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

introduction methodology conclusions objective results

|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

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

|methodology| Map building

|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

|results| Channel Elevation

MayJune |results| Total Monthly Precipitation (in.) 0.0 – – – – – – – – – – – – – – – – – – – – 10.0 JulyAugustSeptemberOctoberNovemberDecember JanuaryFebruaryMarch April May June

|results| Snow Water Equivalents (in.) JulyAugustSeptemberOctoberNovemberDecemberJanuaryFebruaryMarchAprilMayJune – – – – – – – 35.0

|results| Undisturbed flow

|results| Dam impacted flow

|results| Dam impacted flow

|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

|references|      . 0 3)/Lone%20Mountain%20Summit.jpg          Images

|questions|