Sand and dirt storm disaster is such a weather which accured in the drought, simi-drought and simi-wetness areas. It is very harmful to agriculture, industry, traffic and people 's health or life in China·
Northwestern China is the heavy sand and dirtstorm disasterarea.In history, sand and dirtstorm often occurred.Since 1950 s,the strong and supper strong sand and dirtstorm increased and centralized in the region of Nort hern Gansu to center of Mongolia and Ningxia, Eastern Xinjiang to Northern Gansu, and The Basin of Tulufan of Xinjiang.Their ex: isting should be the climate, surface, water, society and so on.Upon the features, distribution and origin of the sand and dirtstorm disaster occurred in China, the corresponding prevent ion coun-termeasures have been raised.