A £10 million scheme to protect almost 2,000 homes and businesses from flooding, which includes more than 12 acres of urban wetland, has been completed.
The project in Salford, Greater Manchester, has created a flood storage basin that can hold more than 250 Olympic-sized swimming pools worth of water to reduce the risk of flooding from the River Irwell, the Environment Agency said.
The 28 hectare (70 acre) flood basin within a meander loop of the Irwell will hold water in flood conditions to protect properties in Lower Kersal and Lower Broughton, which was affected by devastating flooding on Boxing Day 2015.
The scheme also aims to boost local wildlife populations by creating five hectares of high-quality urban wetland habitats, with its completion marking World Wetlands Day.
Wetlands can help slow the flow of water, reducing flood risk, filter water and capture carbon, as well as provide habitat for wildlife, the Environment Agency said.
The embankments around the site have also been planted with wildflowers to attract species such as ladybirds, moths, butterflies and bees.
Emma Howard Boyd, chairwoman of the Environment Agency, said:
Floods minister Therese Coffey said: