A process study of the interaction of tidal currents, tidal mixing and density gradients in a region of freshwater influence

Xing, Jiuxing; Chen, Shengli

doi:10.1016/j.jmarsys.2017.02.008

Cited by 3 publications

(2 citation statements)

References 31 publications

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“…Whilst these methods consider the directly observed measurements of the pollutant of concern, there is concern over the representativeness of such point data, especially in a turbulent environment [33]. In contrast, hydrodynamic models can be used to provide a detailed representation of the fate of advected material in estuarine and coastal regions [53][54][55]. In shallow ROFI such as Liverpool Bay, these models rely on a complex set of forcing parameters, including wind speed and direction, sporadic and highly variable discharges and pollutant loads from the river sources, and shallow waters with strong tidal influences [47,56].…”

Section: Discussionmentioning

confidence: 99%

A Probabilistic Approach to Mapping the Contribution of Individual Riverine Discharges into Liverpool Bay Using Distance Accumulation Cost Methods on Satellite Derived Ocean-Colour Data

et al. 2023

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Assessments of the water quality in coastal zones often rely on indirect indicators from contributing river inputs and the neighbouring ocean. Using a novel combination of distance accumulation cost methods and an ocean-colour product derived from SENTINEL-3 data, we developed a probabilistic method for the assessment of dissolved inorganic nitrogen (DIN) in Liverpool Bay (UK) for the period from 2017 to 2020. Using our approach, we showed the annual and monthly likelihood of DIN exposure from its 12 major contributory rivers. Furthermore, we generated monthly risk maps showing the probability of DIN exposure from all rivers, which revealed a seasonal variation of extent and location around the bay. The highest likelihood of high DIN exposure throughout the year was in the estuarine regions of the Dee, Mersey, and Ribble, along with near-shore areas along the north Wales coast and around the mouth of the rivers Mersey and Ribble. There were seasonal changes in the risk of DIN exposure, and this risk remained high all year for the Mersey and Dee estuary regions. In contrast, for the mouth and near the coastal areas of the Ribble, the DIN exposure decreased in spring, remained low during the summer and early autumn, before displaying an increase during winter. Our approach offers the ability to assess the water quality within coastal zones without the need of complex hydrodynamic models, whilst still having the potential to apportion nutrient exposure to specific riverine inputs. This information can help to prioritise how direct mitigation strategies can be applied to specific river catchments, focusing the limited resources for coastal zone and river basin management.

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Section: Discussionmentioning

confidence: 99%

A Probabilistic Approach to Mapping the Contribution of Individual Riverine Discharges into Liverpool Bay Using Distance Accumulation Cost Methods on Satellite Derived Ocean-Colour Data

et al. 2023

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“…This is because the movement of the freshwater plume offshore due to Ekman transport causes the intrusion of saltier ambient waters on the continental shelf, promoting plume detachment and leaving mixed waters near the coast (Pimenta et al, 2011;Joseph, 2017). Previous studies have investigated the dynamics of river plumes and the ROFI using either laboratory experiments (Thomas & Linden, 2010;Yuan et al, 2018), field measurements (Geyer et al, 2004;Simpson et al, 2005) or numerical models (Whitney & Garvine, 2005;Xing & Chen, 2017). These studies, nonetheless, have to date mainly focused on the structure and dynamics of the freshwater bulge and coastal currents with limited attention paid to salinity variations and sediment transport due to seasonal changes in monsoonal wind (Yao et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Region of freshwater influence (ROFI) and its impact on sediment transport in the lower Mekong Delta coastal zone of Vietnam

Nguyen

San

Nguyen

et al. 2022

Environ Monit Assess

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The delta of the Mekong River is one of the largest in the world, with the Mekong River carrying large amount of sediments in its Region of Freshwater Influence (ROFI). This study investigates the flow structure and movement of both suspended and bedload sediments in the ROFI of the Lower Mekong Delta (LMD) in order to identify areas prone to sediment accretion and erosion. This is accomplished by applying the three dimensional Coastal and Regional Ocean COmmunity (CROCO) model and then calculating the sediment budget of different stretches of the coastline. The model outputs, depicting areas experiencing sediment accretion and erosion along the coastline of the LMD, are then compared against observations obtained during the period 1990-2015 and demonstrate the ability of the model to identify areas particularly prone to erosion and where preventive actions against coastal erosion should focus.

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Influence of freshwater on the vertical structure of tidal currents: A case study of the Pearl River Estuary

Gu,

Zhang,

Chen

et al. 2024

Estuarine, Coastal and Shelf Science

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A process study of the interaction of tidal currents, tidal mixing and density gradients in a region of freshwater influence

Cited by 3 publications

References 31 publications

A Probabilistic Approach to Mapping the Contribution of Individual Riverine Discharges into Liverpool Bay Using Distance Accumulation Cost Methods on Satellite Derived Ocean-Colour Data

A Probabilistic Approach to Mapping the Contribution of Individual Riverine Discharges into Liverpool Bay Using Distance Accumulation Cost Methods on Satellite Derived Ocean-Colour Data

Region of freshwater influence (ROFI) and its impact on sediment transport in the lower Mekong Delta coastal zone of Vietnam

Influence of freshwater on the vertical structure of tidal currents: A case study of the Pearl River Estuary

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