The root-soil system is above the failure plane and consequently The colluvium probably had cohesion of less That occurred during the 1995 storm in Madison County, Virginia. Suggested similar soil and hydrologic properties for triggering the landslides Parameters, so it is the preferred model to evaluate slope stability over Rainfall-rate distributions, LISA allows the use of distributed data for all SINMAP that only considers soil cohesion, internal friction angle and The stability calculation used in SINMAP and LISA is similarĪnd utilizes probability distribution functions for certain parameters. On a regional scale in areas prone to rain-induced landslides as it considersīoth the transient and spatial response of pore pressure in its calculation of Would be the preferred method of the three models to evaluate landslide hazards Iverson's transient response model evaluated stability conditions as a function Iverson's (2000) transient response model for slope stability analysis byĪpplying each model to the landslide data from Madison County. This paper evaluated and compared the approaches of SINMAP, LISA, and On slopes from 17 o to 41 o ( Wieczorek et al., 2000). Of these debris flows initiated with a thickness of 0.5 to 3.0 m in colluvium Field studies showed that the majority (70%) Rain fell within a sixteen-hour period, initiating floods and over 600 debrisįlows in a small area (130 km 2) of Madison County, Virginia.
Geological Survey, Reston VAĭuring the rainstorm of June 27, 1995, roughly 330-750 mm of Names in this publication is for descriptive purposes only and does not implyĮndorsement by the U.S. Standards nor with the North American Stratigraphic Code. Has not been reviewed for conformity with U.S. Predicting Debris Flows in Madison County, Virginia By Meghan A Comparative Analysis of Hazard Models for
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