Research On Ecological Restoration Technology And Application Of Coastal Salt Marsh

With the development of coastal zone,the coastal salt marsh are damaged to varying degrees.Ecological restoration is an effective measure to solve the problem.However,there are relatively few studies on the ecological restoration of coastal salt marsh currently and the ecological restoration of coastal salt marsh lacks theoretical and technical support.Therefore,this paper aims at coastal salt marsh,based on the relevant research results at home and abroad,combined with practical engineering application,numerical simulation and other means to carry out exploratory research on the ecological restoration of coastal salt marsh.The main research works and results are as follows:(1)Based on the existing research results on ecological restoration and the characteristics of coastal salt marsh,this paper summarizes the basic theoretical part of ecological restoration for coastal salt marsh from the aspects of functional positioning,related theory,basic principles and steps by the research results of others.(2)From the perspective of habitat rehabilitation,this paper research and discuss the technical content and application examples of coastal salt marsh ecological restoration.In terms of technical content,habitat restoration includes hydrological restoration technology and basal restoration technology.Hydrological restoration technology can adopt micro-terrain reconstruction,dam removal,tidal trench restoration,ecological wave elimination project construction,gate dam construction,freshwater supplementation and other measures to repair the hydrological environmental;basal restoration technology can adopt coastal saline-alkali soil improvement and soil fertility enhancement to repair the basal conditions.In terms of application examples,taking vegetation-habitat restoration as an example,this paper research the habitat rehabilitation plan of salt marsh in Tuanshan Marine Park.At the same time,this paper establish a two-dimensional hydrodynamic and sediment model of the study area to research the rationality by MIIKE 21.(3)From the perspective of biological restoration,this paper research and discuss the technical content and application examples of coastal salt marsh ecological restoration.In terms of technical content,biological restoration includes vegetation restoration technology and other biological restoration technologies.The vegetation restoration technology includes the Suaeda salsa and the phragmites australis restoration.other biological restoration technology includes microorganisms and sandworms restoration technology.In terms of application examples,taking vegetation restoration as an example,this paper research the vegetation restoration of saltmarsh in estuary salt marsh(take Xingcheng Liuhe estuary salt marsh for example)and coastal salt marsh(take Tuanshan Marine Park coastal salt marsh for example).The research in this paper can provide some theoretical support and reference basis for the ecological restoration of coastal salt marsh.