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<br /> <br /> 0 ~ <br />(J) <br />w <br />:r 50 '\J <br />u <br />~ <br />Z 100 <br />W 150 <br />U <br />~ <br />'" 200 <br />::l <br />(J) <br />'" 250 <br />~ - sITE 1 <br />~ 300 - - - SITE 2 <br />~ 350 <br />...J <br />w 400 <br />III <br />:r <br />li: 450 <br />w <br />C <br /> 500 <br /> JFMAMJJASONDJ FMAMJJASDNDJ FMAMJJASON <br /> MONTHS <br /> 1985 1986 1987 <br /> <br /> <br /> <br />Figure 10.--Secchi-disk measurements, sites 1 and 2 <br />in Kenney Reservoir, water years 1985-87. <br /> <br />The relation of turbidity and suspended-solids concentrations to Secchi- <br />disk measurements and the relation of suspended-solids concentrations to <br />turbidity (tables 13 and 14 in the "Hydrologic Data" section) were nonlinear. <br />After log transformations of turbidity, suspended-solids concentrations, and <br />Secchi-disk measurements, the relations of turbidity and suspended solids to <br />Secchi-disk measurements were inverse and linear and are shown in figure 11. <br />A positive and linear relation ofsuspende<j-solids concentrations to turbidity <br />is shown in figure 12. The large values for the coefficients of determination <br />(r2) (figs. 11 and 12) were obtained because light penetration is closely <br />associated with turbidity and because fine silts and clays that accounted for <br />most of the suspended material in the reservoir were uniformly distributed. <br /> <br />22 <br />