STUDY OF FLOODING IN THE CITY OF SAN GABRIEL, RS

Abstract

This study aims to analyze the flood events in the city of São Gabriel. First, we created an inventory of the processes associated with the flooding in the city, was conducted between 1980 and 2009. This information formed the basis for identifying the temporal and spatial behavior of the floods that affected the urban area of São Gabriel in the period studied. The analysis tried to correlate rainfall data from rain gauge stations in the county with a data quota fluviometric station in Vacacaí river. The hydrologic data related to altimetry Vacacaí the river and rainfall that hit the city during the flood events were collected in the HIDROWEB site (http://hidroweb.ana.gov.br/) of the National Water Agency (ANA) . From these analyzes there were significant events, such as the event that occurred in May 1984 when the river reached 502 cm Vacacaí. With this, it is known to lower elevation at which an event is confirmed. Another important event is held in November 1990, which shows the most significant within the historic flooding of the city by presenting one of the highest quotas rising waters of the river Vacacaí, and this reached 810 cm.