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What is the composition of tailrace wetland?

Ecological pond, surface flow wetland, submerged plant area and ecological river. According to the demonstration case of green development, the tailrace wetland is divided into ecological pond, surface wetland, submerged plant area and ecological river course, in which the ecological pond area has a total area of 49,808 square meters, a water surface area of 43 1.24 cubic meters and an effective volume of 86,248 cubic meters, and its main function is to reduce COD in water.