沙尘暴是我国北方经常发生的灾害性天气 ,且近年来发生频率增加 ,尤其是今年春季沙尘暴次数多、强度大 ,对国民经济造成重大损失。沙尘暴的发生需要大风、裸露的沙土质地表及不稳定的气流三者结合 ,但由于人类不合理的经济活动造成荒漠化的发展也是沙尘暴加剧的重要原因 ,因此 ,我们在西部大开发中一定要重视生态环境的保护和建设 ,保持这一地区的可持续发展。

Sandstorm is a frequently occurred disastrous weather in northern China and occurred frequently in recent years with increase in disaster-affected area and loss. West China is an important source place of sandstorms, and the marginal area of the Tarim Basin, Hexi Corridor and Alxa Plateau are three important standstorm centers. Sometimes sandstorm affected area is very extensive and Beijing was hit by eight sandstorm events in last spring and caused great loss in national economy. The combination of strong wind, exposed sandy soil on ground surface and unstable air current constitutes the necessary conditions for the sandstorms. However, the accelerated desertification process resulting from irrational human economic activities is responsible for the accelerated sandstorms. Facts proved that in places where desertification was well managed and controlled and eco environment was well protected, then sandstorm intensity reduced and loss mitigated. Otherwise, natural environment would be devastated, desertification expanded and sandstorm aggrevated, sandstorm has sounded a warning on ecology. Eco environment in western regions of China is very vulnerable, so to strengthen eco environmrntal protection and rehabilitation should be taken as a core issue and a pressing task. Efforts should be made to put prevention first and give priority to protectionso as to bring eco environment in west China to develop toward benign circulation and maintain sustainable development of these regions.