Sedimentation Lesson 1: “Dirty” Water. What will we study in this unit?  Dirt (soil) in water  Soil in the water is an important nonpoint source of.

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Presentation transcript:

Sedimentation Lesson 1: “Dirty” Water

What will we study in this unit?  Dirt (soil) in water  Soil in the water is an important nonpoint source of pollution

It’s time for a demonstration  In front of you, you have two containers  How should you label these containers?

What is sedimentation?  Sediment is the dirt (soil) that goes into water and eventually settles down  Sedimentation is the process of the soil going into the water  Total Suspended Solids is how sediment is measured while suspended in water

What does sediment in water look like?

Water with very little sedimentation

Let’s look back at the water containers:  It is clear which container is “dirty” with soil  Do we know for sure that the clear container has no pollution?

Water Pollution  Pollution is anything in the water that is harmful to life  Water pollution can come from different sources: Point source Point source Nonpoint source Nonpoint source

Point Source Pollution

Nonpoint Source Pollution

What is the word used to describe the area over which the runoff water from rain flows into a body of water (lake, river, stream)?

Watershed  All land is in a watershed of some body of water (stream, river, lake, ocean)  A watershed is the area of land whose runoff water feeds a specific body of water  Are we in a watershed?

Sedimentation in a watershed  Particulate matter (sediment) gets into the water from soils in the watershed  There are many sources of sediment, and therefore it is a nonpoint source

Important terms:  Sediment  Sedimentation  Pollution  Nonpoint source pollution  Point source pollution  Watershed