Wang Jing, He Ting, Guo Xudong, Liu Aixia, Zhou Qing
Key Laboratory of Land Use, Ministry of Land and Resources, Beijing 100035, China.
Environ Monit Assess. 2006 Oct;121(1-3):109-25. doi: 10.1007/s10661-005-9110-8. Epub 2006 Jun 7.
The area northwest of Beijing is one of the most important regions where many organizations invest and pay most attention. The environmental problems in this region affect not only Beijing but also the surrounding area. Based on observation of the characteristics of the change in sandy land, this study classified four types of dynamic change of sandy land, including extended sandy land, the reversely changed sandy land, the potential sandy land and no change in sandy land. Then the process and the trend of changes in sandy land and their environmental impact on the area northwest of Beijing were analyzed. The results show that the area of sandy land has increased in this region in the period of 1991 to 2002. Change between sandy land and grassland was the dominant change. It is found that the monitoring zones of Hunshandake sandy land and north of Yin Shan are regions with high ratio of extended sandy land, and are connected with widespread potential change of sandy land. This implies that these two regions have a high probability of increase in sandy land in the future. On the other hand, in the monitoring zone of Horqin sandy land and Ba Shang Plateau and its surrounding area, desertification had been controlled and the area of sandy land is expected to decrease. This indicates that the direction of the sandstorm to Beijing is expected to gradually move to the northwest. Furthermore, the decreases in sandy land and the reversing change from arable land to grassland and forests in the study region will affect the land quality and atmosphere. And the logistic multiple regression (LMR) model was employed to better understand the complexity and processes of increases in sandy land. This model predicts that there is a high probability of increases in sandy land in north of Siziwang Banner, Zhengxiangbai Banner and Zhenglan Banner. Finally, suggestions to the ecological construction of the study area have been proposed.
北京西北部地区是众多机构投资和最为关注的重要区域之一。该地区的环境问题不仅影响北京，还波及周边地区。基于对沙地变化特征的观测，本研究将沙地的动态变化分为四种类型，包括沙地扩展、沙地逆向变化、潜在沙地和沙地无变化。然后分析了北京西北部地区沙地变化的过程、趋势及其环境影响。结果表明，1991年至2002年期间该地区沙地面积有所增加。沙地与草地之间的变化是主要变化类型。研究发现，浑善达克沙地和阴山北部的监测区域是沙地扩展比例较高的地区，且与广泛的潜在沙地变化相关联。这意味着这两个地区未来沙地面积增加的可能性较大。另一方面，在科尔沁沙地和坝上高原及其周边地区的监测区域，荒漠化得到了控制，沙地面积有望减少。这表明沙尘暴影响北京的方向预计将逐渐向西北转移。此外，研究区域内沙地面积的减少以及耕地向草地和森林的逆向变化将影响土地质量和大气。并且采用逻辑多元回归（LMR）模型来更好地理解沙地增加的复杂性和过程。该模型预测，四子王旗北部、正镶白旗和正蓝旗沙地增加的可能性很大。最后，针对研究区域的生态建设提出了建议。
