人为因素在沙漠化过程中作用程度的定量化研究

Quantitative Analysis on Impacts by Man-made Factors During the Process of Sandy Desertification

在沙漠化过程中，人为因素起着重要的作用，是沙漠化研究的关键问题之一。根据收集的数据资料。以黑河流域中游张掖地区为例，在1994-2000年这6年的时间尺度下，选取张掖地区沙漠化土地面积、张掖地区粮食总产量和黑河中游耗水量为指标，尝试性地来定量探讨了人为因素在黑河流域沙漠化过程中的作用。计算结果表明，人为因素在黑河流域张掖地区沙漠化过程中，所起的作用占68．5％。

Man-made factors play an important role during the sandy desertification, which are also one of many aspects in the research field of sandy desertification. Based on the data of sandy desertification area, gross yields and water consumption, the impacts by man-made factors during the process of sandy desertification are quantitatively analyzed, taking the Zhangye region in the middle reaches of Heihe River basin as an example. The study indicates that the effect of human activity is very obvious, approximately accounting for 68.5 %.