中文摘要：

农村劳动力的流动不仅受经济社会的拉力,而且可能受自然环境推力的影响。地形起伏是农村自然环境状况的重要指标。运用改进的区域地形起伏度模型、成本距离模型、重心模型,定量分析1990—2009年陕西省农村劳动力时空变化格局,结果表明：20 a间农村劳动力并非简单的持续从地形起伏高的地区往起伏低的地区移动,但地形起伏作为农村劳动力分布的重要作用因素其影响正在不断加强,并表现出进一步加强的趋势性;关中地区农村劳动力增幅较慢,体现了其快速城市化进程;陕北与陕南地形起伏度较高,陕北作为能源工业基地,其劳动力增幅快于陕南;经济因素与地形因素在整体上会拉动或推动人口格局变化,但在年尺度上表现出较强的波动性;研究区整体表现为,地形起伏越低、土地集约度越高,则区域非农化进程越快。

英文摘要：

The flow of rural labor is not only suffered economic and social tension, but also received natural founda- tion thrust. As a represent of natural environment condition, terrain is an important index in the rural. The relief de- gree of land surface （RDLS） was adopted as terrain model. And when add with the cost distance model and center of gravity model, the result was got as follows. In Shaanxi province, the rural labor force was not simply moving from the high terrain region to the low terrain region during the last 20 years. But the RDLS, which took an important role to the rural labor force distribution, was constantly strengthening on the strength. The rural labor force in Guanzhong region grew slowly,which North Shaanxi and South Shaanxi suffered a high RDLS, but as North influence and showed the trend on further reflected its rapid urbanization process;the Shaanxi was treated as the energy industry base, the number of labor there grew faster than in South Shaanxi. The economic factors and terrain factors will pull or push the overall population structure to change, but in a year scale it reflects strong volatility. The overall per- formance of the study area shows：the lower the rolling terrain, the higher the land intensive degree, and more quick- ly the region non-agricuhuralization process occurred.