7 GSL water quality spatial variations

7.1 Salinity on elevation

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2010-20162010-2016 regression2017-present2017-present regressionGilbert Bay surface salinity ~ lake elevationWSE (feet)Salinity (g/L)

Figure 7.1: Regression of surface salinity concentrations on Gilbert Bay surface elevation.

7.2 Phosphorus on elevation

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Total phosphorusTotal phosphorus regressionFiltered phosphorusFiltered phosphorus regressionSurface phosphorus ~ lake elevationGilbert Bay elevation (feet)Phosphorus (mg/L)

Figure 7.2: Regressions of surface phosphorus concentrations on Gilbert Bay surface elevation.

7.3 Nitrogen on elevation

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Total nitrogenTotal nitrogen regressionFiltered nitrogenFiltered nitrogen regressionSurface nitrogen ~ lake elevationGilbert Bay elevation (feet)Nitrogen (mg/L)

Figure 7.3: Regressions of surface nitrogen concentrations on Gilbert Bay surface elevation.