Alney Island R&D - Precedent: Audubon's Corkscrew Swamp Sanctuary

The project for Alney Island requires us to design an accessible ecological park on a floodplain within high-risk Flood Zone 3. During a very rainy visit to the island, it was clear that most of the site is flooded by the River Severn - including the primary footpath that runs through the middle of the site.

There are several ways to develop on floodplain areas, and as I continue researching suitable measures, I will investigate precedents that have successfully created safe, enchanting trails and destinations that ensure the protection of the valuable habitats.

Designing with nature is an ideal solution to alleviating flood waters, providing flood water storage and enhancing biodiversity. The island already hosts a range of wetland areas that can certainly be expanded with created wetlands, scrapes and even riparian marshes that absorb and store excess water during periods of high rainfall whilst stabilising riverbanks and preventing erosion.

Wetland areas offer recreational opportunities for the public, such as birdwatching, hiking, and fishing. They are also important for environmental education and research. But how can we make these accessible if inundated with water at certain times of the year?

A common approach is stilt or raised structures, elevating footpaths and buildings above the expected flood levels. This allows floodwaters to pass underneath, reducing the risk of damage to both the structure and more importantly, the vulnerable ecosystems below.

The Audubon Society's Corkscrew Swamp Sanctuary is a natural wetland area located in southwest Florida, consisting of swamps, marshes, and wet prairies - playing a vital role in purifying water, preventing flooding, and providing critical habitats for many species. Conservation is at the heart of Corkscrew's mission and the landscape architects have focused on preserving and restoring these wetland ecosystems while making them accessible to visitors.

To allow people to experience the natural beauty of the sanctuary while minimising human impact on the fragile wetland environment, extensive boardwalks have been constructed. These raised, boardwalks wind through the swamp, offering visitors the opportunity to observe wildlife, plants, and the unique landscape up close. It is a great example of how access can be facilitated without causing harm to sensitive ecosystems.

The Corkscrew Swamp Sanctuary is not just a nature preserve; it also serves as an educational resource. Offering guided tours, visitor centres, and educational programs aimed at raising awareness about wetland conservation, ecology, and the importance of preserving natural habitats.

Like Alney Island, it is located in a flood-prone area and demonstrates how sustainable development on a floodplain can be achieved!

In summary, Corkscrew Swamp Sanctuary is an exemplary model of ecological preservation, wetland conservation, and landscape architecture working in harmony. It showcases how natural areas, especially those on floodplains and in wetland environments, can be protected, accessible to the public, and educational tools for raising awareness about the importance of these ecosystems.