关键词: 戈壁公路, 沙源, 风场, 危害评价

Abstract: The Anxi-Jiayuguan highway is set up in the western Gansu Corridor with Gobi as the main geomorphology. In order to predict and prevent blown-sand hazards to the highway, the authors in this paper conducted field investigation, wind field calculation and blown wind observation along the highway in study area. It is difficult for sand particles to be eroded in Gobi area due to high roughness of land surface, but degraded nebkhas that distribute in the study area are the direct sand sources. The dominant sand-blowing wind is eastern wind in Anxi, and western wind in Yumen. A clear understanding of sand sources and wind direction will be helpful in designing and building the protection system of preventing blown sand hazards in the study area.

Key words: Gobi highway, sand source, wind field, hazard evoluation