【摘要】 引进土地利用的动态度和土地利用覆盖的景观格局指数,重点揭示1996~2004年张掖市土地利用类型的转化程度、时空差异及土地利用/覆盖的空间格局变化。结果表明:土地利用类型以牧草地、林地和未利用土地为主;建设用地和林地增幅显著,而耕地和牧草地数量呈下降趋势。从时间序列看,张掖市各区土地利用/覆盖的复杂度和均匀度指数增大,而优势度指数减少,指数变化以山丹县和民乐县为最大,表明张掖市各地区总体上看土地利用/覆盖破碎化程度在加强,尤以山丹县和民乐县强度大。更多还原

【Abstract】 By introducing the landscape pattern indexex of dynamic degree of land use and land use cover change,spatial pattern change is analyzed from 1996 to 2004 in Zhangye city.The results are as follows: the pattern of land use is mainly composed of grassland,woodland and unused land;there is an increase of construction land and a decrease of cultivated land and grassland;during 1996～2004,land use/cover change fractal dimension strengthened gradually,especially in Shandan and Minle city.更多还原