Study On Greenland Landscape Pattern In Taiyuan City Proper

A study on greenland landscape of Taiyuan city proper was conducted. Large-scale aerial photographs (1:25000) were used as information source, greenland map was made through MAPGIS software, and a related database was set up. Based on the database, the current landscape pattern characteristics were analyzed in this paper, which include patch size, patch shape, patch fractal dimension and landscape pattern as a whole. The research findings are as follows:1.The distributions of patch size are extremely uneven in eight types of greenland, each of which includes many small patches, and most of them show a lognormal pattern of distribution. The area of affiliated greenland or parks is bigger than that of other types, so both of them are the main components. Though the number of patch of affiliated greenland is larger, its average area is smaller, so its degree of fragmentation is higher.2. The shape index 1 (SI1) becomes smaller as the patch becomes bigger; the shape index 2 (S12) becomes larger as the patch becomes bigger. The residential greenland is similar to circle and more compact; the shape of shade trees is greatly different to circle and quite loose. The former benefits reserving energy and nutrient, and increasing the biodiversity; and the later could promote the interaction between its inner and outer components.3. The calculated Df values of all types are less than 2, indicating a low degree of perimeter complexity as a whole. The Df of production greenland is small; the Df of shelter forest is large, indicating that production greenland has simplest perimeter pattern, while shelter forest most complex perimeter pattern.4. There aren't great disparities in areas among all types. So the degree of evenness is high and the dominance is low. The degree of fragmentation of residential greenland is highest, that of parks lowest. The degree of separation of urban country is highest, those of affiliated and residential greenland lowest. According to the diversity indices of number of patch, area and equal probability, the distributions of perimeter, area and the number of patch are extremely uneven.