Distribution of phosphorus in bed sediment at confluences responding to hydrodynamics

IF 1.1 4区 工程技术 Q3 ENGINEERING, CIVIL
Yang Xiao, Yang Xia, Saiyu Yuan, Hongwu Tang
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引用次数: 6

Abstract

Knowledge of the distribution of contaminants at channel confluences is critical for understanding their transport and dwelling at river networks where flow confluences constitute the key nodes. Flume experiments were conducted to study the distribution of phosphorus adsorption in surface sediment under complex hydrodynamics at channel confluences. The influence of the discharge ratio of the tributary discharge to the main stream discharge was also investigated. The results showed that the horizontal velocity and vertical velocity of flow are the dominant factors affecting the distribution of phosphorus adsorption. Flows with a larger horizontal velocity are not beneficial to phosphorus adsorption on sediment and thus low- and high-adsorption strips of phosphorus occur in the maximum velocity zone and the flow separation zone, respectively. Downwelling flows are beneficial to phosphorus adsorption on sediment as they can enhance phosphorus exchange between overlying water and the bed sediment. A small flo...
汇合处河床沉积物中磷的分布对水动力的响应
了解污染物在河道汇合处的分布对于理解它们在河流网络中的运输和居住是至关重要的,而河流汇合处构成了关键节点。通过水槽试验研究了复杂水动力条件下河道汇合处表层沉积物对磷的吸附分布。研究了支流流量对干流流量比例的影响。结果表明,水平流速和垂直流速是影响磷吸附分布的主要因素。水平流速较大的水流不利于沉积物对磷的吸附,最大流速区和水流分离区分别出现磷的低吸附带和高吸附带。下坡流有利于沉积物对磷的吸附,因为它可以增强上覆水与底泥之间的磷交换。一朵小花……
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来源期刊
CiteScore
2.10
自引率
0.00%
发文量
28
审稿时长
6-12 weeks
期刊介绍: Water Management publishes papers on all aspects of water treatment, water supply, river, wetland and catchment management, inland waterways and urban regeneration. Topics covered: applied fluid dynamics and water (including supply, treatment and sewerage) and river engineering; together with the increasingly important fields of wetland and catchment management, groundwater and contaminated land, waterfront development and urban regeneration. The scope also covers hydroinformatics tools, risk and uncertainty methods, as well as environmental, social and economic issues relating to sustainable development.
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