Revisión de la aplicación de la metodología de la amenaza relativa a movimientos en masa del SGC a escala 1:100.000 en la plancha 118-San Francisco.

Abstract

The central objective of this work involved investigating the attributes, variables, parameters and weights most effective in achieving a better zoning susceptibility and threat mass movement through a bibliographic review of other methodologies and expert consultation. Starting from the results obtained in developing the map Zoning Susceptibility and Threat mass movement of the plate 118 - San Francisco conducted by the University of Pamplona and Colombian Geological Service (SGC) in 2015, which was strictly applied methodological document developed by the SGC in 2013, subsequently an analysis that allowed comparison of the results obtained in this work, with those obtained with the application of the methodology of the SGC. Changes were made to the variables geology, geomorphology and soil soils. In the first variable incorporated new attributes namely, which they are linear geological structures and weathering; in the second variable comprises the morphogenetic attributes, morphodynamics and morphometry, in the first attribute rating adjustments were made attribute modeling, according to expert criteria regarding prone geoformas to generate mass movements; in the second attribute suppressed the Relaincli component, which was replaced by the component density mass movements. And finally in the Variable edaphic soils, use the proposed model Rosas in 2014, in is incorporated the cation exchange capacity (CIC) in qualifying the type of clay. The attributes of vegetation cover and slope, and taxonomy attributes and natural drainage are deleted. It was observed that the result of susceptibility modeling and threatens mass movement present a better correlation between mass movements and high categories also better discrimination in the areas of zoning.