沈阳市东部土地利用格局变化

以沈阳市东部１９７６～１９８９年的历史航空像片为基础，以地理信息系统（ＧＩＳ）技 术为手段，分析土地利用的空间格局及其变化．结果表明，针叶林、水田平均嵌块体大小增 加，旱地、落叶林、灌丛平均嵌块体大小减少；分数维值略有增加．预示嵌块体形状逐步复 杂化；多样性指数、均匀性指数增加．优势度和蔓延度指数由原来的１．６３２７和８９．２０２２分 别减少到１．３２２６和８８．２７４４，说明景观嵌块体的空间分布趋于均匀，嵌块体的聚集分布状 况将随时间的推移逐步分散化．此外．本文对沈阳东部土地利用格局变化的原因进行了剖 析．

Changes of land use pattern in eastern Shenyang

Historical aerial photographs from 1976 to 1989 and GIS technology were used to analyze the spatial pattern of land use and its changes in eastern Shenyang. The results showed that the mean patch size of coniferous forest and rice lands was increase, while the unirrigated land, deciduous forest and brush were decreased. Fractal dimension was slightly increased, indicating that the patch shape became complicated gradually. The indices of diversity and evenness were increased while the indices of dominance and contagion were decreed fm 1. 6327 and 89. 2022 to 1. 3226 and 88. 2744 respectively, which indicated that the spatial distribution of patches trended to be uniformed, and that the status of aggregate distribution of patches would be decentralized with time. The cause of these changes of land use pattern in eastern Shenyang was also explained.