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Download steep hillside for free8/21/2023 Geological Survey Scientific Investigations Report 2007-5092, 54 p. Brien, D.L., and Reid, M.E., 2007, Modeling 3-D slope stability of coastal bluffs using 3-D ground-water flow, southwestern Seattle, Washington: U.S.and Brien, D.L., 2006, Assessing massive flank collapse at stratovolcanoes using 3-D slope stability analysis, In Evans, S.G., Scarascia Mugnozza, G., Strom, A., and Hermanns, R.L., eds., Landslides from Massive Rock Slope Failure, NATO Science Series, v. Geological Survey Open-File Report 01-468, 18 p., 3 plates. 2004, Lahar hazards at Casita and San Cristobal Volcanoes, Nicaragua: U.S. Vallance, J.W., Schilling, S.P., Devoli, G., Reid, M.E., Howell, M.M., and Brien, D.L.L., 2001, Volcano collapse promoted by hydrothermal alteration and edifice shape, Mount Rainier, Washington: Geology, v.29, n.9, p. Reid, M.E., Christian, S.B., and Brien, D.L., 2000, Gravitational stability of three-dimensional stratovolcano edifices: Journal of Geophysical Research, B, Solid Earth and Planets, v.Scoops3D Fortran source code (updated to v1.3.01 on May 15, 2023).Scoops3D examples described in Chapter 7 of the Scoops3D manualĬompiled code for Scoops3D for use at command line.Windows install package (updated to v1.3.01 on May 15, 2023)ĭownload individual components of Scoops3D package.3D variably saturated pressure heads or pore pressures, including the effects of unsaturated suction stressesĭownload complete installation package including software and documentation (recommended).Įasy-to-install software packages for Windows or Macintosh operating systems, includes Scoops3D, Scoops3D-i, and Scoops3D manual:.Pore pressure effects with piezometric surfaces or full 3D distributions of pore pressures or pressure heads.Subsurface material layers or full 3D distribution of material properties.Easy integration of input/output files with Geographical Information System (GIS) software.Simple graphical user interface (Scoops3D-i).The user's manual includes: the theoretical basis for the slope-stability analysis, requirements for constructing a 3D domain, a detailed operational guide and input/output file specifications, practical considerations for conducting an analysis, results of verification tests, and multiple examples illustrating the capabilities of Scoops3D. It provides the least-stable potential landslide for each DEM cell in the landscape, as well the associated volumes and (or) areas. For each potential landslide, Scoops3D assesses the stability of a rotational, spherical slip surface encompassing many DEM cells. The program uses a three-dimensional (3D) method of columns limit-equilibrium analysis to assess the stability of many potential landslides (typically millions) within a user-defined size range. Scoops3D evaluates slope stability throughout a digital landscape represented by a digital elevation model (DEM). (From Scoops3D user’s manual.) (Public domain.) A typical application is a rock-lined chute (EM 1601 section 3.7 (e)).Model of 3D slope stability of a volcano edifice computed using Scoops3D software. For steep slopes ranging from 2 to 20 percent where unit discharge is low, EM 1601 presents a separate design process that is not included in the riprap calculator. As the Froude number approaches 1.0 (critical depth), the user should strongly consider alternative methods. For installations immediately downstream of concrete channels, a vertical velocity distribution coefficient of 1.25 (an option in the calculator) should be used due to the difference in velocity profile over the two surfaces.īoth the EM 1601 riprap computation and HEC-RAS model application are suitable for shallow slopes with gradually varied flow. In expanding transitions, flow can concentrate on one side of the expansion and design velocities should be increased. In areas where flow changes from tranquil to rapid and then back to tranquil, riprap sizing methods applicable to hydraulic structures (HDC 712-1) should be used. The procedures in this calculator are applicable to gradual transitions where flow remains tranquil. Transitions in size or shape may also require riprap protection. The EM 1601 design guidance applies to riprap design for open channels not immediately downstream of stilling basins or other highly turbulent areas (for stilling basin riprap, use HDC 712-1, EM 1601 Plates 29 and 30).
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