Landslide and flood risk mapping in marginal road areas in São Paulo Metropolitan Region

ABSTRACT:

The objective of this paper was develop a landslide and flood risk map to areas located close to an important road in São Paulo state. Thus, the second objective was present geotechnical measures to mitigate the mapped processes. The risk areas were mapped from fieldwork and classified into four risk levels (R1: low; R2: medium; R3: high or; R4: very high) using registration forms that include natural constraints, anthropogenic processes and instability evidences. There were identified eight landslide risk areas (five were classified as a R2 risk, two were classified as a R3 risk and one were classified as a R4 risk) and one flood risk classified as a R3 risk. This paper can help monitoring the environmental impacts that may occur after the road construction, especially in the emergence of irregular settlements in unsuitable areas.

Keywords:
Metropolitan beltway; highway environment impacts; risk assessment; landslides; floods