中文摘要：

从泥石流体流变特性的分析入手，深入地探讨了蒋家沟泥石流阵性流的淤积和冲刷特征。其冲淤变化特征与泥石流体的浓度特性和规模大小的发展过程有很大的关系。根据这些分析，可以将泥石流的危害划分为侵蚀和堆积两大类，并可能进一步完善泥石流危险度的评估。

英文摘要：

Proceeding from rheologieal properties of debris flow, the erosion deposit properties of debris flow surges in Jiangjia Ravine are discussed. The change of erasion-deposit properties is relative to developing process of concentration and scale of debris flow body. Therefore, the hazard of debris flows can be divided into two kinds of erosion and deposit and the assessment of its hazard .degree-can be perfected by these analyses.