ENGINEERING GEOLOGY AND GEOMORPHOLOGY OF STREAMBANK EROSION. REPORT 1. EEL RIVER BASIN, CALIFORNIA

Streambank erosion, including other fluvial modifications, has occurred in the delta region of the Eel River in Humboldt County, California. Two streambank erosion control demonstration sites have been proposed in order to alleviate the loss of property and to evaluate new techniques for bank protection. The purpose of this report was to analyze, describe, and document the factors and causes of streambank erosion in the Eel River delta. The Eel River Basin occupies an area of 3625 square miles and has a length of 120 miles from the river's source on Bald Mountain in Mendocino County to its mouth in the delta region of Humboldt County. With the exception of the delta, all of the basin lies in the rugged and steep coastal ranges of California. The natural environmental conditions present in the basin were found to be conducive to high sediment yields. The conditions included steep slopes, high relief, thin soil cover, and steeply dipping, folded and fractured bedrock. Land use activities, such as grazing, timber harvesting, and road building, were also found to be contributors of high sediment yields. The causes of bank erosion in the delta are believed to be due to the influence of man's activities in an environment that is already predisposed to high sediment production.

  • Corporate Authors:

    U.S. Army Waterways Experiment Station

    3909 Halls Ferry Road
    Vicksburg, MS  USA  39180-6199
  • Authors:
    • SMITH, L M
    • Patrick, D M
  • Publication Date: 1979-9

Media Info

  • Pagination: 83 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00313062
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: WES-GL-79-7 Tech Rpt.
  • Files: TRIS, ATRI
  • Created Date: May 7 1980 12:00AM