Study on Ecological Restoration of Pond Wetland in Liaohe Conservation Area

The Liaohe Conservation Area has more sandpits between 100 km of Qinhe river estuary and Mahu mountain, which provide the basic conditions to construct pond wetlands. The pond wetland restoration method, pond water system connection technology, ecological restoration technology and construction engineering design were introduced. Thirty pond wetlands should be constructed in Tieling, Shabaotai, and Shifosi section. Three pond wetland groups were formed through building 2-3 m wide connecting ditches to realize pond-pond and pond-river water system flow. The ecological system of pond wetlands could be recovered by controlling the underlying surface of wetlands, vegetation restoration, habitat restoration and hydrological regulation and management. The pond wetland engineering design included wetland net construction and aquatic plant community reconstruction engineering, which could remove the suspended solids, COD_Cr and ammonia nitrogen in the main steam, increase the water storage capacity of 9.09 million m³ and improve the ecological environment of Liaohe river basin effectively.