Change of fluvial sediment transport rates after a high magnitude debris flow event in a drainage basin in the Northern Limestone Alps, Germany
Change of fluvial sediment transport rates after a high magnitude debris flow event in a drainage basin in the Northern Limestone Alps, Germany
复制标题
德国北阿尔卑斯山石灰岩流域发生大规模泥石流事件后河流沉积物输送速率的变化
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发表时间：
2004
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影响因子：
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通讯作者：
M. Becht
中科院分区：
文献类型：
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作者：
F. Haas;T. Heckmann;V. Wichmann;M. Becht
本文研究了德国北方石灰岩阿尔卑斯山流域泥石流对河流泥沙输移的影响。2002年的一次大暴雨引发了几次斜坡和渠道的泥石流。自2000年以来，研究区Lahnenwiesgraben的小通道中的泥沙输运每周定量显示，泥石流事件后，由于通道床中极高的泥沙动员，泥沙产量急剧增加。调查表明，泥石流造成的侵蚀和沉积也影响到长期的河流沉积物收支。泥石流改变了河流地貌系统的状态，并引起长期的高河流泥沙输运。也可能改变所输送沉积物的组成（有机物含量、粒度测定）。地貌过程的相互作用是模拟沉积物收支和地貌发展的一个重要问题。
This paper deals with the influence of debris flows on fluvial sediment transport in a drainage basin in the Northern Limestone Alps, Germany. A high magnitude rainstorm event in the year 2002 triggered several debris flows on slopes and in channels. Weekly quantification of the sediment transport in small channels in the study area Lahnenwiesgraben since the year 2000, show a drastic increase in sediment yield after the debris flow event due to extremely high sediment mobilization in the channel beds. The investigations show that erosion and deposition by debris flows also affect the long-term fluvial sediment budget. Debris flows change the state of the fluvial geomorphic system and induce prolonged high fluvial sediment transport. The composition of the transported sediment (organic content, granulometry) may also be modified. The interaction of geomorphic processes is an important issue in modelling sediment budgets and landform development.