GSTDTAP  > 气候变化
DOI10.1029/2020GL091015
Spectral Signature of Landscape Channelization
Milad Hooshyar; Gabriel Katul; Amilcare Porporato
2021-03-15
发表期刊Geophysical Research Letters
出版年2021
英文摘要

Channel networks increase in complexity as the importance of erosion grows compared to diffusion by soil creep, giving rise to a channelization cascade. Simulations, laboratory experiments, and data from a natural landscape are used to uncover the signature of such a cascade in the wavenumber spectrum of elevation fluctuations. Power spectra at intermediate distances from the boundaries are characterized by a peak wavenumber that is related to the quasi‐cyclic valleys superimposed on a power‐law scaling with exponent (α) at smaller scales. Dimensional analysis and self‐similarity arguments show that α is uniquely linked to the power‐law relation (with exponent m) between erosion potential and the specific drainage area via α = 2m − 3. This finding connects the spectral behavior of erosional surfaces to the exponent m that distinguishes between the steep landscapes with debris‐flow‐dominated channels and relatively flat fluvial landscapes and directly controls the shape of the channel profile.

领域气候变化
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文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/319863
专题气候变化
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GB/T 7714
Milad Hooshyar,Gabriel Katul,Amilcare Porporato. Spectral Signature of Landscape Channelization[J]. Geophysical Research Letters,2021.
APA Milad Hooshyar,Gabriel Katul,&Amilcare Porporato.(2021).Spectral Signature of Landscape Channelization.Geophysical Research Letters.
MLA Milad Hooshyar,et al."Spectral Signature of Landscape Channelization".Geophysical Research Letters (2021).
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