The concrete embankment that replaced soil along the periphery of the lake usurped the most important part of the wetlands, the transition zone, preventing the life there from being able to reproduce. The large-scale dredging of the lake bottom removed the seeds of aquatic plants, and the excessive water depth that resulted from the dredging made it inhospitable to plants.
取代泥土的卵石水泥堤岸，使得濕地最重要的「推移帶」不見了，導致兩棲生物無法上下繁衍；而大量挖除底泥，一併將泥中水生植物的種籽清除掉，池水過深也不利水生植物生長。