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Watersheds. Surface Water Definition: fresh water on the Earth’s land surface – Is found in lakes, rivers, streams, and wetlands Types of surface waters.

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Presentation on theme: "Watersheds. Surface Water Definition: fresh water on the Earth’s land surface – Is found in lakes, rivers, streams, and wetlands Types of surface waters."— Presentation transcript:

1 Watersheds

2 Surface Water Definition: fresh water on the Earth’s land surface – Is found in lakes, rivers, streams, and wetlands Types of surface waters are: – River systems Mississippi, Amazon, Nile – Watersheds Definition: area of land that is drained by a river – Example: Mississippi Watershed

3

4 Definition - The total land that contributes water (or drains into) a particular waterway. Can also be called a "Drainage Basin" A Watershed

5 All of the water within the area drains into the central waterway and to a specific point along that waterway. A Watershed

6 The drain board under a kitchen sink drying rack is like a watershed. Watershed or Drainage Basin The "Dry Dish" Watershed

7 Water always follows the path of least resistance.... DOWNHILL! Water that flows through a Watershed: -Streams, Creeks, and Rivers -Surface runoff (water across the land surface) -Groundwater (under the surface) All three interact with each other! Go with the Flow

8 Flow: Streams and Rivers

9 Surface Runoff can also be called Overland Flow Includes over forested land, grassland, and parking lots Flow: Surface Runoff AAFtU/tAwW5Z1C9JI/s400/parking+lot+runoff+2.JPG Tdk69LGaoMMKXvWPCWAB_rtk4OXaaz63sOa-

10 Under the surface Groundwater is on the move Flow: Groundwater

11 The Water Cycle provides the water to create these three types of flow. Fuel for the Flow: The Water Cycle

12 TOPOGRAPHY (Shape of the lands surface) Watersheds Land Area Determines what area will make up a watershed

13 Low points in a watershed: Stream or river itself, the very bottom Watershed Topography

14 Highpoints in a watershed: Hills, Mountains, or ridges surrounding the waterway. Watershed Topography content/uploads/2009/03/rotui-web.jpg

15 The watershed boundary is created by the high points of land surrounding a waterway Watershed Boundary Watershed Boundary

16 Any water within the boundary of your watershed or precipitation that falls within the boundary will flow into your waterway Watershed Boundary

17 A ny water OUTSIDE the boundary of your watershed or precipitation that falls OUTSIDE the boundary will flow into a different waterway is part of a different watershed. Watershed Boundary

18 The watershed boundary is the dividing line between two watersheds Watershed boundaries are sometimes called Watershed Divides Watershed Boundary

19 Does your favorite stream have a watershed? Many Watersheds gif All waterways, large or small, have a watershed. Waterways always have land surrounding them that drain into them. Small creek=Small watershed Large Creek=Larger Watershed

20 waterways flow into one another. small creeks flow into Large creeks which flow into LARGER creeks or a river! Build up a Waterway f

21 Watersheds interact with one another too. Small watersheds make up Larger Watersheds which make up Even LARGER Watersheds Build up a Watershed sippi_map.jpg

22 Watersheds work on different scales small creeks have small watersheds large creeks include the watersheds of many small creeks rivers include the combined watersheds of many large creeks Scale Allegheny River French Creek Suga r Cree k

23 Is there any place on land that is not part of a watershed? No Watersheds Somewhere? No, Everywhere you stand on the Earth's land surface drains somewhere, so it is part of a watershed, whether big or small.

24 Small watershed? Big watershed? Where does your water flow to? Which of the major watersheds in Costa Rica are you in? What is YOUR Watershed?

25 Our Water Cycle The Fuel that Runs the Watershed Watershed Impacts

26 Land and waterway interaction Watershed Impacts (Rural) What we do on our land affects our waterways

27 Land and waterway interaction Watershed Impacts (Urban) What we do on our land affects our waterways g

28 Land and waterway interaction Watershed Impacts (Residential) What we do on our land affects our waterways

29 We influence our waterway and watershed Direct Impact on Waterway Dumping into creek, littering into creek Impact on Land Surrounding Waterway (Watershed) Poor land use decisions Disturbing the land without minimal impact Contributing to pollution on the land Watershed Impacts

30 We are connected to others downstream Our waterway flows into other waterways Our watershed drains into other watersheds Our mess/pollution travels downstream Watershed Impacts Downstream

31 What will YOU do to protect your watershed? Watershed Impacts


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