Modelling the Influence of Riverine Inputs on the Circulation and Flushing Times of Small Shallow Estuaries
Modelling the Influence of Riverine Inputs on the Circulation and Flushing Times of Small Shallow Estuaries
复制标题
模拟河流输入对小浅河口循环和冲刷时间的影响
DOI:
10.1007/s12237-020-00776-3
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发表时间:
2020
影响因子:
2.7
通讯作者:
Huggett R
中科院分区:
文献类型:
--
作者:
Huggett R
Simple flushing time calculations for estuarine systems can be used as proxies for eutrophication susceptibility. However, more complex methods are required to better understand entire systems. Understanding of the hydrodynamics driving circulation and flushing times in small, eutrophic, temperate estuaries is less advanced than larger counterparts due to lack of data and difficulties in accurately modelling small-scale systems. This paper uses the microtidal Christchurch Harbour estuary in Southern UK as a case study to elucidate the physical controls on eutrophication susceptibility in small shallow basins. A depth-averaged hydrodynamic model has been configured of the estuary to investigate the physical processes driving circulation with particular emphasis on understanding the impact of riverine inputs to this system. Results indicate circulation control changes from tidally to fluvially driven as riverine inputs increase. Flushing times, calculated using a particle tracking method, indicate that the system can take as long as 132 h to flush when river flow is low, or as short as 12 h when riverine input is exceptionally high. When total river flow into the estuary is less than 30 m3s−1, tidal flux is the dominant hydrodynamic control, which results in high flushing times during neap tides. Conversely, when riverine input is greater than 30 m3s−1, the dominant hydrodynamic control is fluvial flux, and flushing times during spring tides are longer than at neaps. The methodology presented here shows that modelling at small spatial scales is possible but highlights the importance of particle tracking methods to determine flushing time variability across a system.
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DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
Fei Ye;Yinglong J. Zhang;Harry Wang;M. Friedrichs;I. Irby;A. Valle;Zhengui Wang;Hai Huang;Jian Shen;Jiabi Du
通讯作者:
Jiabi Du
影响因子:
4.6
作者:
A. Ménesguen;Morgan Dussauze;F. Dumas
通讯作者:
F. Dumas
DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
J. Ferreira;A. Nobre;T. Simas;M. C. Silva;A. Newton;S. Bricker;W. Wolff;P. Stacey;A. Sequeira
通讯作者:
A. Sequeira
影响因子:
3.3
作者:
Shu Gao;M. Collins
通讯作者:
M. Collins
DOI:
--
发表时间:
2005
期刊:
影响因子:
--
作者:
D. Krause‐Jensen;T. M. Greve;K. Nielsen
通讯作者:
K. Nielsen