Lower Siletz Watershed– Lincoln County, Oregon
Prepared by:
Mark Barnes & Brandon Button
ES 341
Physiography
The Lower Siletz Watershed has very low elevations because it is closer to
the coast and has a large amount of vegetation cover due to the amount of
precipitation.
Watershed Location
The Lower Siletz Watershed is located in the Northern end of Lincoln
County, the Lower Siletz River itself flows south and then to the east.
It is south of Lincoln city and north of Newport.
Hydrologic Summary
Figure 5: This shows all of the streams and all the Sub-Basins in the Lower
Siletz Watershed. Figures 6 & 7: These show the Precipitation numbers for
the Lower Siletz Watershed. The amounts are very large because the
watershed is in the coast range which receives large amounts precipitation.
Figure 9: DOQ (Digital Orthophoto Quad’s)
Figure 1: Counties that
surround the Lower Siletz
Watershed.
Figure 2: Lower Siletz Watershed in Oregon.
Figure 10: DEM (Digital Elevation Model)
General Geology
The Geology of the Lower Siletz is comprised of many different bed rocks
There are so many different types of soils we were not able to identify all of
them.
Figure 5: Lower Siletz Streams
and Sub-basin.
Figure 6: Lower Siletz Precipitation
And Streams.
Conclusions
The Lower Siletz Watershed is a very unique and beautiful area. It is
comprised of many different. It is full of many different plant life and
made up of many soils and bedrocks.
Figure 3: Lower Siletz Watershed
Geology. (Bed Rock)
Figure 7: Annual Precipitation.
Vegetation
Figure 8: The Vegetation is common with the coast range, comprising of
Firs, Maples, Alders, and lots of forest floor covers.
Figure 8: Lower Siletz Vegetation.
Figure 4: Lower Siletz
Watershed Soils.
References Cited
Dept. of Agricutlure. "Natural Resources Data Department."
Http://www.oregon.gov/DAS/EISPD/GEO/index.shtml.
Dept. of Agricutlure. "Natural Resources Data Department."
Http://www.oregon.gov/DAS/EISPD/GEO/index.shtm
University of Oregon: Geographic information Systems
http://libweb.uoregon.edu/map/map_section/quad_list.htm