Análisis de los factores hidrológicos y geomorfológicos asociados a la amenaza por movimiento en masa para la zona de estudio comprendida entre los municipios de Campoalegre y Pitalito, Huila

Abstract

The Colombian territory has a relief of high slopes, also for the most part presents an unstable geomorphology, therefore, the high rainfall combined with the two factors mentioned above generate mass movements, Therefore, the analysis of threats becomes important because it will allow the identification of vulnerable or high-risk areas in order to counter them. In the municipalities of Campoalegre and Pitalito (Huila), throughout history there have been a total of 74 landslides with records dating from 1942, which have affected more than 2740 people (SGC, 2015).

For this reason, this degree project is focused on analyzing the hydrological and geomorphological factors associated with mass movements, for which the methods of numerical curves (NC) developed by the Soil Conservation Service (SCS) were used of the United States, which allows estimating the effective precipitation or surface runoff, allowing to identify the conditions of infiltration of the soil. For this methodology the parameters of rain, vegetation cover and soil type are evaluated.

On the other hand, the Mora - Vahrson method was used, which allows the classification of susceptibility to mass movements, evaluating parameters such as lithology, terrain slopes, seismicity and rain. Finally, the threat model of the study basin will be generated by combining these two methods.