中文摘要：

为了探讨机械防护体系人工防护工作停止后，公路路面沙害的形成和发育过程，分别于2003年和2007年对塔中地区一段井场路的路面沙害进行了实地测量和卫片室内量测，研究发现在塔克拉玛干沙漠公路复合型纵向沙垄区段，公路芦苇机械防沙体系极度衰竭后，路面沙害情势变化呈现一定的规律性：（1）2003年-2007年四年间公路沙害发展迅速，路面沙害程度进一步加重。路面沙害路段长度以年均2％的比例增加，沙害路段数也快速增加；路面沙害面积以每年平均10％的面积比例快速发展；沙丘前移压埋类型发展速度明显高于积沙类型。（2）沙垄区路面沙害发生频率和路面沙害程度的发展速率要远高于垄间区，在沙垄区次级地貌单元中，垄顶〉背风坡〉迎风坡；各地貌部位的沙丘前移压埋类型发展速率高于积沙类型。（3）路风夹角在83°-89°之间的路段沙害演化速率最大，其他小夹角沙害演化规律不明显；路面沙害强度的发展速率与路风夹角的关系不明显。

英文摘要：

To investigate the evolutionary process of sand drift disaster on road under the condition of manual work stopping, sand disaster on a segment of desert highway was measured by field survey in 2003 and satellite images analysis in 2007, respectively. The study area is located in the Tazhong Station in the complex dune-chains of the Taklimakan Desert. Sand drift disasters on road surface have significant evolutionary features after the straw-breaks along the highway on the area of complex dune-chains in the hinterland of the Taklimakan Desert. The research results show that： （1） Sand drift disasters on road surface have fast been expanded, its intensity also become higher during 2003 and 2007. The length of sand drift disasters was increased in the ratio of 2% per year, and the number of sand disasters was also increased intensively; the area of sand disasters was increased in the ratio of 10% per year; the evolutionary velocity of mobile dune burying was higher than that of sand deposition accumulation. （2） The evolutionary velocity of occurring frequencies and intensity of sand drift disasters was higher in the region with dune-chains than that in the inter-dune-chains region, and that on the top of dune-chains was higher than that on the windward slopes and leeward slopes. The evolutionary velocity of mobile dune burying was higher than that of sand deposition accumulation in all morphologic sections. （3） The evolutionary velocity of sand drift disasters was largest in the areas where the angles between the road alignment and the prevailing wind direction was between 83° -89°,the evolutionary law of other angles was not significant. The relationship between the evolutionary velocity of its intensity and angles was not obvious.