风沙过渡区土地利用变化及其驱动因素分析——以陕北榆阳区为例

Land Use Dynamic Change and Driving Force in Wind Drift Sand Region——Taking Yuyang of Northern Shaanxi As an Example

在GIS技术的支持下，依据土地利用动态度模型、区域差异模型和土地利用程度模型，全面分析了榆林市榆阳区1988～2001年土地利用的时空变化，并对土地利用变化的驱动因素进行了详尽分析。结果表明：林地、园地、耕地、居民点及工矿用地、交通用地均呈增长趋势，未利用地、牧草地和水域星减少趋势113年来，榆阳区土地利用变化速度较快，年变化率为0．45％。大于榆林市的土地利用变化速度；榆阳区土地利用变化存在着显著的区域差异；榆阳区土地利用处于发展期，并在榆林市的土地利用变化中发展较快。榆阳区土地利用变化过程中。自然因素的作用并不明显，社会、经济、技术等人文因素则在短期内具有决定性的影响。其中以总人口、工业总产值、乡镇企业个数和城市化水平等因子的作用最大。

Using GIS and such models as dynamic degree model, spatial differences model, change of land use degree model, analyzed the land use spatio-temporal changes in Yuyang during 1988 and 2001. Moreover, we at large analysed the driving force of land use change. The conclusions were drawn as follows. （1） During 1988 and 2001, land use changed observably. Forest land, garden land, farmland, rural residential land and city and town land, traffic land increased. Meantime, unused land, grassland and waters land decreased. The synthetic dynamic degree of land use in Yuyang per year is 0.45%, which was larger than Yulin City. （2） The spatial differences of land-use change in Yuyang is obvious. （3） The change ratio of land use degree showed that in the last 13 years the land use type was during regulation, （4） In the during of land use in Yuyang, the effects of natural factors are low. Among the driving factors, the social-economic factors, such as the population, gross production value of industry, the quantity of villages and towns corporation, urbanization level, are dominant.