DOI: 10.1029/2017JF004503
Scopus记录号: 2-s2.0-85046766066
论文题名: Anthropogenic Modifications Can Significantly Influence the Local Mean Sea Level and Affect the Survival of Salt Marshes in Shallow Tidal Systems
作者: Silvestri S. ; D'Alpaos A. ; Nordio G. ; Carniello L.
刊名: Journal of Geophysical Research: Earth Surface
ISSN: 21699003
出版年: 2018
卷: 123, 期: 5 起始页码: 996
结束页码: 1012
语种: 英语
英文关键词: hydrodynamics
; local mean sea level
; morphological modifications
; salt marsh morphodynamics
Scopus关键词: anthropogenic effect
; hydrodynamics
; intertidal environment
; morphodynamics
; saltmarsh
; sea level change
; shallow water
; survival
; Italy
; Veneto
; Venezia [Veneto]
; Venice Lagoon
英文摘要: In a shallow dissipative tidal system, interventions that modify the local morphology in one location of the basin may quickly affect the surrounding areas, promoting strong changes in their morphology. If the localized modification persists over time, it may produce far-field morphological modifications at delayed times. These modifications may have an impact on the local mean sea level and on tidal range, affecting the fate of salt marshes with implications for their survival. In this study, we investigate the effect of two anthropic interventions performed between the end of the nineteenth century and the beginning of the twentieth century in the northern Venice lagoon (Italy): the construction of jetties at one inlet and the removal of reed barriers protecting a fish farm in the inner lagoon. Using a 2-D numerical model to reproduce the hydrodynamics of different historical lagoon configurations and a zero dimensional model of marsh vertical accretion, we investigate the effect of these interventions on the salt marshes of the northern lagoon basin. Interestingly, our results show that the increased depth at the inlet induced by the jetties lowered the local mean sea level of nearby areas and increased the tidal range, producing a temporary positive feedback on the stability of the marshes in proximity of the inlet. On the contrary, in the inner lagoon areas characterized by extremely low marshes, the removal of reed barriers delimiting a fish farm may have reduced the sediment fluxes thus contributing to the drowning of large marsh surfaces. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113938
Appears in Collections: 气候减缓与适应
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作者单位: Dipartimento TESAF, Universitá di Padova, Padua, Italy; Nicholas School of the Environment, Duke University, Durham, NC, United States; Dipartimento di Geoscienze, Università di Padova, Padua, Italy; Dipartimento ICEA Ingegneria Civile, Edile e Ambientale, Università di Padova, Padua, Italy
Recommended Citation:
Silvestri S.,D'Alpaos A.,Nordio G.,et al. Anthropogenic Modifications Can Significantly Influence the Local Mean Sea Level and Affect the Survival of Salt Marshes in Shallow Tidal Systems[J]. Journal of Geophysical Research: Earth Surface,2018-01-01,123(5)