Study On Evaluation Of Land Ecological Safety In Chengdu City

Now in the society, the land resource has become the indispensable material base to human survival and development. Along with fast development of social economy as well as increase of human activity, the use intensity of land resource aggravates day by day,the land ecological environment is also destructed day by day. Therefore, the land ecological security is proposed on the program of syudies gradually, the related research also become a more important front topic. Although the related research of land ecological security is unceasingly thorough, the related research is not many at present, it is still in the initial stage of research. The theory of land ecological security appraisal is also at the exploration stage, the evaluating indicator system and method are still difficult questions in the research.This research that takes Chengdu as the studied region has conducted the correlation analysis research for its natural environment survey, the social economy environment condition and the land utilization condition. On the base of the predecessor research results foundation, the Chengdu land ecological security appraisal target system is conducted according to land ecological security present situation, this study evaluates the condition of the land ecological security by using the utilization improvement entropy value, the multi-objective quality synthetic evaluation and harmonious cooperation scheduling model. In this foundation, this study discusses the countermeasure and the suggestion that can enhance the land ecological security in Chengdu from the land nature, the society, the economy and the environment and so on four aspect factors.This research has the following several respects through the main conclusion that relevant analysis draw:First, the land ecological security synthesis value in Chengdu overall assumes the trend of escalation during ten years that are 1998-2007 year, explained the land ecological security condition assumes improves the tendency, but the change scope is extremely small.Second, in the land ecological security various subsystems in Chengdu, the influence which the land economical ecological security whose weight is 0.3201 has on land ecological security condition in Chengdu is the biggest, this explains the economic agent is playing the extremely vital role in the land ecological security, the influences which the land society ecological security, the land environment ecological security and the land natural ecological security have on the ecological security condition in Chengdu reduces in turn.Third, in the land ecological security system in Chengdu, the harmonious relations between four factors of ecological security are unstable, the coordinate coefficient has been fluctuating change for ten years and its coordinate coefficient is finally weaken.Fourth, this research discusses the countermeasure and the suggestion which can enhance the land ecological security in Chengdu from the nature, the society, the economy and the environment and so on four aspect factors in connection with the main land ecology questions that the Chengdu city faces at present.