r.shalstab
A model for shallow landslide susceptibility.
r.shalstab dem=name phy=name c_soil=name gamma=name z=name k=name [root=name] susceptibility=susceptibility critic_rain=critical rain [--overwrite] [--verbose] [--quiet] [--qq] [--ui]
Example:
r.shalstab dem=name phy=name c_soil=name gamma=name z=name k=name susceptibility=susceptibility critic_rain=critical rain
grass.script.run_command("r.shalstab", dem, phy, c_soil, gamma, z, k, root=None, susceptibility, critic_rain, overwrite=False, verbose=False, quiet=False, superquiet=False)
Example:
gs.run_command("r.shalstab", dem="name", phy="name", c_soil="name", gamma="name", z="name", k="name", susceptibility="susceptibility", critic_rain="critical rain")
Parameters
dem=name [required]
Name of input elevation raster map
phy=name [required]
Soil friction angle (angle)
c_soil=name [required]
Soil cohesion (N/m^2)
gamma=name [required]
Soil density(Kg/m^3)
z=name [required]
Vertical thickness of soil (m)
k=name [required]
hydraulic conductivity (m/h)
root=name
Root cohesion k (N/m^2)
susceptibility=susceptibility [required]
Name for output landslide susceptibility map (from 1 to 7)
critic_rain=critical rain [required]
Name for output critical rainfall map (mm/day)
--overwrite
Allow output files to overwrite existing files
--help
Print usage summary
--verbose
Verbose module output
--quiet
Quiet module output
--qq
Very quiet module output
--ui
Force launching GUI dialog
dem : str, required
Name of input elevation raster map
Used as: input, raster, name
phy : str, required
Soil friction angle (angle)
Used as: input, raster, name
c_soil : str, required
Soil cohesion (N/m^2)
Used as: input, raster, name
gamma : str, required
Soil density(Kg/m^3)
Used as: input, raster, name
z : str, required
Vertical thickness of soil (m)
Used as: input, raster, name
k : str, required
hydraulic conductivity (m/h)
Used as: input, raster, name
root : str, optional
Root cohesion k (N/m^2)
Used as: input, raster, name
susceptibility : str, required
Name for output landslide susceptibility map (from 1 to 7)
Used as: output, raster, susceptibility
critic_rain : str, required
Name for output critical rainfall map (mm/day)
Used as: output, raster, critical rain
overwrite: bool, optional
Allow output files to overwrite existing files
Default: False
verbose: bool, optional
Verbose module output
Default: False
quiet: bool, optional
Quiet module output
Default: False
superquiet: bool, optional
Very quiet module output
Default: False
DESCRIPTION
r.shalstab allows to apply the algorithm developed by Montgomery and Dietrich (1994) in GRASS GIS. According to these authors, the models associate the theories of infinite slope, where the strength of soil share at the discretion of rupture of Mohr Coulomb, with the hydrological model O'Loughlin (1986), resulting in equation. Requested input and output.
The command requires some input:
- DEM a digital terrain model of the study area;
- Raster map or single value for soil cohesion (N/m^2);
- Raster map or single value for soil friction angle (°);
- Raster map or single value for soil density (kg/m^3);
- Raster map or single value for vertical thickness of soil (m);
- Raster map or single value for hydraulic conductivity k (m/h);
- Raster map or single value for root cohesion (N/m^2); (default = 0)
- Raster map or single value for wet soil density (kg/m^3). (default = 2100)
The outputs are: A landslide susceptibility map (value range from 1 to 7):
- 1 Unconditionally Unstable
- 2 0-30 mm/day
- 3 31-100 mm/day
- 4 101-150 mm/day
- 5 151-200 mm/day
- 6 201-999 mm/day
- 7 Stable
A map for of critical rainfall map (mm/day).
REFERENCES
Montgomery, D. R. and Dietrich, W. E.: A physically based model for the topographic control of shallow landsliding,Water Resour. Res., 30, 1153-1171, 1994.
AUTHORS
Andrea Filipello, University of Turin, Italy
Daniele Strigaro, University of Milan, Italy
SOURCE CODE
Available at: r.shalstab source code
(history)
Latest change: Friday Feb 21 10:10:05 2025 in commit 7d78fe3