“五·五”特大风沙尘暴的形成过程及防治对策

The Course, Cause of Formation, and Cure and Protection of The Dust—storm on The Fifth, May

1993年5月5日特大风沙尘暴席卷中国西北大部分地区,造成直接经济损失约5.6亿元,人员伤亡惨重。系统性锋面大风天气过程与地形效应相互作用,是产生此次特大风沙尘暴的动力条件;人为破坏地表结构,丰富了沙尘源,是加强和诱发此次特大风沙尘暴的最重要因素。据此,提出以防为主,辅之以预警系统;提倡耕地集约化经营;同时加强风沙尘暴形成机理研究的防治设想。

In the part area of north—west China, the strong dust—storm took place on the fifth, May. This natural calamity Caused enormous Losses, the direct economy loss about 0. 56 billion yuan, 67 persons died off. According to previous studies and this calamity investigation, the interaction between frontal weather system and large scale landform is the cause of formation of strong wind, ecologic systerm imbalance aggravate the dust—storm. Finally, the Surggestion are given: (1)Protection is the main method. (2) Building monitor and warning system. (3) Strenthening study on theory of formation of dust—storm.