a Landslide Analysis at Catalina Island, California. as part of a Graduate class in a GIST Master's degree program at University of Southern California. The stability of slopes is determined by the geometry of surfaces and slip-horizons.

1. April,
April, 2011
p University of Southern California
M.Sc GIS Program – GEOG 587 class
Presen ed by Edmundo M. Zeva os
am GEOG 587 c a
Zevall
of existing roadway between USC Wrigley Institute and Two Harbors
At Catalina Island CA
Island, CA.
O
Introduction
t oduct o Hypothesis
ypot es s
Presented by: Edm
A Landslide is a Mass movements under In g d t
I regard to spatial l d lid analysis, GIS i an i p t t
p ti l landslide ly i , is important
influences of gravity occur as a result of tool t
t l to carry out data input, handling, visualization,
y t d t i p t, h dli g, i li ti ,
combination, query, analysis.
bi ti , q y, ly i
M.Sc. S P
diverse disturbing and destabilizing
processes.
processes
The stability of slopes is d t
The stab ty of slopes is dete i ed by
t bilit determined b
d
t
the geometry of su faces a d slip-
the geo et y of surfaces and slip
t
horizons.
ho i o s
Research Area
Methods
et ods
• C t li I l d is a rocky i l d off the coast of the U S state of C lif i
Catalina Island i k island ff th t f th U.S. t t f California,
located about 22 miles (35 km) south-southwest of L Angeles, California.
l t d b t il k ) south southwest f Los A
th th t l C lif i - A method of collection data has
• This is an analysis of landslide in an specific area of the Catalina Island
Island. been applied through three step:
• Study Area is located in the north west part (section, third) of the island
y p ( (section, ) 1.- Landslides i e t y
1 La d lid inventory
ds des to
• In the East-West existing roadway between the USC Wrigley Institute facility
East West and mapping
mapping.
and the town of Two Harbors
Harbors. 2.-
2 Preparation of terrain
p
parameter maps
maps.
3.-
3 Analysis of the relation
Research Aims bet
between la dslid dist ib tio
b t ee landslide distribution
d de d t but
This research follows a spatially-distributed
spatially distributed and terrain parameter maps
maps.
data with a geo reference to real world
geo-reference world. -Landslide inventory have
Landslide y
conducted from internal data base
and fieldwork
fieldwork.
-All the information concerning the
All
type,
type length and width of landslides
bodies is entered in the database
G S a ys s o a ds des a d te a pa a ete s
GIS Analysis of landslides and terrain parameters
Co c us o
Conclusion
-This research shows that in the area of
This
the analysis there are two types of
landslides:
1. l h fl  h i landslide
1 - slow earth flow their l d lid
masses are quite small.
q it ll
2.
2 - rock falls occur in limestone
formations
-Since the slides has occurred at the
Since
upper regions and hence short-term
i dh short t
h t term
remediation will be an immediate
di ti ill b i di t
solution in the form of relief wells
wells.