{ Lab: Water Quality in the Pajaro Valley. What is a watershed?

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Presentation transcript:

{ Lab: Water Quality in the Pajaro Valley

What is a watershed?

What do watersheds do for us and all the living things around them?

Eutrophication 1.Fertilizer containing nitrogen (N) & phosphorous (P) runs off into water 2.Algae grow & reproduce fast 3.Algae die 4.Bacteria break down dead algae 5.Bacteria use up all oxygen in water 6.All organisms die without oxygen Pinto Lake (Sept 2010 – LA Times)

Water Quality Tests: pH Stomach acid Vinegar Lemon juice Pure water Baking soda Soap Bleach Acidic Neutral Basic

Water Quality Tests: Nitrate () Nitrate (NO 3 ) Contained in fertilizer O O O N

Water Quality Tests: Phosphate (PO 4 ) Contained in Fertilizer Soap/detergent O O O OP

Water Quality Tests: Dissolved Oxygen (O 2 ) All animals breathe oxygen! Reduced by eutrophication O O

Water Quality Tests: Turbidity Turbidity = cloudiness of the water from dirt & algae

pHNitratePhosphate Dissolved Oxygen Turbidity Choose TWO tests to do

Tap Water Pinto Lake Pacific Ocean Pajaro River Watsonville Slough 5 Sites

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