Mapping of risk areas is an important tool to help public bodies in the adoption of disaster prevention measures The work is under the responsibility of the federal government which works together with city halls the Public Ministry and the Civil Defense
The work began in 2011 after the disaster in the Serrana region of Rio de Janeiro which left 918 dead in Petropolis and Friburgo The intention is to monitor risk areas create warning systems and support public policy decisions
Geologist Julio Lana emphasizes that the ideal is for the areas to be monitored periodically because the dynamics of cities change a lot The municipality has to know that mapping is not the responsibility of the federal government alone It is necessary to integrate the state government and city halls and seek partnerships.
The number of risk areas does not decrease because the cities continue to grow in an intense and disorderly way While acting in one area others emerge
The areas that will be the object of study are defined a year in advance The selection criteria are indication from the Ministry request from cities or requests from the Public Ministry and Civil Defense
The targets of these municipalities are listed in partnership with the city hall and those with the highest risk are prioritized At the site the teams observe signs of landslides the condition of buildings and the soil deformations cracks whether there is a history of tragedies and whether it is in the bed of rivers and streams
Risk areas are those that show signs in the face of a geological event of causing loss of life and damage of an economic nature defines the geologist.