– soft - 01
displayed in Surfer program. In grayed the source pixel with black =0°
and white for 360° (note that the contouring introduce artifacts).
The contours indicate the number of contribution cones (yellow-red gradient).
collaboration with LMR in EPFL
CONEFALL is designed to estimate roughly the potential rock falls prone
related to this program can be found in many different articles (Evans
and Hungr, 1993, Toppe, 1984). The basics are described in an article:
CONEFALL: CONEFALL: a program for the quick preliminary estimation of
the rock-fall potential of propagation zones (Jaboyedoff and Labiouse,
The principle of the program is rather simple. A block can propagate
if the slope is sufficiently steep. Physically consider that if the
slope is steeper than a limit jp, then the block accelerates. If it
is lower, it decelerates. Using the previous assumption, a block can
propagate from its source to the point of intersection of the topography
with line starting from the source point making an angle jp with horizontal.
The space where a block can propagate from a grid point is located within
a cone of slope jp with a summit placed at the source point (Fig. 1.1).
This procedure is applied to all source points.
The source points can either be considered as the entire cliffs, the
border of the cliff or its bottom. Using simple consideration it can
be shown that the mean velocity of blocks is given a function of the
difference in altitude Dh between the cone and the topography. Dh is
proportional to the kinetic energy that may be acquired by the block
during the fall.
Note that CONEFALL can be used to roughly define the potential propagation
zone for a landslide.
window of the program, containing the five types of windows
Written by Quanterra
as subcontractor for the CREALP
Available on: www.crealp.ch
program MATTEROCKING 2.0 is designed to estimate the average number
of discontinuities on digitized topographic relief. This software is
used for potential rock slope instabilities detection.
can be found elsewhere in articles (Jaboyedoff et al., 1996; Rouiller
et al., 1997; Jaboyedoff et al., 1999, Baillifard et al., 2001).
Using digital elevation model (DTM), the program Matterocking permits
to compare structural data with topographic surface orientation in order
to estimate the average number of discontinuities intersecting a topographic
relief. Locations where rock-instabilities can occur by discontinuities
or wedges that allow sliding can be spotted. Different functions are
implemented such as estimates of potential sliding areas, surface number,
and linear number of discontinuities within cell of the DTM.
Matterocking is designed to calculate and not to generate graphic outputs.
Nevertheless, some visualization utilities exist to have a quick view
of the results. The file format are chosen in order to be used in to
standard visualization program: Surfer Golden software© and ArcView
Designed by M.
Jaboyedoff as subcontractor for the CREALP
Written by J.-Y.
Delèze at CREALP
is MatterCliff ?
is an interactive and simple to use tool for the characterization of
discontinuities and the analysis of rock slopes stability. This software
aims at the implementation of various geotechnical, statistical and
probabistic methods in a multiple-document application comprising five
major parts :
statistical study of spatial distribution of discontinuity family using
spacing histograms and variographic analysis
2. the semi-automatic digitization of discontinuities from scanned images
or outcrop sketches
3. the analysis of simple probabilistic models
4. an utility for the pre-analysis of orientation data : angle conversions,
coordinates calculations, intersection of planes
5. a tool for the computation of the volume generated by 2 or 3 families
to estimate the smectite content and number of consecutive illite layers
in mixed-layer illite-smectite using illite crystallinity data
– soft - 02
of TOP3D display.
topographic analysis computer program.
COLTOP-3D can be used to analyze the structures, especially faults,
shaping the morphology.
Maps as well as stereonets displaying colors depending on the orientation
will be implemented. Histograms of topographic surface are planned.
The design of tools useful to analyze topography in a structural way
is planned. Faults tracing will be implemented based on orientation
and surface points.
A 1D thermal
modeling with water inflow