| The proposing of "New Silk Road Economic Belt" strategy provides new ideas for the development of western culture and economy in China. Especially, with the key significance of the environment protection in site area, study on the relationship between the fragile ecological environment and tourism sites in western area has got great attentions. This paper takes Liquan County in Shaanxi Province as a research object. Based on three Landsat 5 and a Landsat 8 satellite remote sensing images, the thesis uses the landscape transfer matrix to analyze landscape transfer flow. Besides, the concentric pattern method is used to probe the changes of landscape indexes, through which it aims at revealing the characteristics of landscape pattern in corresponding site area. Furthermore, the model for landscape ecological quality is established to assess the landscape quality of Liquan County in 1993-2014 and to evaluate the ecological status under the influence of site tourism. The main contents and conclusion are as follows:1.To classify the landscape from these remote sensing images using software ENVI 5.1, It probe the landscape change process of research area in 21 years with the landscape transfer matrix. Besides, taking the tourism site as the center, the thesis further makes a concentric circle by 2 km radius to explore the landscape index scale effect. Meanwhile, the tourism area is specifically divided from three directions, including the Northwest, Southwest and Southeast to analyze the characteristics of landscape pattern. Especially, the landscape ecological quality evaluation system is established by combining the landscape disturbance and stability, through which it tries to make a comprehensive analysis of landscape ecological quality.2.The database of the dynamic landscape elements in Liquan County shows that the change of landscapes is stable in the past seven years. However, the metastasis relationship of landscape types becomes more complicated, of which the shift relationship among farmland, woodland and construction land have become a key relationship of all shifts. Meanwhile, the change of landscape pattern in Liquan County was significantly affected by topography in the year 1993 and 2000 while the site tourism was gradually extended in the year 2007 and 2014. As a result, landscape pattern in radiation area has dramatically changed, especially in the Northern Plateau region and the Southern plain region. The radiation radius of site tourism are respectively 12 km in the Northwest,12 km in the Southwest and 14 km in the Southeast, which are just in accord with the spatial distribution of agriculture picking garden.3.The evaluation result of landscape ecological quality shows that the third-rate landscape area in Liquan accounts for 73.36% of the total area and the landscape quality is generally good. By comparison, the third-class matrix landscape under the influence site tourism has a drop for 7.59% in 21 years. Meanwhile, the ecological quality has obvious differences between site groups and its periphery, presenting a polarization trend. To be specific, the Southern area of Liquan County and the area with rapid economic development are mostly affected. |
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