Sérgio R. Leite, Ludimila L. Silva & Luiz R. Gomes


Table 2. Compliance with the Normative Obligations of the NDSP[ANEEL, 2024]


The evolution of which shows a strengthening of the safety culture and the search for regulatory compliance. The increase in the number of Special Safety Inspections carried out in 2023 reflects the number of plants impacted by similar severe weather events in September and November. Contributing to this progress are communication campaigns about the obligation to comply with rules and standards, the disclosure of monitoring results with performance indicators and the establishment of a deadline for proof of self-regularization of non-compliant situations.


8. Mitigation Policies and Measures Adopted After the Events Reversing the impacts caused by the storms in Rio Grande do Sul depends on several factors. This is because dam safety is a multidisciplinary process, made up of structural and non-structural activities. After overcoming the critical moments in Rio Grande do Sul, ANEEL initiated and mapped out a series of measures focused on improving inspection and dam safety protocols. These include:


8.1. Review of Dam Safety Plans (DSP) The occurrences recorded indicate that Rio Grande do Sul is about to face more frequent and severe impacts related to flooding in the future. Especially if there is no investment in mitigation and adaptation responses. Dam Safety Plans and Emergency Action Plans should serve as a complementary tool to support decision-making for each alert level defined in risk management. In this sense, the concessionaires operating dams in Rio Grande do Sul were urged to revise their Safety


Plans, considering the implementation of new monitoring and continuous inspection technologies, improved communication processes and data review. Although flood forecasts and warnings were available almost a week earlier, media reports reinforce the idea that many of those affected did not receive the warnings or did not understand the seriousness of the situation. On the other hand, sophisticated simulation methods are of little use if the data is precarious, since no methodology generates information, but only better exploits existing data[25]


. In a recent study, Hora et al[26]


analyzed decamillennial flood estimates for stretches of the Taquari-Antas river basin in Rio Grande do Sul. The results achieved differed when compared to those defined by the Generation Agents. The article concluded by recommending a review of the design flows of the Rio das Antas Energy Complex spillways, with special emphasis on the Castro Alves Hydroelectric Power Plant spillway.


174 | Dam Engineering | Vol XXXIII Issue 3


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