荒漠化地区生态安全评价和防治是国内外学者研究的焦点。以甘肃省石羊河流域为例, 构建了生态安全指标体系, 进行了生态安全评价, 提出了荒漠化防治的措施和建议。结果表明:石羊河流域生态安全居中, 北部地区较差, 绿洲面积、经济发展和水资源利用是影响流域生态安全的主要因素;自然因素和人为因素是流域生态安全和荒漠化现状的主要驱动力。为甘肃省其他地区的生态安全和荒漠化防治提供理论依据和参考。

The evaluation of ecological security and controlling of desertification are focus of domestic and overseas researchers.In the paper, with the Shiyanghe valley of Gansu as an example, indexes of ecological security were const ructed, the ecological security was evaluated, and countermeasures of controlling desertification were put forw ard.Result s show that the ecological security of Shiyanghe valley was at a moderate level, that of the north of valley was w orse, and the area of oasis, economic development, utilization of water resources were main factors affecting the valley ecologcial security, and the natural and human factors were primary drivers of valley ecological security and desert ification.This paper is aimed at providing some theorical basis and reference to other regions of Gansu in terms of ecological security and desertification combating.