Mill Creek/Umpqua River Watershed
Douglas and Coos Counties, Oregon
Kevin Friscia & Matt Moore Earth Science Majors, Western Oregon University, Monmouth, OR, 97361
ES 341, Fundamental of GIS
Description: The majority of the watershed is composed of the
Tyee Formation. It was deposited in the early Tertiary Period as a
delta sandstone. Other bedrock units included are Tertiary
Sandstone and Yamhill Formation.
WATERSHED PARAMETERS
Parameter
Measurement
Total Drainage Area (sq.meters)
348,166,100
Total Drainage Area (sq.km)
Description: A multitude of soil types are found within the Mill
Creek/Umpqua watershed. Soil types of moist forest climates are
found in thick layers upon forest ground floors. Alluvium from
streams occupy narrow valleys along larger streams.
Description: The watershed exists within the boundaries of
eight different USGS standard series quadrangle maps. They are
Golden Falls, Ivers Peak, Kelley Butte, Elk Peak, Loon Lake, Old
Butte, Deer Head Point, and Scottsburg.
Description: The Digital Orthophoto Quadrangle shows an areal
view of the watershed. Forests, as well as areas of human activity
are displayed within the photo. Historic agricultural zones of
operation can be spotted on the hillsides.
348.2
Total Length of Watershed (sq.km)
34.6
Total Width of Watershed (sq.km)
20.7
Watershed Length/Width Ratio
167:100
Total Number of Subbasins in
Watershed
18
Average Area of Subbasins in
Watershed
Total No. of Stream Segments of
Tributaries in Watershed
19.3
3021
Total No. of First Order Streams
1538
Total No. of Second Order Streams
757
First Order of Stream Frequency
(Total No./ sq.km)
2.17
REFERCENCES
Source
http://gis.oregon.gov/DAS/EISPD/G
EO/sdlibrary.shtml
http://libremap.org/data/state/oregon/
drg/
http://libweb.uoregon.edu/map/map_
section/quad_list.htm
http://www.or.nrcs.usda.gov/pnw_soi
l/or_data.html
http://sagemap.wr.usgs.gov/
http://tin.er.usgs.gov/geology/state/st
ate.php?state=OR
http://www.wou.edu/las/physci/
taylor/es341/es341_w09.htm
Data
Vegetation, DOQ
DRG
DEM
Soil
Precipitation
Geology
Roads, Streams, Watershed
*mmoore06@wou.edu, *kfresca@wou.edu
Description: A digital raster grid shows the topographic
anomalies and elevation values of terrain within the watershed.
Bodies of water are shown in blue and heavily forested areas are
outlined in green.
Description: Streams intersect the watershed in dendritic
drainage patterns. Most timbers are outlined in dark grof the area
is overlain by douglas fir trees mixed with western hemlocks and
grand firs. Recently harvested een.
Description: The annual precipitation within the watershed
varies between 53 and 83 inches. Eastern areas receive less
precipitation on average. Western areas exist nearer to the pacific
ocean, where most all moisture transpires from.
Description: Relative elevation values are displayed within the
Digital elevation map. Orange values are shown as higher points.,
while whiter values are lower. The range of elevations grades
between 780 and 20 feet about sea level.