关键词: 沙尘暴, 起因, 防治对策

Abstract: This paper dealt with the damages, causes and countermeasures of strong sandstorms occurred on 20-23 April and 5-6 May 1993 in Ningxia and Alxa League,Inner Mongolia. These sandstorms have caused great economic loss in the above-mention regions. The formation causes of sandstorm can be divided into natural factors and man-made factors. The former mainly refers to the south-eastward migration of Siberian cold air-mass which lifts up large amount of finer surface material, while the latter include irrational land use. At present,man still cannot control the weather. Therefoer, the main countermeasures to control sandstorm should be placed on anthroupogenic factors,such as protection of existing vegetation and strengthening establishment of vegetation, which will weaken wind force and reduce the occurrence of sandstorms.