HYDRAULIC EROSION OF REMOLDED COHESIVE SOILS

THIS STUDY WAS UNDERTAKEN TO GAIN A BETTER UNDERSTANDING OF THE EROSION OF COHESIVE SOILS AND TO DETERMINE THE RELATIONSHIP BETWEEN RATE OF EROSION UNDER STEADY FLOW CONDITIONS AND CRITICAL TRACTIVE STRESS. TESTS WERE CONDUCTED ON SOILS CONTAINING KAOLINITE AND GRUNDITE, AND OTTAWA SAND WAS USED AS AN ADDITIVE IN SOME OF THE SAMPLES. THREE SERIES OF TESTS WERE CONDUCTED TO DETERMINE THE EFFECTS OF TEST DURATION AND TRACTIVE STRESS, DENSITY AND MOISTURE CONTENT, AND TEMPERATURE OF WATER FLOW ON HYDRAULIC EROSION. THE FIRST SERIES REVEALED THAT THERE ARE THREE DISTINCT STAGES OF EROSION UNDER A GIVEN TRACTIVE STRESS. IN SERIES II, THE SAMPLES WERE PREPARED AT VARYING DENSITIES AND MOISTURE CONTENTS. MOLDING THE SAMPLES AT HIGH MOISTURE CONTENTS PRODUCED SMOOTHER SAMPLES; THUS, IT APPEARED THAT DECREASING SURFACE ROUGHNESS WAS MORE IMPORTANT THAN INCREASING DENSITY. WHEN THE TEMPERATURE OF THE WATER FLOW WAS VARIED IN SERIES III, IT WAS OBSERVED THAT THE RATE OF EROSION INCREASED SIGNIFICANTLY WITH INCREASING TEMPERATURE. IT WAS CONCLUDED THAT EROSION RATES ARE DEPENDENT ON SOIL COMPOSITION, SURFACE ROUGHNESS, FLOW RATE, TEMPERATURE, AND DURATION OF FLOW. /AUTHOR/

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  • Authors:
    • Christensen, Richard W
    • Das P.E., F.AS, Braja M.
  • Conference:
  • Publication Date: 1973

Media Info

  • Media Type: Digital/other
  • Features: Figures; References; Tables;
  • Pagination: pp 8-19
  • Monograph Title: SOIL EROSION: CAUSES AND MECHANISMS: PREVENTION AND CONTROL
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00236630
  • Record Type: Publication
  • Files: TRIS, TRB, ATRI
  • Created Date: Jun 25 1973 12:00AM