Projects > Water Quality Monitoring > Summer 2007
The Spruce Creek Water Quality Monitoring project was conducted for the third summer in 2007 to establish a water quality baseline of existing conditions. The percent dissolved oxygen saturation is a good calculation of the health of the water. The oxygen holding capacity of water is a function of temperature and salinity. It is possible for water to hold >100% capacity when the input of oxygen from algae or plants is greater than the transfer of oxygen to the air.
2007
Analysis
Generally speaking,
down-stream stations 1, 2 and 3, have less variability in oxygen saturation
than the upstream stations, 5 and 6. The variability increases with increasing
distance upstream. The results the 2007 survey show the same general trends
as the comparable 2005 and 2006 data.
All stations appear to be tidally influenced based on salinity measurements. Stations 1, 2, 3, and 4 (from Bond Road to the Trading Post) have higher salinity levels in general than the up stream stations, which is likely due to the down stream stations’ proximity to the ocean influences. The water column at each station appears to be fully mixed based on similar levels of DO, salinity, and temperature at each depth per station. The full mixing is likely due to the tidal currents and shallow depths.
The table below summarizes the oxygen saturation data for the 6 stations sampled for seasons 2007, 2006 and 2005. While stations 5 and 6 have the highest mean measured saturation, they also have a higher frequency of low readings, indicating how variable the measurements were at those stations. This can be typical of tidally influenced waters. As stated previously, all three seasons of data show similar trends from upstream to down-stream in oxygen saturations.
The following table shows the percent occurrence of low DO measurements at each of the six sites.
View all of the 2007 Water Quality Monitoring Data as well as the analysis of the 2007 findings (in PDF format).
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