银川市土地利用时序动态变化研究

根据2003～2007年银川市土地利用及其动态变化数据,分别采用土地利用结构变化贡献率、变化强度指数和变化速度以及单一土地利用动态度,对这5年间土地利用结构的时序变化进行了分析研究。结果表明,2003～2007年,银川市土地利用结构发生了较大的变化,耕地、未利用地面积逐年减少,耕地每年下降的幅度最大;居民点工矿用地、交通用地和水利水域用地迅速增加,城镇建设用地每年的增加幅度最大;园地和林地的变化不明显。

Study on the Land-use Temporal Dynamics in Yinchuan City

Based on land use and its dynamic change data of Yinchuan City from 2003 to 2007,timing changes of a land use structure during these 5 years were analyzed by using the contribution rate,intensity index and speed of land use structure changes and land use dynamic degree of single land type. The results showed that in past 5 years,land use strucure of Yinchuan City had been great changed,cultivated land and unused land outflowed year after year,especially the cultivated land. Urban and rural settlement area,land for transportation and water conservancy facilities land increased rapidly,among which urban and rural settlement area increased most . The changes of garden and forest land didn’t have obvious changes.