Tuesday, April 14, 2015

Water Quality Testing near Amazon and 24th

On 4/10/15, the River Spies tested water quality in Amazon Creek near 24th Avenue and Amazon Parkway. The River Spies were excited to get their hands wet - along with the rest of their bodies! We measured water temperature, turbidity, dissolved oxygen, and pH.

The Amazon Creek site had a water temperature of 12℃. Aquatic organisms need a certain temperature range to survive and thrive. For a frame of reference, trout and salmon require cool water no greater than 20℃ to survive. Salmon and steelhead need water temperatures less than 13℃ to spawn.

The Amazon Creek site had a turbidity reading of 40 JTU. In general, the less turbid (or less suspended particles) the better. Suspended particles can clog fish gills, smother eggs, block sunlight needed by aquatic plants, and raise water temperature by absorbing heat.

issolved Oxygen
With a DO reading of 2ppm, our Amazon Creek site was about 19% saturated. We conducted the survey just south of where Amazon Creek enters a concrete canal paralleling the bike path. At this particular site, the water is pooled and has a slow flow rate which may account for the low dissolved oxygen reading. 

Cold water can hold more dissolved oxygen than warm water before it is 100% saturated. Bodies of water with high dissolved oxygen levels provide healthy and stable environments for a variety of aquatic organisms. 

Our Amazon Creek site had a pH of 7.0. 
A majority of freshwater organisms 
live within a pH range of 5.5 to 7.5.

I entered our data on the World Water Monitoring website: http://www.monitorwater.org

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