J. Graham’s scientific contributions

... Models for shallow-landslides (Table 1, Eq. 1,2) consider an infinite slope with unlimited extent which has constant conditions and constant soil properties at any given distance below the surface of the slope and assumes all forces are normal or parallel to the slope (Taylor 1948, Graham 1984, while water infiltration and groundwater flow patterns are modeled based on one-dimensional infiltration by the transient rainfall influence represented by pressure head distribution (Iverson 2000) and the product between the soil thickness and water density respectively, representing the increasing pressure heads or a rising groundwater table (Zhang et al. 2016). Those models have been applied in statical software such as Infinite Slope 3.0 (Infinite Slopes Project 2020), PI-SA-m (Haneberg 2007) and extended to GIS application in the work of Escobar-Wolf et al. (2021); the infinite model is also developed to spatially distributed modeling in large areas (Zhang et al. 2016) by the Transient Rainfall Infiltration and Grid-Based Regional Slope-Stability (TRIGRS) software (Baum et al. 2002, Weidner 2018, SINMAP (Pack et al. 1998) applied in the novel work of Lin et al. (2021) and Shallow Slope Stability Model (SHALSTAB) (Dietrich et al. 1993) used in mountainous Colombian Andes by Aristizabal et al. (2015), and Shallow Landslides Instability Prediction (SLIP) (Montrasio and Valentino 2008) used by Marin et al. (2021) in a Colombian Andean catchment. ...

Reference:

Assessing debris flow susceptibility using triggering and propagation models, a case study in the tropical region of the northern Andes in Colombia