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Geoenvironmental Disasters

Table 1 Summary of input data used in the GIS-TRIGRS model

From: GIS-based modeling of snowmelt-induced landslide susceptibility of sensitive marine clays

Data typep

Collected data

Range of values

Geotechnical Dataa

c΄ kPa

ϕ′ Degree

Unit Weight kN/m3

θs

θr

Ks ×  10−7 m/s

DѰ × 10 − 6 m/s2

α

12–20

21–30

14–22

0.2–0.9

0.02–0.34

0.01–1

0.0005–4

(− 0.5) – (− 3.2)

Climate Datab

Snowmelt Intensity (mm/s)

Snowmelt Duration (s)

see Fig. 4

Hydrogeological Datac

Initial Groundwater Table (for 474 water wells/boreholes)

(0.2–3.5) m

Spatial Datad

Slope δ (Degree)

Failure Depth (m)

0–33

2.1–7.7

  1. c΄: effective cohesion, ϕ′: effective internal friction, θs: volumetric water content at saturation, θr: residual water content, Ks: saturated hydraulic conductivity, DѰ: soil water diffusivity α: inverted capillary fringe
  2. aGeotechnical reports issued by Inspec-Sol Inc. Engineering Solution 2014; Kollaard Associates Engineers 2013; Houlechevrier Engineering Geotechnical Ltd 2013; Trow Associates Inc. 2010;Stantec Consulting Ltd. 2010; Golder Associates Ltd. 2008
  3. bEnvironment Canada
  4. cProvincial Groundwater Monitoring Network (PGMN) Program
  5. dNatural Resources Canada
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