中文摘要：

沙尘暴的发生与沙尘暴源地的下垫面状况密不可分,下垫面要素中土壤紧实度等地表状况指标是沙尘暴灾害下垫面因子的危险度研究的重要内容。选取沙尘暴源地的内蒙古中西部地区为研究区域,于2004年4月进行了土壤紧实度实地采样,对获取的36个采样点的数据进行了统计分析,发现在不同的植被覆盖类型下,地表的土壤紧实度值具有明显的分异特征和分布范围。以1∶10万的内蒙古土地利用类型图为依托进行重分类,对研究区域的土壤紧实度值进行空间上的了反演。并通过2009年第二次实地采样对该反演的精度进行了验证,排除干扰因素后,发现土壤紧实度的反演结果良好,因此可以获得空间范围上土壤紧实度的一个粗略范围值。研究结果可为日后进行土壤紧实度对沙尘暴的影响和贡献等级划分以及沙尘暴下垫面脆弱性风险评估和区划提供数据支持。

英文摘要：

The occurrence of dust storms is inseparably connected with the underlying surface conditions of dust source region.Elements of the underlying surface such as soil compaction are important factors in the study on hazard degree of underlying surface in dust storm＇s source region.In this paper,the authors chose western and central Inner Mongolia,which is one of the dust storm＇s source regions,as observation area.The samples of soil compaction were got in April 2004.After the statistical analysis of the sample data from 36 sites,we found that under differential land use types,the surface soil compaction value has significantly differential characteristics and distribution.After the reclassification of Inner Mongolia land use type map（1：100000）,we made the space inversion of soil compaction value in study area and verified the inversion accuracy by the data from second sampling.Then we find the inversion of soil compaction has satisfactory results after eliminating interference factors.So we can get the soil compaction values with rough extent in spatial range.The study in this paper will provide a useful reference for the future work on classification of influence and contribution of soil compact and risk assessment and zoning of vulnerability of underlaying surface in dust storm hazard.