广西海岸带地貌与土地利用分形特征研究

Study on Fractal Characteristics of Coastal Geomorphology and Land Use In Guangxi

近年来,随着人类活动的日益频繁,作为城市地域空间发展前沿的海岸带地区的土地利用变化显著。为定量化地研究海岸带地区土地利用的空间结构特征及其变化强度、复杂性和稳定性以及土地利用类型在各种不同地貌形态下的分形特点,本文以广西海岸带为研究区,利用分形理论,结合GIS技术,选取边界维数和计盒维数对土地利用类型的斑块复杂性、空间占据比进行了分析,选取边界维数对不同地貌的土地利用类型的分形特征进行了研究。结果表明:广西海岸带地区的土地利用分形特征比较明显,相同地貌环境下,不同土地利用类型分维值和稳定性指数有所不同,研究区土地利用类型的边界维数的大小排列为林地>草地>未利用地>建设用地>耕地>水域>沿海滩涂>其他用地;不同地貌条件对土地利用类型的分形特征影响也较大,对不同土地利用类型的分维特征影响也有所差异。

In recent years, with frequent human activities, as the coast of urban spatial development frontier belt area of land use change significantly, for the quantitative research in the coastal zone land use spatial structure characteristics and change intensity, complexity and stability and land use types in different landform morphological fractal characteristics, the Guangxi coast belt as the study area, using the fractal theory, combined with GIS technology, select boundary dimension and box counting dimension of land use types of patch complexity, space occupy ratio is analyzed, select the boundary dimension of different landforms in the land use types of fractal features are studied. The results showed that the Guangxi coastal zone land use fractal characteristic is obvious, the same geomorphic environment and different land use type fractal dimension value and stability index of different, land use type in the study area of the size of the box dimension arrangement for land 〉 grassland 〉 unused land 〉 construction with 〉 cropland 〉 waters of coastal 〉 other land; different landforms types of fractal characteristics of land use also affects larger impact on the fractal characteristics of different land use types also vary.