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WATERSHEDS AND POLLUTION

WATERSHEDS AND POLLUTION. What is a Watershed?. A watershed is simply: an area of land where runoff collects and then is a water supply to a large lake or river. It is also known as a Drainage Basin. What is a Watershed?. The larger the body of water, the larger the watershed.

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WATERSHEDS AND POLLUTION

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  1. WATERSHEDS AND POLLUTION

  2. What is a Watershed? • A watershed is simply: an area of land where runoff collects and then is a water supply to a large lake or river. • It is also known as a Drainage Basin

  3. What is a Watershed? • The larger the body of water, the larger the watershed. Mississippi River Watershed Colorado River Watershed

  4. What Is a Watershed? Center for Watershed Protection

  5. Divide – A ridge of land that separates one watershed from another. Tributary – A stream or river that flows into a larger body of water. Watershed- an area of land that drains into a stream, river or lake.

  6. Russian Dolls and Watersheds? • Russian Dolls – each large doll has a smaller doll inside • Watersheds – each large watershed is formed by many smaller watersheds. • In Texas there are approximately 210 watersheds! What local watershed are we part of ?

  7. Who Lives in a Watershed? • Everyone! Major US Watersheds Elm Fork Trinity River

  8. How are Watersheds Different? • Each watershed has its own unique characteristics • Climate – rainfall, temperature, etc. • Geology – elevation, slope, soil, underlying rock, etc. • Vegetation – grass, trees, desert • Land Use by Humans – forests, wetland, agriculture, urban

  9. Why Should We Care About Watersheds? • Because what we do in a watershed affects our water quality and our lives! • It affects our water for drinking, and industrial use • It affects flooding and coastal erosion • It affects our health • It affects the health of ecosystems • Healthy ecosystems = Healthy environment = Healthy, happy people 

  10. Surface water - Water that is found on Earth’s surface. EX: streams, lakes, ponds or oceans. Surface and Groundwater

  11. Reservoir – Groundwater – A lake that stores water for human use. Water that is located underground.

  12. Aquifer – any underground layer of rock or sediment that holds water.

  13. Features Associated with Subsurface Water

  14. Cone of Depression Other than irrigation, what else could impact the water table in this area?

  15. Groundwater Contamination

  16. What is a watershed and how does it affect Earth’s water supply? Supplies water to area rivers and lakes that we use in our homes. What is the relationship between groundwater and surface water in the watershed? Both groundwater and surface water are needed to supply the rivers and lakes in a watershed. Summary

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