The Change of landscape pattern in Zhenlai Xian, Jilin Province in recent ten years
吉林省镇赉县近10年景观格局变化

This paper concretely analyzes the change of landscape pattern of land use in Zhenlai Xian, Jilin Province. The analysis combines natural elements and humanistic elements. The information source is TM remote sensing image of 2000, 2005 and 2009 in Zhenlai Xian. Through the interpretation of RS on small scales, this essay superimposes and analyzes the spatial data model established by GIS. Moreover, the paper calculates the landscape characteristic indexes of the spatial data model. The analysis shows that the area and number of landscape patches in research district changed obviously in the past ten years. The patch number of water landscape has increased substantially. The dynamic degree of different landscape area has changed enormously in study district. The area under cultivation has increased by a large margin while the areas of grassland and unused land have decreased by a large margin. In the study district, the fragmentation degree of landscape is lower. The fractal dimension of landscape is smaller and changes little. The heterogeneity of landscape is low. The landscape is relatively integrated. The ecology in this district shows obvious vulnerability and easy resilience. Three main driving forces affected the change of landscape pattern of land use in this district restriction of natural environment, interference of human activities and policy direction. The three factors decide and affect the changing trend of landscape pattern.