Abstract
In view of the magnitude of a dam, the damage caused by some failure or rupture causes a great impact, which can result in socioeconomic and environmental losses, and also in loss of human lives. In Brazil, the law nº. 12,334 was approved in 2010, which establishes the National Dams Security Policy and the National Information System on Dam Safety - SNISB, in order to monitor and guarantee the safety of dams. In addition to legislation, it is essential to have tools that assist in the evaluation of the conditions of the structures, and that allow the owner, responsible engineers and oversight agencies to make decisions, in order to avoid or at least minimize the occurrence of failures. One of the tools that can be used is the Safety Index of Dams (ISB), proposed by Zuffo (2005) and modified by Aguiar (2014). The ISB allows a global view of the safety status of the dam, being a useful tool of easy application. However, the ISB was determined considering only technological (or engineering) criteria. Thus, this research aims to propose criteria related to environmental factors that must be considered to evaluate the safety of a dam.
Highlights
Brazil's current dependence on hydroelectric power and the water supply problems that occur during dry seanson make the construction of dams and reservoirs essential
In 2010, the Law no 12,334 established the National Dams Security Policy - PNSB and the National Dams Safety Information System SNISB in order to record information and ensure the safety of dams intended for accumulation of water for any use
The environmental criteria that should be considered when analyzing the safety of a dam were elaborated from the literature and Brazilian legislation
Summary
Brazil's current dependence on hydroelectric power and the water supply problems that occur during dry seanson make the construction of dams and reservoirs essential. Like any engineering work the construction and operation of these structures can have a high associated risk and cause environmental impacts. The Ministry of National Integration created the Dams Safety Manual in 2002 to assist in the construction and rehabilitation of dams. Zuffo (2005) developed the Dams Safety Index (ISB), to assess and monitor the safety conditions of a dams, serving as an auxiliary tool in decisions, Aguiar (2014) modified the index with the purpose of adhere to the ISB the criteria of the current Brazilian legislation. The author considered only technological criteria, linked to engineering, without considering the effects on safety caused by environmental factors. It is important to elaborate environmental criteria for the Environmental Index of Dams Safety (ISBA)
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