A river with a tale of transformation awaits. Once known as Rio de Sacavém the Rio Trancão whispers stories of battles and recovery. The Rio Trancão now flows before you. It is a small Portuguese river approximately 29 kilometers long.
Let’s journey back to 1147. Imagine D. Afonso Henriques facing the Moors on these very banks. This was the Batalha de Sacavém a prelude to the capture of Lisbon. The Rio Trancão witnessed the clash of civilizations.
Fast forward to the 18th century. Picture stones and grand bells traveling along the Rio Trancão. They were destined for the towers of the Convento de Mafra. The river served as a highway for progress.
Until the 19th century the Rio Trancão was vital. It connected the capital to the fertile lands north of Lisbon. Agricultural goods flowed to market. Fishing communities thrived and salt production prospered thanks to the tides.
But the Rio Trancão’s story took a dark turn. The 20th century brought industrialization and pollution. The river earned the infamous title of one of Europe’s most polluted. Its waters ran black and its odor became unbearable.
Yet the narrative doesn’t end there. The EXPO’98 project sparked a cleanup. Wastewater treatment plants were built. The Rio Trancão began its journey to recovery.
However challenges persist. A study by students revealed mercury in the sediments. This is a legacy of past industrial contamination. Despite the pollution the mouth of the Rio Trancão is no longer considered a high-risk area.
Today The Ocean Cleanup estimates that around 5900 kg of plastic waste are transported annually to the mouth of the Rio Trancão. This serves as another source of waste for the Tagus River and consequently for the Atlantic Ocean.
The Rio Trancão is a resilient river. It is a testament to nature’s ability to heal and adapt. It reminds us of our responsibility to protect our environment.
So as you stand here by the Rio Trancão remember its past. A past filled with battles and pollution. A past of transformation. A past that shows how important it is to take care of our environment.