1. Hydrology of the Snake River in Hells Canyon Wil Sarchet GIS in Water Resources

2. introduction methodology conclusions objective results

3. |introduction| Snake River  Originates in Yellowstone Park in northwest Wyoming  Outlets into the Columbia River in southeast Washington  River’s length is 1040 miles  Watershed drains 108,000 sq. miles Welcome to Hells Canyon Hells Canyon  Carved by Snake River  North America’s deepest river gorge at 7993 feet deep  10 miles wide flow

4. |objective| Examine the relationship between snow, precipitation, slope, and flow in Hells Canyon

5. |methodology| Map building

6. |methodology| Data points NCDC  Precipitation  Total for month USGS  Flow  Monthly average Snotel  Snow Water Equivalents  Monthly average  Amount of water in snowpack  Depth of water if snowpack melted

7. |results| Channel Elevation

8. MayJune |results| Total Monthly Precipitation (in.) 0.0 – 0.5 0.5 – 1.0 1.0 – 1.5 1.5 – 2.0 2.0 – 2.5 2.5 – 3.0 3.0 – 3.5 3.5 – 4.0 4.0 – 4.5 4.5 – 5.0 5.0 – 5.5 5.5 – 6.0 6.0 – 6.5 6.5 – 7.0 7.0 – 7.5 7.5 – 8.0 8.0 – 8.5 8.5 – 9.0 9.0 – 9.5 9.5 – 10.0 JulyAugustSeptemberOctoberNovemberDecember JanuaryFebruaryMarch April May June 2000 2005 2001 2006

9. |results| Snow Water Equivalents (in.) JulyAugustSeptemberOctoberNovemberDecemberJanuaryFebruaryMarchAprilMayJune 2000 2005 2001 2006 0.0 – 5.0 5.0 – 10.0 10.0 – 15.0 15.0 – 20.0 20.0 – 25.0 25.0 – 30.0 30.0 – 35.0

10. |results| Undisturbed flow

11. |results| Dam impacted flow

12. |results| Dam impacted flow

13. |conclusions|  Snowfall has a direct effect on river flow  Precipitation does not have as strong a correlation to river flow  Dams significantly alter the hydrology of the river

14. |references|  http://www.fs.fed.us/hellscanyon/overview/maps.shtml  http://en.wikipedia.org/wiki/Image:Map_of_USA_with_state_names.svg  http://www.fs.fed.us/hellscanyon/overview/index.shtml  http://www.luminous-landscape.com/tutorials/exposing_snow.shtml  http://lennthompson.typepad.com/photos/uncategorized/rain_1.jpg .http://www.desktopscenes.com/Scenes%20from%20Big%20Sky%20Country%20(20 0 3)/Lone%20Mountain%20Summit.jpg  http://www.icwhen.com/ncc14/topics/waikato/images/image-0001.jpg  http://geoimages.berkeley.edu/Waterfalls/Idaho/ShoshoneFallsL.html  http://www.visitusa.com/oregon/images/hellscanyonorpic.jpg  http://www.windingwatersrafting.com/gallery_app.php  http://209.20.186.111/images/Idaho/HellsCanyon2.jpg  http://en.wikipedia.org/wiki/Snake_river  Http://en.wikipedia.org/wiki/Image:Hells-canyon-dam-id-us.jpg  http://en.wikipedia.org/wiki/Image:Oxbow_Hydroelectric_dam.jpg  http://www.ifskiclub.com/Portals/0/Photos/Yellowstone.JPG Images

15. |questions|