Date post: | 19-Dec-2015 |
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Henry Hagg Lake
Water Quality Report
Location
The testing site- Boat dock A
A close up look at site
Hypothesis
• Water quality would decrease over the summer –temp. would raise, nitrate increase, oxygen decrease
• Measurements– PH– Temperature– Nitrates– Dissolved oxygen
Temperature
• Temperature is very important to water quality– Temp Oxygen– It effects the rate of photosynthesis by plants and
the sensitivity of organisms to toxic wastes and disease
– The sun raises the temperature of water as well as thermal pollution from industry
Dissolved Oxygen
• Dissolved oxygen is important to the health of aquatic ecosystems– A decrease can endanger species– High levels of bacteria from sewage or rotting
plants can cause % of saturation to decrease– A raise in water temperature can also decrease
saturation
Nitrate
• Nitrate is a nutrient needed by all aquatic plants and animals– Decomposition of dead plants and animals and
excretions of living animals contribute to nitrate levels
– Sewage is the main source of excess nitrate as well as agricultural runoff
– Excess levels of nitrate can increase plant growth and therefore decrease % oxygen saturation
pH
• pH can be affected by– Industrial waste– Agricultural runoff– Drainage from poorly operated mining operations– Many animals can be affected by even small
changes in pH levels
DataDate Dissolved
OxygenPH Air Temp
/Water TempNitrates
7-19 88% 6.5 58/70 0
7-27 44% 6.5 62/72 0
8-9 44% 6.5 60/70 0
8-18 46% 6.5 64/72 0
8-26 44% 6.5 62/70 0
Conclusion
16-Jul 21-Jul 26-Jul 31-Jul 5-Aug 10-Aug 15-Aug 20-Aug 25-Aug 30-Aug0
10
20
30
40
50
60
70
80
90
100
PHWater Temp.Air Temp.Disolved Oxygen