基于遥感影像数据的汉川市土地利用动态变化探讨

以1991~2002年汉川市土地利用遥感数据为基础,选取土地利用变化幅度、动态度、土地利用程度指数及景观生态学指标中的多样性、均衡度和优势度指数,对研究区的土地利用变化状况和驱动力因素进行分析。结果表明:1991年以来,汉川市土地利用结构中,水域、未利用地有所减少,建设用地增加,林地、耕地变化幅度和动态度最大;12年来汉川市土地利用处于调整和发展期,生态景观和均质程度在上升。综合分析表明,人口、经济、政策在土地利用变化中起着主导作用。

DISCUSSION OF LAND-USE DYNAMIAC CHANGE IN HANCHUAN CITY BASED ON REMOTE SENSING IMAGE DATA

Using the range of land-use change,the dynamic degree of land-use degree index and the indicators of the diversity of landscape ecology,balanced degree and dominance index,this article analysed the land-use change and its driving factors of Hanchuan City basis of the data of land-use remote sensing image of the city in 1991~2002.The results show that since 1991,Hanchuan land-use structure,the water,unused land decreased,an increase of construction land,woodland,farmland and dynamic variations of the largest degree;The land use in Hanchuan was in the adjustment and the period of expansion,the ecology landscape and the isotropic degree in the rise.The generalized analysis indicated that the population,the economy,the policy are playing the leading role in the land use change in Hanchuan.