Study on Water Ecological Environment Protection and Restoration Technology of Rural River in Lixiahe Area

The construction of the new countryside has brought great improvement to the surrounding environment of the countryside and improved the quality of life of the peasants. However, due to the farmers’ low awareness of water environment protection, excessive use of pesticides and fertilizers, pollution of livestock and poultry breeding excrement, and arbitrary discharge of aquaculture tail water, the water quality of rural rivers has declined and water bodies have deteriorated. Agricultural non-point source pollution directly leads to the rapid decline of water environmental quality and the destruction of water ecosystem. In order to improve the rural water ecological environment, solve the difficult problem of water quality improvement in water function zones, and promote the coordination of economic and social development and water environment carrying capacity, through the use of microbial technology and ecological floating island plant purification technology, the ecological management of XinLiuan River, Dongping River, Renzi River, Hengjing River, Chengtong River and so on. Before using the improvement technology, the average values of ammonia nitrogen and dissolved oxygen in the river were 1.35 mg/L and 4.78 mg/L, after using the improvement technology, the average values of ammonia nitrogen and dissolved oxygen in the river were 0.7 mg/L and 5.35 mg/L, respectively. The water environment quality of the pilot river has significantly improved, the water quality has basically reached the standard of Class III water quality.