PORE AND ERODING FLUID INFLUENCES ON SURFACE EROSION OF SOIL

The observation is made that the normal scatter of the authors test results allows considerable room for interpretation, and further comments are made on the data presented in the figures. The reported results conflict with the pinhole test experience in one respect. Experience indicates that soil such as that with SAR=1.4 will suffer no erosion at 10 fps, as proven by long-time tests without erosion. The head loss is roughly 30 in. of water per inch of pinhole length with fluid shear stress on the soil roughly 600 dynes/sq. cm. (pressure drop divided by the peripheral hole area). In the author's tests soil erodes at velocities well below 10 fps and shear stresses below 50 dynes/sq. cm. Probably the difference results from the different geometrics of the eroding clay surfaces. Greatly different shear drag and velocities are needed in the 2 tests for erosion.

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  • Accession Number: 00130623
  • Record Type: Publication
  • Report/Paper Numbers: ASCE #11743 Proceeding
  • Files: TRIS
  • Created Date: Apr 7 1976 12:00AM