Landform - Structure, Evolution, Process Control
Landform - Structure, Evolution, Process Control
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地形 - 结构、演化、过程控制
DOI：
10.1007/978-3-540-75761-0_11
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
Warburton J
中科院分区：
文献类型：
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作者：
Warburton J
河源集水区被视为活跃的地貌环境，产生大量的沉积物，然而，在这样的设置很少进行直接测量。本章使用一系列详细的短期沉积物收支研究评估了英国高地陡集水区的沉积物供应和转移动态。它表明，在这些集水区的泥沙转移是相对低效的，高速率的侵蚀和泥沙输运只表现在当地规模。沉积物的产生是间歇性的，往往与极端降雨事件有关。低泥沙通量通常是由于斜坡和渠道之间的耦合差;和源头和低地泥沙系统。它的结论是，了解高地沉积物系统需要进行嵌套尺度连接源头和山谷沉积物系统的全组分沉积物预算。
Headwater catchments have been viewed as active geomorphic environments which generate high sediment yields, however, direct measurements in such settings are rarely undertaken. The dynamics of sediment supply and transfer in steep, UK upland catchments are assessed in this chapter using a series of detailed short-term sediment budget studies. It is demonstrated that sediment transfer in these catchments is relatively inefficient and high rates of erosion and sediment transport only manifest themselves at the local scale. Sediment yields are episodic and often associated with extreme rainfall events. Low sediment fluxes are usually the result of poor coupling between slopes and channels; and headwater and lowland sediment systems. It is concluded that the understanding of upland sediment systems requires full-component sediment budgets carried out at nested scales which link headwater and valley sediment systems.