Reported here is research using hydraulic modeling which has advanced the ability to predict the nature and behavior of waves created when a large mass of earth and rock slides rapidly downward into a lake or reservoir. The 3-dimensional model (area 2,300 square feet) recreated in miniature the dam and the reservoir topography (of a construction project in Montana) for about 1 mile upstream and 1,200 ft downstream from the dam. Slides from 4 possible landslide locations upstream of the dam were reproduced by sliding scaled landslide masses. Wave data were measured at various locations over the reservoir to determine the magnitude of wave heights, runup, overtopping and wave pressures on the powerhouse if overtopping of the dam occurred for the expected landslides. Model tests pointed out the wave heights and runup to be expected various reservoir pool elevations. Remedial plans proposed for reducing possible landslide volumes and velocities were checked on the model to see if corrective measures would lower the wave heights desired. Details of the tests are outlined. The model also contributed to general knowledge on landslides.

  • Corporate Authors:

    Engineering Research and Development Laboratory

    98 East Main Street
    Rockville, CT  United States  06066
  • Publication Date: 1973-9

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Filing Info

  • Accession Number: 00262155
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 22 1974 12:00AM