Minimum Length of Salt Intrusion in Estuaries

Rigter, Ben P.

doi:10.1061/jyceaj.0003741

Cited by 30 publications

(4 citation statements)

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“…On the other hand, the enhanced longitudinal salinity gradient during spring tide may increase residual circulation as a result of shorter salt intrusion. The shortening of salt intrusion during spring tide has been argued by Geyer (1993) using the steady-state momentum and salt balance equations, and shown using field data from the Columbia River (Jay and Smith 1990) and data from a tidal flume (Rigter 1973). However, the response of the longitudinal salinity distribution tends to have a longer time scale than the change in tidal mixing over the spring-neap cycles, so its effect is greatly reduced (Fischer 1980).…”

Section: Spring-neap Variationsmentioning

confidence: 94%

Investigation of Long-Term Transport in Tanshui River Estuary, Taiwan

Liu

Hsu

Kuo

2001

J. Waterway, Port, Coastal, Ocean Eng.

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The net, long-term transport of materials in estuaries is governed primarily by the residual (or tidally averaged) circulation in the system. Knowledge of the residual circulation is essential for predicting the transport of algal patches, debris, and pollutants of concern in an estuary. A real-time, two-dimensional, laterally averaged hydrodynamic model is used to analyze residual current and salinity distributions in the Tanshui River estuary. The model results were filtered to arrive at the subtidal, or residual quantities. The characteristic twolayered estuarine circulation prevails for most of the time at Kuan-Du station near the river mouth. Though the circulation strengthens with increasing river discharge at low flow, its strength decreases at moderate river discharge and the two-layered circulation ceases at moderately high flow. This implies a weak trapping capacity in the estuary. At the upriver stations where salinity is lower, strength of circulation generally decreases with increasing river discharge. The response of residual velocity to the spring-neap cycle indicates stronger residual circulation during neap tide than spring tide.

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Section: Spring-neap Variationsmentioning

confidence: 94%

Investigation of Long-Term Transport in Tanshui River Estuary, Taiwan

Liu

Hsu

Kuo

2001

J. Waterway, Port, Coastal, Ocean Eng.

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“…There are three types of intrusion length: intrusion length at low water slack (L LWS ), intrusion length at high water slack (L HWS ) and tidal average intrusion length (L TA ), which is considered to be an average of L LWS and L HWS . There are a number of available predictive models: Van den Burgh (1972), Rigter (1973), Fischer (1974, Van Os and Abraham (1990), Savenije (1993Savenije ( , 2005 and Prandle (2004). Van den Burgh (1972) using the prototype data of Dutch estuaries arrived at the following equation:…”

Section: Predictive Modelsmentioning

confidence: 99%

“…Other notations have already been presented in Section 2.2.4. Rigter (1973), based on flume data of Delft Hydraulics Laboratory (DHL) and of the Waterways Experiment Station (WES), proposed:…”

Section: Predictive Modelsmentioning

confidence: 99%

“…All the above-mentioned models were derived for single-channel estuaries. It is remarked that the models of Rigter (1973), Fischer (1974 and Van Os and Abraham (1990) were developed under an assumption of constant cross section. The major advantage of the model of Savenije (1993cSavenije ( , 2005 is that this model takes into account the exponential shape of estuaries, i.e.…”

Section: Predictive Modelsmentioning

confidence: 99%

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Salt Intrusion, Tides and Mixing in Multi-Channel Estuaries

Nguyen¹

2008

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To my parents PREFACE I got the first academic impressions about salt intrusion in July 2002, when some friends of mine studying in Coastal Engineering (UNESCO-IHE) told me about the interesting subject "Density currents and salt intrusion in estuaries", which was taught by Ir. Mick van der Wegen and Prof. Hubert Savenije. Unfortunately, I did not have a chance to attend the class since I was following another one at the same time, and I thought I should take it in the near future.Shortly after, when carrying out my M.Sc. study in flood management of the lower Dong Nai -Sai Gon river basin in Vietnam, I realized that apart from floods and water quality, salt intrusion is a major problem in the basin. The problem appeared even more severe in the neighbouring system, the Mekong Delta, which is the most important agricultural and aquacultural area of South Vietnam. I was inspired by the idea that I would carry out research on the salt intrusion in the lower Dong Nai -Sai Gon river basin and the Mekong Delta. I was fortunate to have a number of people to encourage and to support me following this idea. My M.Sc. study supervisors, Ing. Klaas-jan Douben and Prof. Bela Petry, and my employer in Vietnam, Dr. Tang Duc Thang introduced me to Prof. Savenije, who is an expert in salt intrusion and estuarine hydraulics. After their introduction, I went to see Prof. Savenije in person and to express my idea to do some research on the subject of salt intrusion. With his enthusiasm and his inspiring vision about solving the salt intrusion problem and analyzing tidal hydraulics, we plotted the plan for the research proposal and for getting the research fund.After the funding issue was settled, I started my research in February 2004. It took ten months to finalize the research proposal, during which I learned much about not only salt intrusion, but also mixing and tidal hydraulics. The Mekong Delta and the Scheldt estuary became the main study areas of the research.

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A general description of estuarine behaviour

McDowell

O’Connor

1977

Hydraulic Behaviour of Estuaries

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Minimum Length of Salt Intrusion in Estuaries

Cited by 30 publications

References 0 publications

Investigation of Long-Term Transport in Tanshui River Estuary, Taiwan

Investigation of Long-Term Transport in Tanshui River Estuary, Taiwan

Salt Intrusion, Tides and Mixing in Multi-Channel Estuaries

A general description of estuarine behaviour

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