【摘要】 以黄土高原上黄小流域土地利用变化图谱为数据基础,采用RS/GIS技术与数理统计法,研究了其土地利用动态变化状况及其驱动因素,以期为黄土高原小流域水土流失综合治理提供数据基础和理论依据。研究结果表明:(1)根据景观基质的不同,可将该流域土地利用变化划分为3个阶段:1982—1990年以草地为主,1990—2002年以耕地为主和2002—2008年以林地为主;(2)近30a来上黄小流域土地利用发生了明显的变化,主要表现为林地面积大幅度增长,坡耕地面积减少和果园面积逐年增加。研究表明,土地利用变化是影响区域水土流失的重要因素,可以通过土地利用结构的合理布局来减少水土流失。更多还原

【Abstract】 The purpose of this study is to provide database and theoretical basis for the comprehensive control of soil and water loss on the Loess Plateau of China by studying land use change and its driving forces in Shanghuang small watershed based on land use change map.Methods employed include RS/GIS and statistical analysis.Results showed that land use changes in the small watershed can be divided into three phases according to the change in the landscape matrix whereby the dominant land use was grassland(1982—1990),cropland(1990—2002) and forestland(2002—2008).The land use in Shanghuang small watershed greatly changed in recent 30 years,mainly including substantial increase in forest and grassland area,decrease in sloping arable land and expansion of orchard area year by year.It is concluded that land use change is an important factor to impact soil and water loss,and soil and water loss can be reduced by adopting rational land use structure.更多还原