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DOI	10.2166/wcc.2018.056
	Analysis of the sediment remobilization phenomenon in a rain garden using CSTR theory
	Shao Z.; Li S.; Lv B.; Chai H.; Ao L.; Zhang X.; Li W.; He Q.
发表日期	2018
ISSN	20402244
起始页码	356
结束页码	366
卷号	9 期号:2
英文摘要	To investigate the impacts of inflow on overflow suspended solids (SS) concentration in rain gardens, field experiments were carried out in Guangming New District, Shenzhen, China. The pollutant degradation process was assumed to follow the first-order decay theory. Inflow rate and SS concentration data measured from a mild rainfall event were first used to calculate the decay constant based on the continuously stirred tank reactor (CSTR) theory, in which sediment remobilization was assumed to be negligible due to small inflow. Then, SS release rates of other rainfall events were calculated based on the known decay constant and the CSTR equations. Results show that maximum SS release rate has a strong correlation with the maximum inflow rate. Furthermore, sediment remobilization was observed in general, especially in cases of large inflow rate. Analyses show that the SS release rate is proportional to the inflow velocity. However, in the later stage of rainfall events, SS release rate drops more rapidly than the inflow velocity. This indicates the existence of a critical point, at which the inflow velocity does not have enough momentum to remobilize sediments. The study also demonstrates that small sediment particle sizes and uneven distribution of inflow could trigger sediment remobilization even with low inflow velocity. © IWA Publishing 2018.
英文关键词	Inflow rate; Low impact development; Model; Sediment remobilization
语种	英语
scopus关键词	Models; Rain; Velocity; Continuously stirred tank reactor; First-order decays; Inflow rate; Low impact development; Pollutant degradation; Remobilization; Sediment particle size; Strong correlation; Sediments; chemical reaction; correlation; garden; inflow; particle size; rainfall; remobilization; suspended sediment; China; Guangdong; Shenzhen
来源期刊	Journal of Water and Climate Change
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/148054
作者单位	Key Laboratory of Ecological Environment of Ministry of Education of Three Gorges Reservoir Area, Chongqing University, Chongqing, 400045, China; School of Urban Construction and Environmental Engineering, Chongqing University, Chongqing, 400045, China; Chongqing Municipal Research Institute of Design, Chongqing, 400000, China
推荐引用方式 GB/T 7714	Shao Z.,Li S.,Lv B.,et al. Analysis of the sediment remobilization phenomenon in a rain garden using CSTR theory[J],2018,9(2).
APA	Shao Z..,Li S..,Lv B..,Chai H..,Ao L..,...&He Q..(2018).Analysis of the sediment remobilization phenomenon in a rain garden using CSTR theory.Journal of Water and Climate Change,9(2).
MLA	Shao Z.,et al."Analysis of the sediment remobilization phenomenon in a rain garden using CSTR theory".Journal of Water and Climate Change 9.2(2018).