Study On The Ecological Security Of The Po-yang Lake Based On Land Use Change

Along with the urbanized development,The land-use landscape pattern has been greatchanges and these changes had brought more and more serious problem of environment,soland use and ecological security become an important aspect of the ecological security.Asan imporant wetland which has important influence in ecologica,Po-yang lake region notonly undertake an important mission of a lake of clear water,but also paly an important impart ineconomic development in JiangXi Province. Therefore, it is of great significance on thestudy of land use and ecological security.The paper summarized land use and ecological security study at home and broad andwent through study of the theory and methodology. This article attempts to study theconstitution of land use and ecological security assessment index system from the structureand quantity of land use, the stability of spacial structure and ecological system for thestability. In this article,by using related mathematic methods, analyzed remote sensing dataand statistic data of Po-yang lake region during three periods of2000,2005,2008,assessed the status of ecological security of land use in Po-yang lake region. It mainlyincluded:(1) In terms of the structure and quantity of land use in various counties (cities) ofPo-yang lake region, The status of ecological security of land use in Xingzi and Yongxiu isdecreased year by year; Hukou performance for certain small increase in the structure andquantity of land use; other counties showed increased firstly and then decreased accordingto the land type proportion index.(2) In terms of the stability of spacial structure, Yongxiu and Yugan showed adownward trend in the period of2000-2008,Xingzi,Xinjian and Nanchang showed a slowadvancement in the index of the stability of spacial structure; other counties showeddecreased firstly and then increased.(3) In terms of stability function of land use, Nanchang and Poyang are more stable inthe ecosystem function than other counties; Xinjian, Jinxian and Yugan showed a slightdrop firstly and then increased.(4) Totally saying, only in Hukou and Dean,the ecological security situation has beenimproving, ecological security of Yongxiu presents a downward trend all the time; Xingziand Nanchang’s security of land ecological environment in a good condition firstly andthen decreased;other counties showed decreased firstly and then increased.(5) Based on the relevant literature, the standard of ecological security evaluation inPo-yang lake region was been set up. Through the land ecological security classificationmap of various counties (cities) of Po-yang Lake Region. we can see that the condition ofecological security in various counties (cities) of Po-yang Lake Region during2000,2005,2008.This provide the basis for land use planning in each counties.