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Salt Intrusion, Tides and Mixing in Multi-channel Estuaries

By: Nguyen Anh Duc

157 pages, 40 col figs, 27 tables

Taylor & Francis

Paperback | Oct 2008 | #177449 | ISBN-13: 9780415471220
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NHBS Price: £58.99 $77/€67 approx

About this book

Multi-channel estuaries, such as the Mekong Delta in Vietnam and the Scheldt in the Netherlands, have characteristics of both the river and the sea, forming a unique environment influenced by tidal movements of the sea and freshwater flow of the river. This study addresses a number of knowledge gaps in multi-channel estuaries by developing a predictive analytical approach for salinity intrusion and discharge estimate in multi-channel estuaries.

The new approach agrees well with 1-D hydrodynamic models and observations, indicating its applicability in practice. Most importantly, the study has successfully developed a new theory and a new equation to quantify tidal pumping due to ebb-flood channel residual circulation and the related salt dispersion.


CONTENTS Preface Summary 1 Introduction 1.2 Main study areas 1.3 Research challenges and objectives of the study 1.4 Research approach and outline of the thesis 2 Salt intrusion, Mixing and Tides in estuaries 2.1 Introduction 2.2 Classification of estuaries characteristic 2.3 Mixing in estuaries 2.4 Salt transport and salinity intrusion models in estuaries 2.5 Tidal dynamics in estuaries 2.6 Conclusions 3 Salt intrusion in multi-channel estuaries 3.1 Introduction 3.2 Summary of the method 3.3 The Mekong Delta in Vietnam 3.4 Data sets of the Mekong Delta estuaries 3.5 Salinity computation for the Mekong Delta estuaries 3.6 Predictive model 3.7 Discussion 3.8 Conclusions 4 Discharge distribution over estuary branches 4.1 Introduction 4.2 The Mekong Delta, Vietnam 4.3 Estimation of the discharge distribution over the Mekong branches basis of salinity measurements 4.4 Using the analytical salt intrusion model to compute the discharge distribution 4.5 Using a hydraulic model to compute the discharge distribution 4.6 Discussion 4.7 Conclusions 5 Tidal characteristics in multi-channel estuaries 5.1 Introduction 5.2 Tools for investigating tidal wave characteristics in estuaries 5.3 Tidal wave characteristics in multi-channel estuaries 5.4 Conclusions Chapter 6 Mixing in estuaries with an ebb-flood channel system 6.1 Introduction 6.2 Methodology 6.3 Results 6.4 Discussion 6.5 Conclusions Chapter 7 Conclusions and Recommendations 7.1 Conclusions 7.2 Recommendations References List of figures List of tables Notations Acknowledgements About the author

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Nguyen Anh Duc (1976) graduated from Ho Chi Minh City University of Architecture, majoring in Building Construction and Industrial Structures in 1999. In 2001 he obtained a post-graduate scholarship at UNESCO-IHE, Delft, The Netherlands and received his MSc degree (with distinction) in June 2003 on a thesis entitled: "Flood Management Strategies: A case study in the lower Dong Nai - Sai Gon river system, Vietnam". In 2004 he started his PhD research at UNESCO-IHE on Salt Intrusion, Mixing and Tides in Alluvial Estuaries, resulting in this dissertation.

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