Sunday, May 31, 2015

Second Water Quality Survey of Spring Season

On 5/15/15, the intrepid River Spies braved inclement weather and tested Amazon Creek water quality in Amazon Park. Our site was in line with 26th Avenue and just west of Amazon Pool. We accessed Amazon Creek from the east side adjacent to the bike path. The River Spies measured water temperature, turbidity, dissolved oxygen, and pH.

The River Spies!

The Amazon Creek site had a water temperature of 11℃ - a degree cooler than our previous water testing site. We attributed the cooler water temperature to the shading provided by vegetation surrounding the banks. 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 0 JTU. We made sure to collect water before we stirred up any creek bed sediment. 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.
Dissolved Oxygen
The Amazon Creek site had a DO reading of 2ppm. The slow rate of flow may account for the low dissolved oxygen reading. 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 7.5. A majority of freshwater organisms 
live within a pH range of 5.5 to 7.5. 

Later, I entered our data on the World Water Monitoring website

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