The Theory And Practice Of Ecological Building In Hang Jia Hu Plain River

Based on the summary and analysis of the historical conditions, the survey method and test detection method are used combined with typical case studies in this paper. The shortcomings of the traditional river regulation are pointed out and new river regulation methods are explored, which aims to meet navigation and other functions of the river, to restore biodiversity in the river, to improve river water quality, to improve the natural landscape along the river, and ultimately achieve the harmony between man and nature.The main research results of this paper are:The ecological restoration construction of Xinjiang Pool abandoned the rigid revetment, and the stone revetment is also replaced by plant revetment, which changed the traditional thoughts of channelization and hardening. Both aspects of the habitat protection and land use have been taken into account, the continuity and the meandering of the rive have also been retained, as well as other forms of the original river landscape, such as the pools, the shallow and the shoals. The repair construction tries to avoid the regularity and single shape of the cross-section. At the same time, the slope protection construction avoids using hard materials, which in the end could make the waterside environment more variable, and could maintain the natural environment suitable for survival and breeding of aquatic organisms, improving the diversity of biological communities in the river.In the case of Muchangqiao Port, the paper made an innovation in the standard of dredging cross section and management ideas. The river cross-section varies in the width, and the elevation of the riverbed also varies along the river, which will help to diversify the flow pattern and improve the water environment. The management idea has changed from comprehensive regulation to local regulation.This paper promoted the investment and management mode of plain river channel, from theory to practice, from pilot to generazation, from construction to evaluation. Furthermore, it analyzed the characteristics and applicable conditions of different governance modes.