ROADSIDE CHANNELS

SEVERAL ERODED ROADSIDE CHANNELS WERE OBSERVED FOR AN 18-MONTH PERIOD TO DETERMINE SOIL LOSSES AND THE PEAK FLOW RATES CAUSING THESE LOSSES. STAKES AND MEASURING FLUMES WERE USED FOR THESE DETERMINATIONS. ERODED CHANNELS WERE REGRADED, FERTILIZED, SEEDED AND LINED WITH TEMPORARY LINER MATERIALS. LINERS TESTED WERE JUTE MESH, EXCELSIOR MAT AND FIBER GLASS ROVING WITH ASPHALTIC CEMENT. IN EACH TEST, RUNOFF RATES SUFFICIENT TO CAUSE SEVERE EROSION OCCURRED IN UNLINED CHANNEL SECTIONS. DEPTHS OF FLOW WERE DETERMINED FOR THE LINED AND UNLINED PORTIONS OF THE TEST CHANNELS. THIS INFORMATION WAS USED TO EQUATE DEPTH OF FLOW VERSUS EROSION ON CHANNEL SLOPES PROTECTED WITH JUTE MESH AND FIBER GLASS ROVING WITH ASPHALTIC CEMENT AND A CHECK WITH BARE SOIL. THE CONCLUSIONS REPORTED ARE: (1) ROADSIDE EROSION IS A SERIOUS PROBLEM BECAUSE OF ASSOCIATED HAZARDOUS CONDITIONS; (2) WELL DEVELOPED TURF WILL WITHSTAND FLOW RATES ANTICIPATED FOR MOST ROADSIDE CHANNELS; AND (3) TEMPORARY LINERS ARE NECESSARY TO PROTECT NEWLY SEEDED CHANNELS FROM EROSIVE FLOWS DURING THE CRITICAL PERIOD BETWEEN SEEDING AND ESTABLISHMENT. THE REPORT INCLUDED RECOMMENDED MATERIALS (JUTE MESH AND FIBER GLASS ROVING) AND METHODS OF INSTALLATION OF TEMPORARY LINERS. DESIGN PROCEDURES FOR COMPACTED-SOIL CHECK DAMS ARE DESCRIBED. SUGGESTED SPECIFICATION REVISIONS ARE INCLUDED IN THE APPENDIX. /AUTHOR/

  • Corporate Authors:

    Louisiana Department of Highways

    P.O. Box 44245, Capitol Station
    Baton Rouge, LA  USA  70804

    Bureau of Public Roads /US

    400 7th Street, SW
    Washington, DC  USA  20590
  • Authors:
    • Cox, A L
    • ADAMS, R C
  • Publication Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 00204016
  • Record Type: Publication
  • Source Agency: Bureau of Public Roads /US
  • Report/Paper Numbers: 63-2m
  • Files: TRIS, STATEDOT
  • Created Date: Jul 27 1970 12:00AM