Early in the morning, when Santiago de Chile has yet to burst with its noise, the urban wetland of the San Ignacio canal maintains a fragile balance. There, in the Quilicura commune, the cattail grows as a living barrier between the city and the water.
In that setting, the cattail harvesters advance with measured steps. With simple tools and precise knowledge, they select what to cut and what to let grow so as not to alter the flow.
Thus, the artisanal craft becomes a key environmental task within one of the most industrialized areas of the capital.
An ancient knowledge facing modern problems
For decades, the Quilicura canals received waste, discharges, and heavy materials. Consequently, the cattail was seen as a nuisance.
However, over time it was proven that this plant plays a central role in the natural purification of water. Its roots filter pollutants and retain sediments.
Therefore, the knowledge of the cattail harvesters ceased to be marginal and became part of the wetland restoration strategy.
Urban wetlands under constant threat
In the Metropolitan Region, dozens of illegal dumps have been identified, many still active. Most are concentrated in peripheral communes like Quilicura.
This phenomenon accompanies urban growth without adequate planning and generates pressure on ecological corridors that still connect the city with other watercourses.
Even degraded, the San Ignacio canal remains a refuge for birds, mammals, and riparian species that traverse the urban fabric.
Restoring without destroying the ecosystem
In response to this reality, the municipality promoted its declaration as an urban wetland. With the support of social organizations, they began cleaning and monitoring tasks.
In parallel, the cattail harvesters were integrated into a management plan that prioritizes selective pruning and avoids the use of heavy machinery. In this way, the existing vegetation is protected and its capacity to improve water quality is reinforced.
How this initiative benefits the environment
The controlled management of the cattail reduces the turbidity of the water and decreases the presence of metals associated with urban waste. Thus, the canal acts as a natural filter.
Moreover, as it reaches the Pacific Ocean cleaner, the water reduces its impact on coastal ecosystems, closing a cycle of environmental protection.
Added to this is the conservation of local biodiversity, as the vegetation offers shelter and food for birds and native fauna.
The wetland as an educational and community space
Currently, the San Ignacio canal includes walkways, monitoring points, and environmental signage. These elements facilitate care and prevent new discharges.
During nesting, interventions are reduced to protect the birds. Management adapts to the rhythm of the ecosystem.
Additionally, schools and neighbors tour the wetland, learn about the cattail, and recognize its value within the neighborhood.
A replicable model for other cities
The experience of Quilicura demonstrates that urban restoration can rely on local knowledge and nature-based solutions. Far from eradicating vegetation, caring for it allows for the recovery of water, biodiversity, and community ties.
Thus, the San Ignacio canal ceases to be a forgotten edge and becomes an environmental axis that redefines the relationship between city and nature.
