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Watersheds

Watersheds. ESI. N. A map of streams in an area. streams. Can you determine the watershed for this stream?. N. Major stream in watershed. Drainage divide high spot or ridge. N. A. B. What is general streamflow direction? Any water flowing north?. Cross-section. Drainage Divide.

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Watersheds

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  1. Watersheds ESI

  2. N A map of streams in an area streams Can you determine the watershed for this stream?

  3. N Major stream in watershed Drainage divide high spot or ridge N A B What is general streamflow direction? Any water flowing north? Cross-section

  4. Drainage Divide Runoff to the west Runoff to the east Looking north up ridge B A Cross-section

  5. N Major streams in watershed headwaters Watershed boundary headwaters Tributary to major stream mouth main channel mouth

  6. Drop in elevation, feet Stream Gradient = Distance traveled, miles (average) Stream Gradient Water flows downhill ! -Idiot’s Guide to Stream Hydrology headwaters Drop in elevation mouth Distance traveled Typical stream gradient in Prince George’s County – xxx ft/mi

  7. N Area of collection of precipitation

  8. Steps in the hydrologic cycle • precipitation • runoff and stream – surface flow • evaporation • transpiration • infiltration • groundwater (subsurface) flow evapotranpiration

  9. precipitation runoff transpiration evaporation infiltration groundwater

  10. N Watershed subwatershed Even smaller subwatershed

  11. Nested watersheds airshed watershed Watershed is like a funnel Container such as Chesapeake Bay

  12. Watershed and Airshed of Chesapeake Bay

  13. http://www.dnr.state.md.us/streams/acid/page4.html

  14. Maryland’s Watersheds To the Delaware Bay watershed To the Mississippi River Watershed East coast continent divide 95% of Maryland drains water into the Chesapeake Bay To the Atlantic Ocean directly http://mddnr.chesapeakebay.net/wsprofiles/surf/prof/prof.html

  15. Potomac River Watershed Patuxent River Watershed Drainage Divide in Prince George’s County

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