <br /> <br />7-39. <br /> <br />Map showing location of sampling sites, study reach of Yampa <br />River, September 23-24, 1975 . . . . . <br />Graphs showing: <br />7. Mean temperature and mean concentrations of selected <br />water-quality constituents in the Yampa River, <br />September 23-24, 1975 . . . . . . . . . . . . . . . <br />8. Concentrations of total-coliform and fecal-coliform <br />bacteria in the Yampa River, September 23-24, 1975. <br />9. Diel variation in concentrations of total-coliform and <br />fecal-coliform bacteria in the Yampa River downstream <br />from campgrounds near Steamboat Springs, site YM-4, <br />September 23-24, 1975 . . . . . . . . . . . . . . . <br />10. Diel variation in concentrations of dissolved oxygen <br />at selected sites on the Yampa River, September <br />23-24, 1975 . . . . . . . . . . . . . . . . . . . . <br />11. Least-squares method ,of calculating decay rates and <br />concentrations of biochemical oxygen demand, Yampa <br />River downstream from Steamboat II near Steamboat <br />Springs, site YM-5. . . . . . . . . . . . . . . . . <br />12. Decay rate of carbonaceous biochemical oxygen demand <br />for given subreaches downstream from reference <br />location YM-4, Yampa River, Steamboat Springs area, <br />September 23-24, 1975 . . . . . . . . . . . . . . . <br />13. Die-off rates of total-coliform and fecal-coliform <br />bacteria for given subreaches downstream from refer- <br />ence location YM-4, Yampa River, Steamboat Springs <br />area, September 23-24, 1975 . . . . . . . . . . . . <br />14. Computed versus observed concentrations of ultimate- <br />carbonaceous biochemical oxygen demand in the Yampa <br />River, September 23-24, 1975. . . . . . . . . . . . <br />15. Computed versus observed concentrations of dissolved <br />oxygen in the Yampa River, September 23-24, 1975. . <br />16, Computed versus observed concentrations of organic <br />nitrogen in the Yampa River, September 23-24, 1975. <br />17. Computed versus observed concentrations of ammonia <br />nitrogen in the Yampa River, September 23-24, 1975. <br />18. Computed versus observed concentrations of nitrite <br />plus nitrate as nitrogen in the Yampa River, <br />September 23-24, 1975 . . . . . . . . .. . . . . <br />19. Computed versus observed concentrations of total <br />nitrogen in the Yampa River, September 23-24, 1975. <br />20. Computed versus observed concentrations of orthophos- <br />phate in the Yampa River, September 23-24, 1975 <br />21. Computed versus observed concentrations of fecal- <br />coliform bacteria in the Yampa River, September <br />23-24, 1975 . . . . . . . . . . . . . . . . . . <br />22. Computed versus observed concentrations of total- <br />coliform bacteria in the Yampa River, September <br />23-24, 1975 . . . . . . . . . . . . . . . . . . <br /> <br />IV <br /> <br />Page <br /> <br />10 <br /> <br />15 <br /> <br />17 <br /> <br />18 <br /> <br />19 <br /> <br />21 <br /> <br />22 <br /> <br />23 <br /> <br />25 <br /> <br />27 <br /> <br />29 <br /> <br />30 <br /> <br />31 <br /> <br />32 <br /> <br />34 <br /> <br />36 <br /> <br />37 <br />