Land Use And Land Cover Change And Ecological Security Assessment Of Land Resources In Jinjiang City

Land resources is crucial to the development of human society, and it is the material base relies for survival and development of human society. In recenty ears,with the rapid growth of population, the constant improvement of the level of urbanization and the rapid development of social economy, the degree and scope of the development and utilization of land resources are in increasing and ecological security of land resources under the interference of human activities is more and more big. Under this background, study of land use/cover change on the influence of the ecological security of land resources, it is very important and realistic significance.In this paper, on the basis of learning research results of scholars both at home and abroad, choose Jinjiang city of Fujian province as the study area. By collecting the land use data, statistical data and the theory and technology, using the index and method based on entropy weight, the study area in 2000,2005 and 2011, land use/cover change, and under this kind of change on the impact on land resource ecological security are analyzed. The main conclusions are as follows:(1) Jinjiang land/cover change analysis. This study respectively from jinjiang structure of land use/cover type, quantity, and landscape pattern analysis. Analysis results show that: ① structural changes. Throughout the study period, in addition to the construction land area increased by 36.41%, the rest of the land use type area decreased to some extent. Among them the most to reduce the proportion of the grass,11 years decreased by 63.08%, decrease the proportion of is relatively small,11 years decreased by 16.09%, for the smallest percentage of decrease, only 5.99%. ②The number change. Throughout the study period, only the right to use construction land area increases, the increase of 95.82 km2, annual rate of 3.31%.Reduction of arable land for a maximum of 33.06 km2, and the annual variations of the grass, the fastest rate reached 5.73%.The decrease of water quantity is less,11 years to reduce 7.78 km2, annual rate is only 0.54%.③On the landscape pattern change. From the perspective of the spatial pattern of patch number and patch density in 2000-2011 are in decline, the largest plaque index has increased and the average patch area, description of the landscape fragmentation degree of relief; Landscape diversity index and evenness index decline trends, reflects the research area in the proportion of various landscape types difference increases gradually, also explains the land use in increasing human disturbance.(2) Safety Evaluation of Land Resources Ecological Jinjiang City. In this study, from land use/cover type perspective to build pressure-state-response (Pressure-State-Response) model framework, in-depth study of other scholars research results on the basis, combined with the characteristics of the study area’s ecological environment, from population-Resources-economy-environment, such as starting to build ecological security evaluation index system, selected 22 evaluation and develop evaluation criteria, the use of land resources in Jinjiang City, ecological security based on entropy weight composite index were studied. The results showed that:Jinjiang City Land Resources Comprehensive Security in 2000 rose to a value of 0.617,2005 0.742,2011 years and declined slightly to 0.674; from the point of view of the ecological system security, ecological security Jinjiang risk level to rise from sensitivity level, showing the transition from poor to overall good condition. However, the protection of land resources and ecological security is still the focus of future work.(3) Jinjiang City Land Resources Ecological Security Protection Measures. Based on the above analysis and evaluation of the results, in order to protect the ecological security of land resources in Jinjiang City, in this study were from the adjustment of industrial structure, to carry out afforestation, energy conservation and other five put forward the corresponding countermeasures to achieve Jinjiang ecological environment and social economy coordinated development.