| DOI: | 10.1002/2014GL061666
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| 论文题名: | Modeling vegetation controls on fluvial morphological trajectories |
| 作者: | Bertoldi W.; Siviglia A.; Tettamanti S.; Toffolon M.; Vetsch D.; Francalanci S.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9681
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| EISSN: | 1944-9412
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| 出版年: | 2014
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| 卷: | 41, 期:20 | | 起始页码: | 7167
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| 结束页码: | 7175
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| 语种: | 英语
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| 英文关键词: | fluvial geomorphology
; numerical modeling
; riparian vegetation
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| Scopus关键词: | Groundwater
; Nonlinear feedback
; Numerical models
; Rivers
; Sediment transport
; Sensitivity analysis
; Equilibrium configuration
; Fluvial geomorphology
; Riparian vegetation
; Species composition
; Theoretical framework
; Vegetation control
; Vegetation pattern
; Water availability
; Vegetation
; biomass
; fluvial geomorphology
; growth rate
; morphodynamics
; numerical model
; riparian vegetation
; river bed
; vegetation structure
; water availability
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| 英文摘要: | The role of riparian vegetation in shaping river morphology is widely recognized. The interaction between vegetation growth and riverbed evolution is characterized by complex nonlinear feedbacks, which hinder direct estimates of the role of key elements on the morphological evolutionary trajectories of gravel bed rivers. Adopting a simple theoretical framework, we develop a numerical model which couples hydromorphodynamics with biomass dynamics. We perform a sensitivity analysis considering several parameters as flood intensity, type of vegetation, and groundwater level. We find that the inclusion of vegetation determines a threshold behavior, identifying two possible equilibrium configurations: unvegetated versus vegetated bars. Stable vegetation patterns can establish only under specific conditions, which depend on the different environmental and species-related characteristics. From a management point of view, model results show that relatively small changes in water availability or species composition may determine a sudden shift between dynamic unvegetated conditions to more stable, vegetated rivers. Key Points We developed a model coupling flow, sediment transport, and vegetation dynamicsWe quantified the transition from unvegetated to vegetated configurationsEvolution is affected by changes in water availability and species composition ©2014. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84911399189&doi=10.1002%2f2014GL061666&partnerID=40&md5=68a39ef045493d4b0a9302ab7c36ddc6
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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/6945
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Department of Civil, Environmental and Mechanical Engineering, University of Trento, Trento, Italy
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| Recommended Citation: | |
Bertoldi W.,Siviglia A.,Tettamanti S.,et al. Modeling vegetation controls on fluvial morphological trajectories[J]. Geophysical Research Letters,2014-01-01,41(20).
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