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University of Southern California April 2011 University of Southern California April, 2011 University of Southern California s s as o a all cl va 7 c ev 87 Ze 58 of existing roadway between USC Wrigley Institute and Two Harbors Z 5 of existing roadway between USC Wrigley Institute and Two Harbors . G of existing roadway between USC Wrigley Institute and Two Harbors M OG At Catalina Island CA M O At Catalina Island CA o EO At Catalina Island, CA. d GE n G u – Introduction Hypothesis m m – Introduction Hypothesis dm m Ed am I d t ti l l d lid l i GIS i i t t E ra A Landslide is a Mass movements under In regard to spatial landslide analysis, GIS is an important y: g A Landslide is a Mass movements under t l t t d t i t h dli i li ti by o influences of gravity occur as a result of tool to carry out data input, handling, visualization, b Pr influences of gravity occur as a result of bi ti l i d P diverse disturbing and destabilizing combination, query, analysis. ed S diverse disturbing and destabilizing nte IS processes en G processes. se G Th t bilit f l i dt i db es c. The stability of slopes is determined by re Sc th t f f d li Pr .S the geometry of surfaces and slip- P M. h i M horizons. Research Area Research Area Methods Methods C t li Il di k il d ff th t f th US tt f C lif i • Catalina Island is a rocky island off the coast of the U.S. state of California, Catalina Island is a rocky island off the coast of the U.S. state of California , l td b t 22 il (35 k ) th th t f L A l C lif i located about 22 miles (35 km) south-southwest of Los Angeles, California. A method of collection data has located about 22 miles (35 km) south southwest of Los Angeles, California . - A method of collection data has • This is an analysis of landslide in an specific area of the Catalina Island been applied through three step: • This is an analysis of landslide in an specific area of the Catalina Island. been applied through three step: Study Area is located in the north west part (section third) of the island 1 L d lid i t • Study Area is located in the north west part (section, third) of the island 1.- Landslides inventory • In the East-West existing roadway between the USC Wrigley Institute facility and mapping In the East West existing roadway between the USC Wrigley Institute facility and mapping. and the town of Two Harbors 2 Preparation of terrain and the town of Two Harbors. 2.- Preparation of terrain parameter maps parameter maps. 3 Analysis of the relation 3.- Analysis of the relation Research Aims bt l d lid di t ib ti Research Aims between landslide distribution This research follows a spatially distributed and terrain parameter maps This research follows a spatially-distributed and terrain parameter maps. data with a geo reference to real world Landslide inventory have data with a geo-reference to real world. -Landslide inventory have conducted from internal data base conducted from internal data base and fieldwork and fieldwork. All the information concerning the -All the information concerning the type length and width of landslides type, length and width of landslides bodies is entered in the database GIS Analysis of landslides and terrain parameters bodies is entered in the database GIS Analysis of landslides and terrain parameters Conclusion Conclusion This research shows that in the area of -This research shows that in the area of the analysis there are two types of the analysis there are two types of landslides: landslides: 1 l h fl hil d lid 1. - slow earth flow their landslide 1. slow earth flow their landslide it ll masses are quite small. 2 rock falls occur in limestone 2. - rock falls occur in limestone formations formations -Since the slides has occurred at the Since the slides has occurred at the i dh h t t upper regions and hence short-term upper regions and hence short term di ti ill b i di t remediation will be an immediate solution in the form of relief wells solution in the form of relief wells.
