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.
Table of Contents
2 Salt intrusion, Mixing and Tides in estuaries
3 Salt intrusion in multi-channel estuaries
4 Discharge distribution over estuary branches
5 Tidal characteristics in multi-channel estuaries
6 Mixing in estuaries with an ebb-flood channel system
7 Conclusions and Recommendations
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.