The current water reservoirs in São Paulo are stable; however, climate change raises concerns for long-term water security. Experts warn of increased temperatures and irregular rainfall patterns that could lead to water scarcity. Initiatives to improve infrastructure and sustainable practices are underway to mitigate potential future crises.
Recent reports indicate that, despite the current comfortable reservoir levels in the São Paulo metropolitan area, climate change poses significant concerns for future water security. Experts caution that rising temperatures and diminishing rainfall may lead to a potential water crisis. José Marengo, the general coordinator at Cemaden, emphasizes that while the immediate scenario is manageable, a preliminary alert has been issued due to unpredictable climate patterns.
As of February 27, 2023, the average capacity of reservoirs in Greater São Paulo was 61.7%, a stark decline from the previous year’s 77.3%. With a history of irregular rainfall and increased temperatures, experts like Samuel Barreto from TNC warn that historical averages are not being met. He noted that since last October, water sources have consistently failed to meet expectations.
Marengo further elaborated that rainfall now occurs in intense bursts, diverging from the city’s past climate patterns. This shift has contributed to severe events, including wildfires in western São Paulo. Ana Paula Cunha of Cemaden revealed that recent rain data shows less consistent precipitation, which could mislead perceptions about the overall water supply, indicating a worsening of extreme climate phenomena.
While the current water situation is reported as stable, Samanta Souza from Sabesp emphasized the importance of maintaining the water security index. Jerson Kelman, a former ANA president, noted improvements in water infrastructure since previous crises, enhancing resilience against droughts. February 2023 recorded unprecedented water treatment rates, showcasing systemic enhancements.
However, Marengo urges for attention to improve water distribution systems, citing waste from aging pipelines. Cunha holds that greenhouse gas emissions significantly influence the changing precipitation patterns, projecting long-term impacts unless addressed globally. Initiatives aimed at mitigating these climate-related challenges have been emphasized by local authorities.
Sabesp is actively pursuing projects to augment water flow capacity, including the Itapanhaú River transfer and expanding systems from the Rio Grande and São Lourenço rivers expected to complete by 2027. The São Paulo Municipal Government is preparing a new sanitation plan with UN-Habitat support focused on long-term water security.
Although noteworthy progress has been made since prior water disruptions, experts like Barreto stress ongoing adaptation and resilience strategies are essential. He suggests reforesting watersheds can enhance water supply significantly while lowering mitigation expenditure. With the statewide environmental initiatives already initiated, there is potential for further development in this critical area.
In summary, while the current water supply in the Greater São Paulo area remains stable, experts highlight emerging challenges linked to climate change that threaten long-term water security. Proactive measures, such as improving infrastructure, managing water distribution, and employing reforestation, are essential to mitigate future risks. Continuous adaptation and innovative strategies will be paramount in navigating the complexities of a changing climate.
Original Source: valorinternational.globo.com
