Caracterização das áreas de inundação urbana no Município de São Carlos – SC

Abstract

Natural disasters arising from urban flooding become increasingly frequent and worrying for the population. The municipality of São Carlos - SC suffers afterwards with flood events caused by Lajeado Morais. In the years of 1998, 2014 and 2015 floods of the municipality happened that still is remembered by the population. The aim of this work is to characterize the urban flood areas caused by Lajeado Moraes in the municipality. The return period was estimated from the historical serie of maximum daily precipitation. The flood stages were raised on the field with the help of local residents. The APIs for each event were obtained through the historical series. Flood spots were created from flood stages in ArcGIS. The precipitation maximum daily for the years 2014 and 2015 was 138.5 and 140.7 mm, and the minimum flood stages obtained were 255.41 and 255.25 m and the return period were 8 and 9 years, respectively. Therefore, for a return period equal or bigger 8 years the probability of flood events in the municipality is high, being able to reach a flood stage above 255.25 m.