Before flowing into the engineered wetland, the dry weather flow of Yuen Long Bypass Floodway will first pass through the oyster shell pond, crushed brick and reed bed in the wetland for natural filtration and purification.

Before flowing into the engineered wetland, the dry weather flow of Yuen Long Bypass Floodway will first pass through the oyster shell pond, crushed brick and reed bed in the wetland for natural filtration and purification.

Before flowing into the engineered wetland, the dry weather flow of Yuen Long Bypass Floodway will first pass through the oyster shell pond, crushed brick and reed bed in the wetland for natural filtration and purification.