The Study Of Change In Ecological Land Use And Its Impact On Ecological Environment

Land is the foundation of development,people’s livelihood and even ecology.Since the 18th National Congress of CPC,the construction of land ecological conservation has caught unprecedented attention,and ecological land has become an important part of the construction of ecological civilization in various related policy documents and plans.In the 19th National Congress,Accelerating structural reform of ecological civilization and building a beautiful China puts forward the goal for people to live better,that is,to create more material and spiritual wealth to meet people’s increasing need in life and provide more high-quality ecological products to meet people’s increasing need in beautiful ecological environment.The country is advocating the construction of ecological civilization,cities are also creating ecological cities."ecology" has undoubtedly become the guiding landmark of our living environment."Ecology" is a positive,green and friendly word.Beautiful "ecology"both brings human good feelings in sense and has a good impact on the ecological environment.With the land data of Guiyang city in 1998,2003,2009,2015,and related research methods,such as the Land Use Dynamic Index and Ecological Index,the change of the quantity and structure of land use in Guiyang city and the change trend of ecological land use were analyzed,based on which,ecological environment is evaluated with EI,and what impact will have on ecological environment of Guiyang city also is discussed.In the end,the corresponding conclusions are drawn and suggestions for how to protect and manage ecological land is put forward.Research findings:(1)The constant increase of ecological land in Guiyang.In all the land used in Guiyang,from 1998 to 2015,ecological land’s ratio had increased from 86.61%to 92.6%.Among them,woodland,garden land,water wetland are growing continuously with woodland increasing the fastest and having the largest proportion.(2)The unstable state of ecological land in Guiyang.The higher the positive land use dynamic index is,the more the ecological and environmental benefits.The larger the positive land use dynamic index number is,the more land area is increased and the better the impact on the ecological environment is.The larger the negative land use dynamic index number is,the more land area is reduced and the worse the impact on the ecological environment will be.(3)Forest land as the type of ecological land that contributes the most to ecological environment.Among all land types,grassland is at the second place followed by water area wetland,arable land,and the least contribution is unused land.(4)The circular and cumulative effect that the change of ecological land use has on the ecological environment.The more ecological land area increases,the more biological diversity the research area possesses,the wider the vegetation coverage is,the greater the force of climate regulation on the research area,the stronger the force of soil and water conservation,which influence the atmosphere,hydrosphere and soil-sphere,thus bringing about a cyclic and cumulative effect on the ecological environment.(5)The ecological land use affects ecological environment as a complex process,in which the urban development process,ecological land use change and ecological complex system interact each other.Among them,the urban development process is the fundamental driving force influencing the change of ecological environment,the change of ecological land use is the driving force,and the change of ecological complex system is the direct influence.Therefore,we suggest that Guiyang should make further rational use of land and optimize the structure of land use in terms of land use and management,increase the grassland area to make up for the lack of ecological land,maintain the existing arable land and garden area and efficiently exploit unused land.