期刊
GEOPHYSICAL RESEARCH LETTERS
卷 37, 期 -, 页码 -出版社
AMER GEOPHYSICAL UNION
DOI: 10.1029/2009GL040851
关键词
-
资金
- NSF [EAR 06-17557, EAR 08-23953]
A simple model of topographic ridge evolution is developed in which mass-wasting is treated as a vectorial erosion process. Channel incision drives backcutting as well as downcutting of the connected hillslope and the result is a mobile drainage divide that exhibits sustained horizontal and vertical motions mediated by asynchronous, asymmetric channel incision rates. The model resolves a ridge cross-section into coupled hillslope and channel links and the model equations are found to form a low dimensional, non-linear dynamical system. For weak forcing of hillslope erosion the system converges to a stable, symmetric geometry, but for strong forcing a limit cycle arises and the divide oscillates back and forth over time. The lessons to draw from this model are that such low-dimensional dynamical behavior: (i) may explain the sinuous planform of interfluves; (ii) may form a key constituent of the high-dimensional dynamics of landscape evolution as a whole. Citation: Stark, C. P. (2010), Oscillatory motion of drainage divides, Geophys. Res. Lett., 37, L04401, doi:10.1029/2009GL040851.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据