The Río Cruces Wetland Center has issued a warning regarding the technical and sanitary dangers of constructing housing in Valdivia's wetland areas. The organization aims to reintroduce scientific evidence into the debate over the housing deficit, following recent statements by Minister of Housing, Iván Poduje.
According to reports from elmostrador.cl, the current discussion between authorities and the community has been characterized by confrontation and a lack of technical precision. The organization maintains that urban planning should integrate with local geography rather than attempting to modify it.
Local records indicate that wetlands cover 16% of Valdivia's territory. While this figure is higher than in other municipalities, the Wetland Center clarifies that it is far from the 100% figure some sectors use to justify construction in high-risk areas.
Geological and sanitary risks
Building permanent infrastructure on filled wetlands carries latent dangers to public safety. Water-saturated soil presents an unpredictable response during seismic activity.
The report highlights the risk of liquefaction, a geotechnical phenomenon where saturated soils lose strength during an earthquake and behave like liquids. This can lead to severe structural failures in homes.
In addition to the seismic threat, there are significant sanitation concerns. The diversion of sewage and the accumulation of gases caused by anoxic processes beneath landfill fill represent a public health hazard.
As water seeks to return to its natural channels, flooding and property damage are common. The Wetland Center emphasizes that "a modern and resilient city is not one that fights against its geography, but one that plans with it to ensure safe and dignified housing."
The organization also debunked the notion that these wetlands are a recent phenomenon resulting from the 1960 earthquake. These ecosystems have existed in Valdivia for over a thousand years, interacting with human settlements as far back as the Pitrén culture.
Finally, the report notes that Valdivia is Latin America's first "wetland city." This natural environment is an asset that increases property values and quality of life, positioning the city as a premier tourist and residential destination in the country.
