Hillslope and channel contributions to the hydrologic response
Hillslope and channel contributions to the hydrologic response
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DOI：
10.1029/2002wr001708
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发表时间：
2003-05-01
影响因子：
5.4
通讯作者：
Rigon, R
中科院分区：
文献类型：
--
作者：
D'Odorico, P;Rigon, R
[1]本文提出了一个新的框架来分析在不同尺度上的水文响应的产生与渠道过程的山坡。流域响应和地貌特征的通道和山坡之间的依赖关系进行了分析，通过简单但现实的动力学假设下的旅行时间的均值和方差，并在重新缩放的宽度函数的框架内。旅行时间的分布也研究了与饱和区域的分数的变化：与饱和分数的小值，通道网络控制大部分的平均值和方差的旅行时间分布。反之亦然，当盆地饱和时，这种分布的属性可能会受到山坡过程的显著影响。这些属性也取决于盆地的大小，山坡过程的作用变得更加重要，在较小的盆地。此外，平均停留时间有关的贡献面积和排水密度，通过一个简单的表达式，这是与以前的经验法则一致。
[1] This paper develops a new framework to analyze the relevance of hillslope with respect to channel processes in the generation of the hydrologic response at different scales. The dependence between basin response and geomorphic features of channels and hillslopes is analyzed through the mean and variance of travel times under simple but realistic dynamical hypotheses and within the framework of the rescaled width function. The distribution of travel times is also studied in association with variations of the fraction of saturated areas: with small values of the saturated fraction, the channel network controls most of the mean and variance of travel time distribution. Vice versa, when the basin is saturated, the properties of this distribution may be significantly affected by hillslope processes. These properties depend also on the basin size, with the role of hillslope processes becoming more important in the smaller basins. Furthermore, the average residence time is related to contributing area and drainage density through a simple expression which is shown to be consistent with previous empirical laws.