County Land Ecological Assessment And Space Management Research

Land is the basis of human survival and development, but the growth of population and the development of urbanization in these years have increased the contradiction between the ecological system and the economic benefit. At present, the large-scale development of land has brought different degrees of ecological problems to all parts of the country, destroyed the safety and stability of land ecosystem, and affected the sustainable development of economy and society. In order to protect and maintain the ecological system of the land, the governments and relevant departments at all levels of the state have attached great importance to the work of land ecological construction and environmental protection. Currently, the research on land ecological ecology mainly focus on just one problem or aspect instead of the integrated system,which includes the structure, function, problems and benefits of the land ecology.Besides, most of the researches are based on the macro comprehensive survey data instead of the medium or micro data. Therefore, it is an urgent task to understand and evaluate the ecological status of the land.This paper takes Jintan city of Jiangsu Province as an example, which is located on the economically developed areas, and the research is based on the data of 2010-2014 land change survey and the statistical yearbook. Research uses SPSS?Fragstats?GIS and other software for data integration and spatial processing, and analyzes the present situation, the characteristics of land use and the change of time dimension in the research area. From the classification of ecosystem types, research analyses the distribution status in different land ecosystem space and evaluates the ecological status of land in qualitative way. On the basis of the existing research theory, research uses two kinds of evaluation model of PSR and the "nature -economy - society" to build a comprehensive evaluation index system including 4 standards and 15 land ecological indexes,and makes a comprehensive evaluation on the structure, function, stress, and benefit of the land ecology. Besides, this paper uses SPSS to cluster the quantity, characteristics and spatial characteristics of various types of ecological zones, and puts forward some countermeasures and suggestions. In addition, this paper discusses the ways to improve the regional land ecological quality,and provides support for the future land management and scientific decision-making from the macro point of view.According to the analysis, the current land ecological structure of Jintan is reasonable, and the spatial distribution characteristics of each type of ecosystem are significant. The forest and garden land ecosystems show the characteristics of spatial agglomeration, and the spatial distribution of water and farmland is balanced. The ecological structure index increased gradually from east to west, the ecological function index was highly correlated with the level of regional economic development.Besides, the ecological pressure is balanced and the value of land ecological is not high. In the future, it is suggested that the land ecological quality should be improved by adjusting the ecological structure of the land, optimizing the ecological development pattern and establishing the ecological compensation mechanism.