Works on the Porto Alegre dike do not influence the flooding of the Gravataí River, says Dmae The operation of the dike that is under construction between the Sarandi and Anchieta neighborhoods, in the North Zone of Porto Alegre, generated doubts on the part of residents affected by the flooding of the Gravataí River in the metropolitan region. The level of the Gravataí River varied between 4.77 meters and 4.79 meters until this Monday afternoon (3), above the flood level, which is 4.75 meters. A resident of the Americana neighborhood, in Alvorada, Adão Souza Dias Júnior had to leave his house due to the river flooding and questions the level of the flood. ? Access the g1 RS channel on WhatsApp "The water really rose last Monday. That's when it started to appear. Because when it appears and gets there, it's certain that it's high and then you need to leave the house. There's nothing you can do. And now we know that the North Zone is sending water here to the other side so it doesn't go to the airport", says Adão. Alvorada City Hall stated that it provided support to 50 families, or 129 people, to travel to the homes of relatives, friends or rented properties. Another six people, from four families, are sheltered in the municipal shelter, located at Ginásio Tancredo Neves. Using pumps installed on an emergency basis while the main work on the dike is completed, water from Arroio Passo das Pedras is directed to the Gravataí River. This process will be automatic when the work is complete. The work is expected to be completed in August this year. The operation prevents water from returning to neighborhoods and causing flooding in the North Zone. The structure is part of the region's flood prevention system. The image of water being drained into the Gravataí River is impressive, but according to the Municipal Department of Water and Sewage (Dmae), in Porto Alegre, there is no relevant influence of this flow on the river's flood. "It's as if we took a glass of water and placed it inside an Olympic swimming pool, for example. It's taking a grain of sand from a large basin full of sand. There are very small proportions of drying and the impact was measured in the regions here of Cachoeirinha and Gravataí", explains Vicente Perrone, CEO of Dmae. "Computer simulations and even all this water that is being placed have no impact on the level of the Gravataí River. We are quite calm. The competent bodies have already carried out the licensing", he adds. A technical note issued based on a study carried out by Rhama Analysis, a consultancy contracted by Porto Alegre City Hall, is the basis for the argument. According to the survey, the influence is 2 to 6 millimeters. Analysis carried out by the Hydraulic Research Institute, at the Federal University of Rio Grande do Sul (IPH/UFRGS), is in line with the note. For Fernando Meirelles, professor at IPH, the work is essential and does not cause any impact related to the flooding of the Gravataí River. “This work is essential to protect the North Zone of Porto Alegre, which has become very vulnerable, as we can see in the 2024 event. We consider that this construction of this emergency dike has no influence whatsoever on the issue of flooding in Cachoeirinha, Gravataí, Canoas”, says Fernando Meirelles. Operation of the dam in the North Zone of Porto Alegre has no influence on the flooding of the Gravataí River, says DMAE Reproduction/RBS TV VIDEOS: Everything about RS