Landslide Susceptibility in the Community Neighborhood Road, the National University of Loja to 0.9 Km Stretch, the city, Canton, and Province of Loja.
F. González1, W. Tambo2, M. Valarezo3, l. González4, J. Romero5, J.Benavides6
1Fermin Alexander González Sisalima, Department of environmental geology and land use, University National of Loja, Loja, Ecuador.
2Walter Simón Tambo Encalada, Department of environmental geology and land use, University National of Loja, Loja, Ecuador.
3Jorge Michael Valarezo, Geology and mines, University National of Loja, Loja, Ecuador.
4Luis González, Department of Environmental Geology and land use, University National of Loja, Loja, Ecuador.
5Julio Romero Sigcho, Department of environmental geology and land use, University National of Loja, Loja, Ecuador.
6José L. Benavides M, Electromechanical, University National of Loja, Loja, Ecuador.
Manuscript received on 15 April 2016 | Revised Manuscript received on 25 April 2016 | Manuscript Published on 30 April 2016 | PP: 62-70 | Volume-5 Issue-4, April 2016 | Retrieval Number: D4487045416/16©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: This article has as the main purpose to identify landslide prone areas in the Community Neighborhood Road, in the section between the Julio Ordoñez Urbanization and the National University of Loja in about 0.9 kilometers in Loja city-Ecuador. The implementation needed to develop in two phases of field and office: the first was to use specialized equipment to carry out the survey of the topography, geology, land use, geomorphology and geotechnical investigation directly scan standard penetration tests (SPT), and indirectly with vertical electrical sounding (SEV). This information after being analyzed entered into software (ArcGIS 10.1. Ilwis 3.06 and ArcView 3.2) and then perform modeling using susceptibility calculation methods to landslides. The methods utilized in this investigation for determining susceptibility are, deterministic based on the computation of safety factor (FS) and heuristic method with the combination of factors maps whose weights assigned according to the knowledge of the actual conditions of the sector which obtained from the SEV, SPT, and bibliographic sources. The heuristic method was systematized in ArcGIS 10.1 software by applying the model tool builder for combining raster maps using the tool weighted sum, through the assignment of values to each of the variables that are: Geology 0.4, slope 0.3, geomorphology 0.2 and vegetation cover 0.1. In contrast, to the deterministic method, a digital terrain model (DTM) in Ilwis software was developed, after calibrated and modeled in ArcGIS 10.1 software, being the most relevant parameters angle of internal friction and soil cohesion. Moreover, an inventory of landslides was performed, which were located within the area of high susceptibility to match the physical-mechanical characteristics of the soil resulting from SPT and SEV analysis.
Keywords: Sensitivity, SPT Standard Penetration Test, Vertical Electrical Sounding SEV, Deterministic, Heuristic, Model Builder, Weighted Sum, DTM.
Scope of the Article: Community Information Systems