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地理科学  2006 

2003年中国西南山区典型灾害性暴雨泥石流运动堆积特征

, PP. 701-705

Keywords: 泥石流,运动,堆积,灾害

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Abstract:

2003年发生在中国西南山区的大规模泥石流为典型的灾害性暴雨泥石流,造成了巨大的经济损失和人员伤亡。作者实地考察其中7条造成较大损失的典型泥石流沟,分析得出,这一地区泥石流的流速一般都比较大,流量变化也比较大,流量大小与流域面积相关,总体上流量随流域面积的增大有增加的趋势,但流量与面积并非正相关关系。同时,在这些流域的堆积物的组成中,粗大颗粒极多,最大的颗粒普遍比较大,另外漂石含量很高。粘性泥石流中砾石含量相对于中国西南山区其它粘性泥石流较低,砂砾含量相对较高,大部分泥石流堆积物的有效粒径(d10)。

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