Hydrodynamic Study On Typical Ecological Wetland Conservation Scheme In Yangtze Estuary

In recent years,with the introduction of the concept of "great protection of the Yangtze river",China began to gradually pay attention to and control the environmental problems of the Yangtze river.The extensive and environmentally friendly development of the Yangtze river has overdrawn its self-purification capacity and the carrying capacity of resources and environment.Under the guidance of general secretary xi jinping's "joint efforts to protect the Yangtze river,not to engage in large-scale development",the country's ecological protection and management of the Yangtze river has become more urgent.Estuary wetland as interaction of alternating on land or sea area,the water conservation,environment purification,climate regulation,promoting the silting epeirogenic,prevent droughts and floods,maintain the ecological system and maintaining the diversity of species has irreplaceable function,but in recent years,the Yangtze river estuary section of wetland ecological destruction,some beaches,wetland because of the long-term unreasonable development and the upstream water scouring,has faced degradation risk.Therefore,it is urgent to carry out the protection and management of ecological wetland in the estuary of the Yangtze river.Estuary wetland itself is fragile,vulnerable to damage,not easy to restore,and is closely related to the surrounding water environment,hydrodynamic conditions.The key to its management lies not only in "protection",but also in "restoration".The process is very complicated,so it is necessary to carry out conservation research on the ecological wetlands in the Yangtze estuary.Ecological wetland as an example,this paper takes the Yangtze river tongzhou sand according to the evolution of wetland and its subordinate river,three different conservation scheme is put forward,and based on the hydrodynamics of MIKE 21 model module is established,including the river,the two-dimensional tidal current mathematical model using the river flood the discontinuous measured water and sediment data measured topographic data verifies the model hydrodynamic condition,the results meet the specification requirements procedures using the established mathematical model of ecological wetland conservation project in the tongzhou sand hydrodynamic research,comparative analysis of the hydrodynamic change under different conservation scheme and the effect of hydrodynamic around the study area Research suggests that conservation solutions small circle around a low beach and conservation solutions around the circle of three low beach all cannot achieve the ideal effect of conservation,and conservation scheme 2 high beach small circle circumference calculation of hydrodynamic impact on the surrounding the youngest,conservation effect is relatively good research results not only can provide a scientific basis for the section of the Yangtze river estuary wetland conservation,as well as the Yangtze river basin and even the rest of the country set up a model of wetland restoration and governance,for the future of the Yangtze river protection strategy also has a certain practical significance...