Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL074198 |
What controls channel form in steep mountain streams? | |
Palucis, M. C.; Lamb, M. P. | |
2017-07-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:14 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Steep mountain streams have channel morphologies that transition from alternate bar to step-pool to cascade with increasing bed slope, which affect stream habitat, flow resistance, and sediment transport. Experimental and theoretical studies suggest that alternate bars form under large channel width-to-depth ratios, step-pools form in near supercritical flow or when channel width is narrow compared to bed grain size, and cascade morphology is related to debris flows. However, the connection between these process variables and bed slope-the apparent dominant variable for natural stream types-is unclear. Combining field data and theory, we find that certain bed slopes have unique channel morphologies because the process variables covary systematically with bed slope. Multiple stable states are predicted for other ranges in bed slope, suggesting that a competition of underlying processes leads to the emergence of the most stable channel form. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000407790500018 |
WOS关键词 | SEDIMENT TRANSPORT ; REACH MORPHOLOGY ; FLOW RESISTANCE ; BED MORPHOLOGY ; ERODIBLE-BED ; DEBRIS FLOWS ; ROUGHNESS ; ORIGIN ; POOLS ; HYDRODYNAMICS |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
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/26379 |
专题 | 气候变化 |
作者单位 | CALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125 USA |
推荐引用方式 GB/T 7714 | Palucis, M. C.,Lamb, M. P.. What controls channel form in steep mountain streams?[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(14). |
APA | Palucis, M. C.,&Lamb, M. P..(2017).What controls channel form in steep mountain streams?.GEOPHYSICAL RESEARCH LETTERS,44(14). |
MLA | Palucis, M. C.,et al."What controls channel form in steep mountain streams?".GEOPHYSICAL RESEARCH LETTERS 44.14(2017). |
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