The Analysis of Vulnerability to Landslides in Order to Determine the Risk on Farmland. Case Study: Intercommunity Association Area for Development Alba Iulia

Nicolaie Moldovan, Ioan Păcurar, Ștefan Bilașco, Sanda Roșca, Amalia Ioana Boț

Abstract


Landslides, as geomorphological processes, have a major impact on land use, degree of stability for transport and residential infrastructure, recently present an encreased dynamics as a result of increased superfluous precipitations and a lack in applying stability measures for susceptible slopes, assessing farmland into a certain degree of risk. Therefore, the first methodological step for this study was to determine the probability of appearing landslides in the area, using the Bivariate Statistical Analysis (BSA), taking into account the influence of each morphometric factor: altitude, gradient, slope orientation, fragmentation depth and density, the average annual temperature, rainfall quantity, flooding and geology. In order to obtain spatial probability of occurrence of landslides, conditional of causative and releasing factors, GIS technology has been used in order to determine in the end the vulnerability of land for its land use classes, based on landslides exposure. The final assessment of this study treats the framing of risk classes, imposed by the probability of appearance landslides based on land use classes at each administrative territorial unit that belongs to the Intercommunity Association for Development Alba Iulia. This measures represent extremely useful base and support for the decisional process of spatial planning, as a result of quantity and quality of the results obtained.


Keywords


land-use, vulnerability, landslide, risk assessment.

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