The effect of source suspended sediment concentration on the sediment dynamics of a macrotidal creek and salt marsh

doi:10.1016/j.csr.2017.08.017

	The effect of source suspended sediment concentration on the sediment dynamics of a macrotidal creek and salt marsh
	Poirier, Emma 1; van Proosdij, Danika 1; Milligan, Timothy G.2
刊名	CONTINENTAL SHELF RESEARCH
	2017-09-15
卷号	148 页码:130-138
关键词	Sediment dynamics Flocculation Suspended sediment concentration Salt marsh Ecomorphodynamics Bay of Fundy
ISSN号	0278-4343
DOI	10.1016/j.csr.2017.08.017
英文摘要	Seasonal variability in the sediment dynamics of a Bay of Fundy tidal creek and salt marsh system was analyzed to better understand the ecomorphodynamics of a high suspended sediment concentration intertidal habitat.Data we recollected over 62 tides for velocity , suspended sediment concentration, deposition , and grain size at four stations from the creek thalweg to the marsh surface. Five topographic surveys were also conducted throughout the 14-month study. Deposition rates per tide varied spatially from 56.4 g m(-2) at the creek thalweg to 15.3 g m(-2) at the marsh surface. Seasonal variations in deposition in the creek and marsh surface were from 38.0 g m(-2) to 97.7 g m(-2) and from 12.2 g m(-2) to 19.6 g m(-2) respectively . Deposition and erosion were greatest in late fall and winter. This seasonal change, led by higher suspended sediment concentrations, was observed in the creek and at the marsh bank but not ably absent from the marsh edge and marsh surface. Sediments were predominantly deposited in floe form (76-83%). Because of high floe content, higher suspended sediment concentrations led to more rapid loss of sediment from suspension. With increasing sediment concentration, deposition increased in the tidal creek and at the marsh bank but not at the marsh edge or marsh surface. This suggests that in highly flocculated environments the water column clears fast enough that very little sediment remains in suspension when the water reaches the marsh and that the sediment concentration during marsh inundation is in dependent of the initial concentration in the creek.
资助项目	Canadian Foundation for Innovation, Nova Scotia Innovation Fund[12846] ; Canadian Foundation for Innovation, Nova Scotia Innovation Fund[15171]
WOS研究方向	Oceanography
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000413877700011
内容类型	期刊论文
源URL	[http://ir.fio.com.cn/handle/2SI8HI0U/3082]
专题	自然资源部第一海洋研究所
作者单位	1.St Marys Univ, Dept Geog & Environm Studies, 923 Robie St, Halifax, NS B3H 3C3, Canada; 2.Fisheries & Oceans Canada, Bedford Inst Oceanog, 1 Challenger Dr, Dartmouth, NS B2Y 4A2, Canada
推荐引用方式 GB/T 7714	Poirier, Emma,van Proosdij, Danika,Milligan, Timothy G.. The effect of source suspended sediment concentration on the sediment dynamics of a macrotidal creek and salt marsh[J]. CONTINENTAL SHELF RESEARCH,2017,148:130-138.
APA	Poirier, Emma,van Proosdij, Danika,&Milligan, Timothy G..(2017).The effect of source suspended sediment concentration on the sediment dynamics of a macrotidal creek and salt marsh.CONTINENTAL SHELF RESEARCH,148,130-138.
MLA	Poirier, Emma,et al."The effect of source suspended sediment concentration on the sediment dynamics of a macrotidal creek and salt marsh".CONTINENTAL SHELF RESEARCH 148(2017):130-138.