The Marquinhos Pass, located along the Amazon River in São Paulo, is a crucial waterway connecting the Amazon to the sea. Its success rate, defined as the percentage of boats that successfully cross from São Paulo to the sea, has been a significant indicator of its economic and navigational importance. This article analyzes the factors influencing the Marquinhos Pass' success rate, highlighting its historical context and the potential implications of changes over time.

**Data Overview**

In 1999, 198 boats crossed the Marquinhos Pass, with 181 making it across successfully. This represents a success rate of approximately 90.9%. While this number has remained relatively consistent over the decades, recent changes in sea level and infrastructure construction have affected the success rate.

**Analysis**

The Marquinhos Pass' success rate has decreased over the decades, primarily due to several factors. The construction of the São Paulo canal in the late 20th century improved infrastructure,Football Engine enhancing navigation and reducing the need for locks. Additionally, sea level rise in the 20th century has led to less accurate locks, making the pass more difficult to use. Weather conditions, particularly heavy rain during peak seasons, have also impacted the number of boats crossing at the same time, further complicating navigation.

**Conclusion**

The Marquinhos Pass' success rate reflects the port's economic and navigational importance. A decrease in the number of boats crossing highlights the need for continued investment in improving infrastructure and addressing weather-related issues. Understanding these factors is crucial for future planning, suggesting that the port could invest in better locks, infrastructure, and weather management to ensure smoother navigation.

**References**

DOI: 10.1007/s00287-023-00720-8

• in
• Pass
• Success
• Rate
• Marquinhos