| DOI: | 10.1002/2016GL068364
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| 论文题名: | Geomorphological significance of at-many-stations hydraulic geometry |
| 作者: | Shen C.; Wang S.; Liu X.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9099
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| EISSN: | 1944-8830
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| 出版年: | 2016
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| 卷: | 43, 期:8 | | 起始页码: | 3762
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| 结束页码: | 3770
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| 语种: | 英语
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| 英文关键词: | AMHG
; coevolution
; downstream hydraulic geometry
; geomorphology
; hydrology
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| Scopus关键词: | Geomorphology
; Hydrology
; Remote sensing
; AMHG
; At-a-station hydraulic geometries
; Co-evolution
; Coefficient of determination
; Discharge estimation
; Hydraulic geometry
; Mathematical constructs
; Predictive accuracy
; Geometry
; channel morphology
; coevolution
; convergence
; discharge
; geomorphology
; hydraulic structure
; hydrological response
; landscape evolution
; numerical method
; perturbation
; power law
; rating curve
; remote sensing
; river
; United States
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| 英文摘要: | The critically important at-a-station hydraulic geometry (AHG) relationships relate hydraulic variables (depth, width, or velocity) to discharge in power law form. The recently discovered at-many-stations hydraulic geometry (AMHG) states that AHG exponents and coefficients are strongly correlated, removing one parameter and lending AMHGs to remote sensing discharge estimation. Despite the excitement, there is an urgent need to clarify AMHG's geomorphological significance for different hydraulic variables. Using data from 57 rivers in the U.S. and perturbation experiments, we show that the width-AMHG is weak, arising mainly from the mathematical construct involving the exponent in both the regressor and the regressand. In contrast, the depth-AMHGs result from geomorphological coevolution. The similar-time-mean condition, as argued for in the literature, is sufficient but not necessary for rating curve convergence and in turn AMHG, for depth and velocity. The predictive accuracy of AMHGs, whose coefficient of determination is unit dependent, is similar to the flow percentile-based downstream hydraulic geometry. ©2016. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84964389789&doi=10.1002%2f2016GL068364&partnerID=40&md5=bdef9a31ccc92a814b19eb6ba4a8d571
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/10062
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| Appears in Collections: | 科学计划与规划
气候变化与战略
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作者单位: | Department of Civil and Environmental Engineering, Pennsylvania State University, University Park, PA, United States
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| Recommended Citation: | |
Shen C.,Wang S.,Liu X.. Geomorphological significance of at-many-stations hydraulic geometry[J]. Geophysical Research Letters,2016-01-01,43(8).
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