| DOI: | 10.1002/2015GL065980
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| 论文题名: | Sediment transport-based metrics of wetland stability |
| 作者: | Ganju N.K.; Kirwan M.L.; Dickhudt P.J.; Guntenspergen G.R.; Cahoon D.R.; Kroeger K.D.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8568
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| EISSN: | 1944-8299
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| 出版年: | 2015
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| 卷: | 42, 期:19 | | 起始页码: | 7992
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| 结束页码: | 8000
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| 语种: | 英语
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| 英文关键词: | sediment transport
; tidal wetlands
; wetland stability
; wetland vulnerability
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| Scopus关键词: | Floods
; Sea level
; Sediment transport
; Sedimentation
; Sediments
; Tides
; Wetlands
; Derived materials
; Organic-inorganic
; Sediment availability
; Spatiotemporal variability
; Suspended sediment concentrations
; Tidal wetlands
; Vulnerability assessments
; Vulnerability metrics
; Suspended sediments
; accretion
; coastal wetland
; concentration (composition)
; marsh
; sea level change
; sediment transport
; spatiotemporal analysis
; stable isotope
; survival
; suspended sediment
; vulnerability
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| 英文摘要: | Despite the importance of sediment availability on wetland stability, vulnerability assessments seldom consider spatiotemporal variability of sediment transport. Models predict that the maximum rate of sea level rise a marsh can survive is proportional to suspended sediment concentration (SSC) and accretion. In contrast, we find that SSC and accretion are higher in an unstable marsh than in an adjacent stable marsh, suggesting that these metrics cannot describe wetland vulnerability. Therefore, we propose the flood/ebb SSC differential and organic-inorganic suspended sediment ratio as better vulnerability metrics. The unstable marsh favors sediment export (18 mg L-1 higher on ebb tides), while the stable marsh imports sediment (12 mg L-1 higher on flood tides). The organic-inorganic SSC ratio is 84% higher in the unstable marsh, and stable isotopes indicate a source consistent with marsh-derived material. These simple metrics scale with sediment fluxes, integrate spatiotemporal variability, and indicate sediment sources. Key Points Suspended sediment concentration (SSC) and accretion are not indicators of marsh stability Flood-ebb SSC differential is a suitable indicator of sediment transport direction Organic to inorganic SSC ratio is an indicator of relative marsh degradation © 2015. The Authors. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84947031849&doi=10.1002%2f2015GL065980&partnerID=40&md5=d07b55e5626dec28e3345956362ed49c
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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/8184
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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: | Woods Hole Coastal and Marine Science Center, U.S. Geological Survey, Woods Hole, MA, United States
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| Recommended Citation: | |
Ganju N.K.,Kirwan M.L.,Dickhudt P.J.,et al. Sediment transport-based metrics of wetland stability[J]. Geophysical Research Letters,2015-01-01,42(19).
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