Dongjiang Source Area Present Situation And The Sustainable Utilization Of Land Ecological Security Assessment

Land is the important material resource of human existence and development. With the increase of economic development, the destruction on ecological environment of land is more and more serious, which continue to expand and deepen. People and land have become increasingly prominent. As one important aspect of ecological security, land resources are very significant.At present, there are many researches about the sustainable use of land resources between domestic and foreign, which are concentrated in the driving forces and trend change of land use patterns. Ecological safety research of land resources is the front in the development of a new topic. In the context, it has the historical and realistic significance for ecological safety research of land resources.The paper choose Dongjiangyuan region of Jiangxi province as the research object, which is in the typical eco-vulnerability region. Through the collection of historical maps, government statistics, the remote sensing image data, process and comprehensive analysis the land resources of sustainable use and the change impacts on ecological security. The main content and conclusion in this research are as follows:(1) Dongjiangyuan region land use change analysis. The paper analyze the temporal and spatial characteristics from several aspects such as the comprehensive index, dynamic degree, state index model of land use types, and further explored the dynamic changes of land use during the year1986to2005in Dongjiangyuan region. The results show that the LUCC was steadily developed in Dongjiangyuan. By contrast, types of land use change in the1995-2005years more than in the1986-1995years. Considering the transform of land uses in the region, forestland converted to farmland was the most widely distributed type. In the future, farmland area、water area and built-up land area will expand gradually, which have positive state index, and the others have negative state index values, thus they will slowly shrink.(2) Dongjiangyuan region land resources evaluation of ecological safety. Calculated Dongjiangyuan region in1986,1995,2005, the value of ecological security of the land use is57.42418,59.08604,59.08358. The paper analyze the major factor of ecological security is stability of ecological environment own from several aspects such as the structure safety index, human activities stress index, comprehensive security index analysis, but human activities have a significant impact on stability of ecological security, with the exploitation of land resources and interference strength. The moderate security area dominates during20years. From degraded degree of the whole period, the ecological environment of the study area has recession.(3) Sustainable land use recommendations of the ecological safety measures in Dongjiangyuan region. Based on the above analysis, the paper achieved land sustainable use of Dongjiangyuan region to meet its ecological safety purposes. According to the actual situation of the Dongjiangyuan region land resources and ecological security, from land resources, social economic and ecological safety, the study puts forward the corresponding countermeasures and suggestions from several aspects such as Control population growth, optimized configuration of resources, establish ecological safety monitoring system and so on.