Comprehensive Hydrodynamic Fitness of an Estuary Channel and the Effects of a Water Diversion Inflow

He, Wei‐Ming; Jiang, Aili; Zhang, Jian; Xu, Hui; Xiao, Yang; Chen, Sheng

doi:10.1007/s12237-021-00981-8

Cited by 4 publications

(4 citation statements)

References 42 publications

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“…The turn‐over time is used to quantify the water exchange, and is defined as the time when the local mass concentration reduces to its 1/ e (i.e., 0.368, where e ≈ 2.718 is the natural constant), as shown in Equation () (He et al, 2021; Montano‐Ley & Federico Soto‐Jimenez, 2019). For a specific location in the estuary, the turn‐over time can be quantified as the duration that the local particle concentration reduces from 1 to its 1/ e (i.e., 0.368).…”

Section: Methodsmentioning

confidence: 99%

“…shown in Equation ( 16) (He et al, 2021;Montano-Ley & Federico Soto-Jimenez, 2019). For a specific location in the estuary, the turnover time can be quantified as the duration that the local particle concentration reduces from 1 to its 1/e (i.e., 0.368).…”

Section: Quantification Of the Water Exchange And Saltwater Intrusionmentioning

confidence: 99%

“…The strength of water exchange is influenced by the local hydrodynamic condition, which is determined by the upstream freshwater runoff and downstream sea tide. Many parameters are proposed to quantify the ability of water exchange, including the flushing time, turnover time, exchange rate, and so forth (He et al, 2021; Lv et al, 2016; Montano‐Ley & Federico Soto‐Jimenez, 2019). The freshwater runoff has a vital impact on the water exchange, and the flushing time and turnover time tend to be large with small water exchange in the dry seasons (Liu et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Combined effects of runoff increase and sea level rise on the water exchange and saltwater intrusion for an estuary bay in non‐flood season

Zhou

Zhang

et al. 2022

Hydrological Processes

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Estuary bays are vulnerable to salinization effects due to relative sea level rise and modification in upland hydrology owing to a variety of factors. Much research has evaluated the one‐sided effect of runoff discharge or sea level on the water exchange and saltwater intrusion for an estuary, while their combined effects have not been evaluated, especially for an estuary bay with narrow river mouth. Taking the Wanquan Estuary Bay (WEB), China, as study case, this paper has revealed the long‐term significant increasing trend of freshwater runoff in non‐flood season during years 1956–2017 using the Man‐Kendall trend analysis, robust principle component regression and Theil–Sen's estimator. A 3‐D hydrodynamic‐salinity‐tracer numerical model is built and calibrated based on the finite‐volume community ocean model, and the effects of runoff increase and sea level rise on the water exchange and saltwater intrusion are investigated. This paper shows the following: (1) The freshwater runoff during non‐flood season in WEB shows significant long‐term increasing trend, and the mean changing magnitude is 0.4546 m3/s/a. (2) The increased runoff accelerates the water exchange, and reduces the turn‐over time and saltwater intrusion in the WEB. The sea level rise reduces the water exchange and increase the saltwater intrusion. (3) For the estuary bay with narrow river mouth, the salinity distributions show more vertical stratification characteristics. The freshwater runoff has power relationships with the average turnover time and salinity, and the sea level has linear relationships. (4) The water exchange and salinity of an estuary bay is more vulnerable to the changed runoff than the sea level rise, while the impacts of sea level rise would increase for estuaries with wide river mouth. This paper provides support for the freshwater exploitation and utilization in estuary bay under the background of climate change and sea level rise.

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Section: Methodsmentioning

confidence: 99%

Section: Quantification Of the Water Exchange And Saltwater Intrusionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Combined effects of runoff increase and sea level rise on the water exchange and saltwater intrusion for an estuary bay in non‐flood season

Zhou

Zhang

et al. 2022

Hydrological Processes

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“…Generally, long-term diversion with a low flow rate is better than short-term diversion with a high flow rate, and a low nutrient concentration of diverted water is also important [ 78 , 79 , 80 ]. Hydrodynamic and water quality models are introduced to simulate the transport of pollutants, the flow movement, water level changes and the effectiveness of water transfer projects, including HEC-RAS, MKIE11, MIKE 21 FM, EFDC, FVCOM and other models [ 79 , 81 , 82 , 83 , 84 , 85 ]. This technique improves water exchange and the reoxygenation rate, which is especially suitable for polluted lakes [ 81 ].…”

Section: In Situ Remediation Technologymentioning

confidence: 99%

In Situ Remediation Technology for Heavy Metal Contaminated Sediment: A Review

Chai

2022

IJERPH

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Sediment is an important part of the aquatic ecosystem, which involves material storage and energy exchange. However, heavy metal pollution in sediment is on the increase, becoming an important concern for the world. In this paper, the state-of-art in situ remediation technology for contaminated sediment was elaborated, including water diversion, capping, electrokinetic remediation, chemical amendments, bioremediation and combined remediation. The mechanisms for these techniques to reduce/immobilize heavy metals include physical, electrical, chemical and biological processes. Furthermore, application principle, efficiency and scope, advantages and disadvantages, as well as the latest research progress for each restoration technology, are systematically reviewed. This information will benefit in selecting appropriate and effective remediation techniques for heavy metal-contaminated sediment in specific scenarios.

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