Ecologicale Security Assessment Based On Lucc And Rs/gis In Jinan City

Research on land use/cover change(LUCC) and its ecological effects is the key content of geographical study on global change today. And regional ecological security is one of the hot issues of ecology and ecological economics. In this paper, we selected Jinan City, which located in the middle of Shandong province, as the study area, took 2000/2005 two periods Landsat TM/ETM+and SPOT4 Pan-band data-based as primary data, and took the present land utilization situation as auxiliary data. And we utilized supervised classification method which was combined with visual interpretation method to obtain different periods of land using type maps. Applying the spatial pattern analysis methods of landscape ecology, we calculated various time intervals landscape pattern indexes and the landscape component transfer matrix of the study area, and analyzed the characteris and the evolution of landscape pattern of land utilization. Constructe model to carry on the appraisal to the Jinan ecological security, and carry on the analysis gradually.(1) we took the multi-phase remote sensing phantom data as the data pool, carried on the analysis appraisal to the region land use/cover change, and carried on the analysis and the explanation by using the landscape pattern indexs.(2) Based on the P-S-R model, a new state-incentives-Impact-Response (S-I-I-R) model was proposed. The model had some significant merits in ecological security evaluation, which not only inherited synthesis and flexibility of the traditional P-S-R model, but also covered the entire process of security assessment issues of the study area just ecological and the development of regional ecological security counter measures. It meets people's usual way of thinking and decision-making process. Based on the comprehensive analysis of the impact on ecological security of LUCC, combining statistics data of population, economy etc., and using S-I-I-R model, ecological security assessment index system was built in Jinan City.(3) AHP and Composite index was used the regional ecological security evaluation model. In order to grasp the macro-ecological safety of Jinan Cit, the evaluation results was analysized from county-level scale based on the overall evaluation of ecological security.The result show that comprehensive ecological security evaluation value in Jinan City decreased from 0.7291 to 0.6496 from 2000 to 2005, which were all "normal state". But ecological security evaluation of the land in 2005 had a larger decline compared with 2000.