Ecological Security Research Of Land Remediation Projects In Zhidan County

Ecosystem is the earth’s life support systems and the material basis and prerequisite of human production and development. For a long time, the human pursuit of rapid economic development and over-exploit natural resources, lead to increasingly prominent global ecological problems as ecological imbalance and environmental pollution. Ecological security has been seriously challenged. As China’s important strategy land remediation played an important role. But the land remediation goals great importance to social and economic, lack consideration of ecological benefits, ignore the importance of ecological protection of land resources. Through ecological security research of land reclamation project, it can effectively curb environmental pollution and ecological damage problem caused by the implementation of the project from the source. It is helpful to improve the scientific of land remediation work, and the theory and method system of ecological security evaluation of land remediation project. It provide certain information and reference for future ecological security research undertaken of land remediation projects.In this paper, it evaluated land remediation project in Zhidan county. The artcle divided evaluation unit by town and project type. At first, the article evaluated land remediation project in Zhidan county from the ecosystem values and landscape ecological security. Then it built eco Safety Evaluation System based on PSR model, selected 16 indicators, including increasing amount of the value of ecological services and landscape ecological security. Combined with the variation coefficient method and AHP to determine the weights synthetically, it evaluated ecological security of land remediation projects in Zhidan county quantitatively and divided ecological security status of each township and each project type. At last, based on the results of ecological safety assessment, it made a comprehensive analysis of Ecological security of land remediation projects in Zhidan county and made recommendations.Studies have shown that:(1) before Land remediation the total ecosystem services value of project area is 23.3341 million yuan, the value is expected to be 57.2694 million yuan After renovation, 33.9354 million yuan more than before.(2) The overall landscape ecological security index was 0.5022.(3) Ecological security index is between 0.35 to 0.65. There are 6 “safe” evaluation units, mainly in the eastern and southeastern of Zhidan county; there are 9 “safer” evaluation units, mainly in the northeast and southwest of Zhidan county; there are 3 “unsafe” evaluation units, mainly in the northwest of Zhidan county.(4) Land remediation implementation process should maintain the ecological diversity and landscape ecological security; great importance to the problem of pollution generated in the process of economic development and ecological environment pressure; actively take ecological and environmental protection measures and increasingly invest in ecological construction.