| The continuous development of social economy has brought heavy burden to the human settlement environment, improving the living environment and keeping ecological construction have become a growing trend. Rigorous scientific investigation, analysis and evaluation of the regional ecological environment can bring a reasonable planning layout of ecological environment, and improve the fragmentation degree of green patch effectively, at the same time also can balance the natural environment and the development of human society.This paper based on GIS and Fragstats, did the research of ecological vulnerability assessment of Longshan town, Cixi city. Through having combined with the space remote sensing image and targeted survey, this study extracted the basis information of Longshan town. By the qualitative and quantitative methods, we can have the analyze of the landscape pattern about Longshan town. This study built index evaluation system by principal component analysis. from two aspects of natural factors and human factors, we selected 10 factors of evaluation index. Though overlay of the Evaluation data, completed the ecological vulnerability assessment of Longshan town, And analyzed the landscape pattern of Longshan town. Having combined with hierarchical analysis of longshan town basic conditions and the results of evaluation, we can have a reliability test to the evaluation results. Finally, based on those analysis, the paper puts forward a planning idea of Longshan town, and give a green space system layout of longshan town.The result shows that the Longshan town have an uneven phenomenon of distribution and quantity,The landscape pattern is more complicated. The ecological vulnerability of Longshan town was general.The whole area was given priority with slightly, moderately, and heavily vulnerability. The extremely and heavily vulnerable area were located in the middle of Longshan town, The lightly and slightly vulnerable mainly distributed in the south of the town. With the urbanization development, human activities increases rapidly and give more land use. This condition will aggravate the ecological vulnerability of Longshan town, we can find a significant impact on urban ecological environmental.Control of population density, Increasing the area of forest, strengthening the connectivity in ecological corridors, controlling of population and the expansion of construction were main ways to reduce the ecological vulnerability. Thus, this study proposed a the green space system planning layout — "one lake, two sides, more network, more spot".From qualitative and quantitative analysis, this study though the GIS platform and analyzing the current condition in the study area, built the ecological vulnerability assessment system. this study can provide a scientific basis for ecological construction and give a technical support. |
