A flood park is a type of green infrastructure designed to combine recreational, ecological and water management uses. Under normal conditions, it works like a conventional urban park, but it is prepared to collect, store and laminate water during episodes of intense rain, preventing flooding in the urban environment.[1]​.

Flood-prone parks have a topography adapted to allow the temporary accumulation of water. They include elements such as:

• - Depressions or retention vessels").

• - Ponds, lagoons and artificial wetlands.

• - Collectors and drainage channels.

• - Vegetation adapted to humid conditions.

• - Pumping or overflow systems connected to the sewer or treatment plants.

These spaces can store tens of thousands of cubic meters of water, which is then released in a controlled manner or reused for urban irrigation.

• - Hydraulics: Its main function is to act as a sustainable urban drainage system (SUDS), retaining rainwater in torrential episodes, which helps mitigate flooding in densely urbanized areas.[2]​.

• - Ecological: They promote biodiversity by creating microhabitats for birds, amphibians and riverside vegetation. They also improve air quality and reduce the heat island effect.

• - Social and recreational: They are integrated as green areas accessible to citizens, with trails, rest areas, children's games and educational facilities. In dry weather, its use is identical to that of an urban park.

• - La Marjal Flood Park (Alicante): pioneer in Spain, inaugurated in 2015, with capacity for 45,000 m³ of water.[3]​.

• - Luis Buñuel Water Park (Zaragoza): created after Expo 2008, it integrates lagoons, canals and a large floodable surface.

• - Benthemplein Water Square") (Rotterdam): flood-prone park-square in the Netherlands that collects water in large concrete depressions during storms.[4]​.