Research and demonstration of water quality purification and ecological restoration technology for small and micro water bodies

Abstract

As an important carrier of water resources and water environment, small and micro water bodies play an important role in water storage, drainage, water conservation and water purification, and are closely related to people's production and life.In recent years, the small and micro water bodies in the rural resettlement areas in the Three Gorges Reservoir area have shrunk, the water quality has deteriorated, and the functions are not up to standard, which is one of the environmental problems strongly reflected by the migrants.Based on the principle of water ecological restoration, a variety of restoration combinations was used such as ecological purification beds, wetland plants and artificial aquatic plants to restore the function of water ecosystem and improve the landscape effect. Taking two types of small and micro water bodies of ponds and streams in a resettlement village in Zhuyi Town, Fengjie County, Chongqing as demonstration objects, this study carries out technical demonstration to improve water quality, restore the function of water ecosystem and enhance the landscape effect. The water quality monitoring result showed that after the main external pollution sources were reduced and controlled, the indicators of COD_Mn, NH₃-N, TN, TP and other indicators in the demonstration small and micro water bodies reached above the class Ⅲ water quality standard of the GB3838-2002, and the functions of the water ecosystem were restored. The demonstration effect was good, which provided technical reference and case reference for the comprehensive treatment of small and micro water bodies in the reservoir area.

Keywords

rural resettlement area / small and micro water bodies / water purification / ecological collaborative restoration / research and demonstration