Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020GL091015 |
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 |
URL | 查看原文 |
引用统计 | |
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 |
推荐引用方式 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). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论