| DOI: | 10.1002/2015GL066014
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| 论文题名: | Climatic and landscape controls on effective discharge |
| 作者: | Basso S.; Frascati A.; Marani M.; Schirmer M.; Botter G.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9168
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| EISSN: | 1944-8899
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| 出版年: | 2015
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| 卷: | 42, 期:20 | | 起始页码: | 8441
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| 结束页码: | 8447
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| 语种: | 英语
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| 英文关键词: | effective discharge
; flow dynamics
; flow regimes
; stochastic analytical model
; streamflow variability
; suspended sediment transport
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| Scopus关键词: | Catchments
; Rivers
; Runoff
; Sediment transport
; Sedimentation
; Sediments
; Stochastic models
; Stochastic systems
; Suspended sediments
; Analytic expressions
; Effective discharge
; Flow dynamics
; Flow regimes
; Morphologic control
; Science and engineering
; Sediment rating curves
; Streamflow variability
; Stream flow
; analytical method
; climate conditions
; discharge
; landscape structure
; rating curve
; river discharge
; sediment transport
; stochasticity
; streamflow
; suspended sediment
; United States
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| 英文摘要: | The effective discharge constitutes a key concept in river science and engineering. Notwithstanding many years of studies, a full understanding of the effective discharge determinants is still challenged by the variety of values identified for different river catchments. The present paper relates the observed diversity of effective discharge to the underlying heterogeneity of flow regimes. An analytic framework is proposed, which links the effective ratio (i.e., the ratio between effective discharge and mean streamflow) to the empirical exponent of the sediment rating curve and to the streamflow variability, resulting from climatic and landscape drivers. The analytic formulation predicts patterns of effective ratio versus streamflow variability observed in a set of catchments of the continental United States and helps in disentangling the major climatic and landscape drivers of sediment transport in rivers. The findings highlight larger effective ratios of erratic hydrologic regimes (characterized by high flow variability) compared to those exhibited by persistent regimes, which are attributable to intrinsically different streamflow dynamics. The framework provides support for the estimate of effective discharge in rivers belonging to diverse climatic areas. Key Points Identification of hydrologic and morphologic controls on effective discharge Analytic expression of the ratio between effective and mean discharge Flow regime (flow variability) explains the heterogeneity of observed effective discharges © 2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84946594709&doi=10.1002%2f2015GL066014&partnerID=40&md5=5ba17ed47f908628b54bef8693b8a678
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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/8784
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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 Water Resources and Drinking Water, Eawag-Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, Switzerland
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| Recommended Citation: | |
Basso S.,Frascati A.,Marani M.,et al. Climatic and landscape controls on effective discharge[J]. Geophysical Research Letters,2015-01-01,42(20).
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