“ 93.5”大风沙暴灾情、成因与防治措施

1993年5月我国西北地区的大风沙暴,面积大、持续时间长,局部还出现了霜、雪、雹等灾害,造成了重大的经济损失。究其原因,除大气运行外,主要是地面裸露,地表多为易被风力吹蚀的沙粒粉尘,加之干热的气候、强烈的辐射和干燥的地表加剧了大风沙暴的危害。只有做好地面保护工作才能够较快地减小风沙灾害。首先是贯彻水土保持法“预防为主”的方针,保护好现有植被,其次是采取沙障固沙、植物固沙、引水拦沙等治理措施。

Informational digital diagrams applied to predict spring wind,snow,and sandstorms

Using informational digital diagrams, we analyzed the snow event that occurred on Feb 26, 2006 and the sandstorm on Apr 11, 2006 in Xi＇an. Results indicate that, under similar weather circumstances, different events evidently exhibit unique vertical structure features. Informational digital diagrams provide a method for transitional weather prediction, a problem for present extrapolative analysis system.