Study On The Influence Of Land Reclamation On Vegetation Succession In The Riparian Zone Of Poyang Lake

Human land use behavior has greatly affected the global ecosystem and climate change.In recent years,due to the impact of human activities and species invasion,the ecological environment of the lake area has been destroyed,and the wetland vegetation pattern has evolved to some extent.In order to formulate scientific wetland utilization and conservation strategies and achieve sustainable development of wetland resource utilization,it is urgent to quantitatively grasp and study the current status and dynamic changes of wetlands.3S(GPS,GIS and RS)technology can provide strong technical guarantee for wetland research,reasonable evaluation of wetland changes and prediction of future wetland development trends.This dissertation selects Poyang Lake wetland as the research area.Due to satellite remote sensing technology can acquire continuous large-scale spatial information in a short time,it has spatial macroscopic,using the high scores of remote sensing data for the 2013 and 2017 phases.Using satellite remote sensing technology to obtain land use information in Poyang Lake eco-economic zone,based on the analysis of pop features and image features,based on expert knowledge,discover the automatic extraction methods of water,mudflats,wet plants and emergent plants.Provide reference for high score image processing and wetland research.A comprehensive and objective reflection of the impact of land reclamation on the Poyang Lake wetland in the past five years.The dynamic changes of vegetation pattern in the research area and its relationship with human activities were analyzed to provide a theoretical basis for rational development of Poyang Lake regional resources.Through the study of the wetland riparian zone in the research area,65 plots were selected to investigate the width of the riparian zone,vegetation type,vegetation coverage,human disturbance degree,surrounding land use type,and distance from the riparian zone.And other indicators.The clustering analysis method was used to summarize and classify the existing main vegetation in the riparian zone of Poyang Lake wetland.The existing vegetation allocation in the riparian zone of the Poyang Lake area is divided into five categories.Then,through the object-oriented classification method,the comprehensive analysis of the remote sensing image interpretation results,first analyze the surrounding area of the wetland in the research area,and then analyze the vegetation succession in the riparian zone of Poyang Lake.Finally,by excluding the areas with more serious human influence as the key research area,this dissertation discusses the impact of land reclamation behavior on the vegetation succession in the riparian zone of Poyang Lake.The research indicates that the land reclamation behavior in the research area has played a positive role in the restoration of the ecological environment of the wetland riparian zone in the past five years.