DOI: 10.1007/s10584-017-1954-8
Scopus记录号: 2-s2.0-85018823632
论文题名: How can climate change and engineered water conveyance affect sediment dynamics in the San Francisco Bay-Delta system?
作者: Achete F. ; Van Der Wegen M. ; Roelvink J.A. ; Jaffe B.
刊名: Climatic Change
ISSN: 0165-0009
EISSN: 1573-1480
出版年: 2017
卷: 142, 期: 2018-03-04 起始页码: 375
结束页码: 389
语种: 英语
Scopus关键词: Budget control
; Dynamics
; Ecology
; Ecosystems
; Embankments
; Estuaries
; Fluid dynamics
; Hydrodynamics
; Levees
; Sea level
; Sedimentation
; Sediments
; Suspended sediments
; Engineering measures
; Fine sediment dynamics
; Habitat conditions
; Mitigation measures
; Primary production
; Process-based modeling
; Sediment suspension
; Suspended sediment concentrations
; Climate change
; anthropogenic effect
; climate change
; concentration (composition)
; ecosystem dynamics
; estuarine dynamics
; hydrodynamics
; model validation
; primary production
; sea level change
; suspended sediment
; watershed
; California
; San Francisco Bay
; United States
英文摘要: Suspended sediment concentration is an important estuarine health indicator. Estuarine ecosystems rely on the maintenance of habitat conditions, which are changing due to direct human impact and climate change. This study aims to evaluate the impact of climate change relative to engineering measures on estuarine fine sediment dynamics and sediment budgets. We use the highly engineered San Francisco Bay-Delta system as a case study. We apply a process-based modeling approach (Delft3D-FM) to assess the changes in hydrodynamics and sediment dynamics resulting from climate change and engineering scenarios. The scenarios consider a direct human impact (shift in water pumping location), climate change (sea level rise and suspended sediment concentration decrease), and abrupt disasters (island flooding, possibly as the results of an earthquake). Levee failure has the largest impact on the hydrodynamics of the system. Reduction in sediment input from the watershed has the greatest impact on turbidity levels, which are key to primary production and define habitat conditions for endemic species. Sea level rise leads to more sediment suspension and a net sediment export if little room for accommodation is left in the system due to continuous engineering works. Mitigation measures like levee reinforcement are effective for addressing direct human impacts, but less effective for a persistent, widespread, and increasing threat like sea level rise. Progressive adaptive mitigation measures to the changes in sediment and flow dynamics resulting from sea level rise may be a more effective strategy. Our approach shows that a validated process-based model is a useful tool to address long-term (decades to centuries) changes in sediment dynamics in highly engineered estuarine systems. In addition, our modeling approach provides a useful basis for long-term, process-based studies addressing ecosystem dynamics and health. © Springer Science+Business Media Dordrecht 2017. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/84021
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: Department of Coastal Engineering and Port Development, UNESCO-IHE, PO Box 3015, Delft, Netherlands; Deltares, Boussinesqweg 1, P.O. Box 177, Delft, Netherlands; Deltares, P.O. Box 177, Delft, Netherlands; Technical University Delft, Stevinweg 1, Delft, Netherlands; U.S. Geological Survey Center, 400 Natural Bridges Drive, Santa Cruz, CA, United States
Recommended Citation:
Achete F.,Van Der Wegen M.,Roelvink J.A.,et al. How can climate change and engineered water conveyance affect sediment dynamics in the San Francisco Bay-Delta system?[J]. Climatic Change,2017-01-01,142(2018-03-04)