【摘要】 应用RS、GIS以及GPS集成技术,以黔中喀斯特地区的猫跳河流域为对象,研究了这一地区从1973-2002年间土地利用/覆被的变化过程,并利用典型相关分析法研究了形成这种变化的驱动因素。研究表明,从1973-1990年,猫跳河流域耕地、建设用地、有林地、水域以及裸岩地呈增长趋势,而灌木林和灌草地趋于减少,流域生态环境质量下降。进入20世纪90年代后,有林地、灌草地、建设用地、水域持续增加,灌草地总量变化不大,耕地总量和裸岩地减少,流域生态环境质量趋于好转。定量分析表明,1990年以前,驱动建设用地变化的因素是总人口的变化,1990年以后则是农业产值;1990年以前驱动耕地变化的是农业人口的增长,1990年以后则和粮食产量的提高有关。更多还原

【Abstract】 In recent years,Chinese scholars have focused more on the karst rocky desertification issues in Southwest China.However,the comprehensive research on land use and land cover change in this area,which is closely related to the karst rocky desertification problem,has been paid little attention.By using the integrated technique of RS,GIS and GPS and by employing the methodology of Canonical Correlation Analysis,the authors have quantitatively studied the land use and land cover change processes and also their driving forces over the past 30 years.The results reveal that the area of arable land,construction land,forest land,water area,and rock-exposed land increased from 1973 to 1990 while grassland and shrub land reduced,which means that the eco-environment deteriorated in general.After 1990,forest land,grassland,construction land,and water area had kept increasing while grassland changed a little and arable land and rock-exposed land reduced,which suggests that the eco-environment tends to become better in Maotiaohe basin.Moreover,the quantitative research shows that it was the factor of total population amount that drove the change of construction land in the study area before 1990,but the factor of gross agricultural product after 1990.The increase of agricultural population was mainly responsible for the change of arable land before 1990,but the increase of corn yield after 1990.更多还原