Análise e hierarquização de barragens usando Matriz GUT como ferramenta de análise de risco no contexto da política nacional de segurança de barragens

Abstract

In the present work we tried to evaluate the application of the GUT (Severity-Urgency-Trend) Matrix tool in the analysis of dam safety and dam hierarchization for the purpose of prioritizing inspection actions from the perspective of the enforcement agency. The tool has proved to be easy to apply to assess dam safety and can be applied to a dam individually or to a set of dams. The results obtained allowed to infer that the methodology can be applied by the enforcement agencies to guide the activities of dam inspection so that a prioritization of the dams to be inspected can be obtained within an established planning of actions. The methodology can also be easily adapted for dam owners who have a large number of dams that can also apply the tool with a view to prioritize the application of facilities maintenance features or even their dam safety inspection actions. It was verified that the good results in the application of the tool depend essentially on a good and adequate evaluation of the anomalies and the experience of the professional of who uses it. Differently from the risk category classification methodology established by the CNRH, where the results depend on the technical characteristics, conservation status and dam safety plan (PSB), the methodology applied in the present research does not depend on the stage of implementation of the PSB or project documentation.