关键词: 自然环境, 沙尘暴, 影响, 对策建议

Abstract: We have investigated and analyzed the situation about sandstorm happing from 1961 to 2000 and natural environment in northern Ningxia. It was revealed that the spatial distribution of sandstorm weather was mainly influenced by regional terrain, geomorphology and sand-source; the declining trend of sandstorm weather in study region had direct relation with human activities besides with the climate characters of different decade. After 1990 the desertification was controlled and the sandlot shrank in northern Ningxia as effect of increasing afforesting and constituting forest shelter belts. Even if the gale times kept normal or even a little stronger, the present situation of sandstorm decreasing and the threshold of sand-blowing wind increasing indicated that artificially modifying the surface environment and making the surface coarseness increase are effective to restrain local sandstorm. So, the key countermeasures for controlling sandstorm are environmental management and protection.

Key words: natural environment, sandstorm, influence, countermeasure and suggestion