SAGA.ta_slope_stability.2: SHALSTAB
<br/>This tool is a realization of the SHALSTAB (Shallow Slope Stability) model from Montgomery & Dietrich (1994). The model computes grid cell critical shallow groundwater recharge values (CR in mm/day) as a measure for relative shallow slope stability, utilizing a simple model that combines a steady-state hydrologic model (a topographic wetness index) to predict groundwater pressures with an infinite slope stability model. For computation, a slope (in radians) and a catchment area (in m2) grid are required. Additionally, information on material density (g/cm3), material friction angle (°), material hydraulic conductivity (m/hr), bulk cohesion (MPa) and depth to potential shear plane (m) are required that can be specified either globally or through grids. The tool produces a continuous CR (mm/day) raster with unconditionally stable cells blanked, and unconditionally unstable cells as CR = 0. Optionally, a classified CR grid can be calculated representing seven stability classes.<br/><br/>Reference: <a href="http://www.agu.org/pubs/crossref/1994/93WR02979.shtml">Montgomery D. R., Dietrich, W. E. (1994) A physically based model for the topographic control on shallow landsliding. Water Resources Research, 30, 1153-1171.</a>.<br/>
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Optionally, a classified CR grid can be calculated representing seven stability classes.<br/><br/>Reference: <a href=\"http://www.agu.org/pubs/crossref/1994/93WR02979.shtml\">Montgomery D. R., Dietrich, W. E. (1994) A physically based model for the topographic control on shallow landsliding. 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maximum bulk cohesion (MPa)", "description": "Constant value if no raster set", "schema": {"type": "number", "default": 0, "format": "double", "nullable": true}, "id": "fJmax"}, "fK": {"title": "Parameter sampling runs", "description": "Number of sampling cycles", "schema": {"type": "integer", "default": 1, "nullable": true}, "id": "fK"}}, "outputs": {"G": {"title": "CR values", "description": "Resulting critical recharge (m/day) grid", "extended-schema": {"oneOf": [{"allOf": [{"$ref": "http://zoo-project.org/dl/link.json"}, {"type": "object", "properties": {"type": {"enum": ["image/tiff", "application/x-ogc-envi", "application/x-ogc-aaigrid", "image/png"]}}}]}, {"type": "object", "required": ["value"], "properties": {"value": {"oneOf": [{"type": "string", "contentEncoding": "base64", "contentMediaType": "image/tiff"}, {"type": "string", "contentEncoding": "base64", "contentMediaType": "application/x-ogc-envi"}, {"type": "string", "contentEncoding": "base64", "contentMediaType": 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Last modified: Sat Feb 19 15:43:34 CET 2022