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This project, in London’s Queen’s Wood, enhances the forest’s resilience to flooding during extreme precipitation in the wet season by creating wetlands along the forest’s existing stream channel. In the dry season, these wetlands retain moisture to ensure the growth of surrounding vegetation.
The design approach is: 1. to create wetland islands where the stream is blocked by fallen trees, 2. to inventory existing vulnerable trees on both sides of the river, anticipate when they may fall and decide what to do with them depending on their size and location, and 3. to make ‘leaky dams’ from tree branches and place them in ideal water storage areas.
Frogpool is an important water reservoir in Queen's Wood. To ensure that the water in Frogpool does not spread onto the pavement during heavy rainfall, wetlands and leaky dams have been installed along the river.
After heavy rain, trees may fall near the wetlands and the local community and visitors can dispose of the trees with the help of professionals and build leaky dams.
The area where the two rivers meet is where the worst flooding occurs during heavy rainfall and is an important landscape node in the forest. Two different types of leaky dam have been installed in this area to create water storage areas.