Assessing Impacts of Sea Level Rise and Sea Dike Construction on Salinity Regime in Can Gio Bay, South Vietnam

Abstract To protect Ho Chi Minh City (HCMC) from submergence due to the ongoing rapid sea level rise (SLR), the Vietnamese government have proposed the construction of a sea dike in Can Gio Bay. Can Gio Bay will be closed to regulate the storage and to control water levels in the drainage and sewer...

Full description

Saved in:
Bibliographic Details
Published in:Journal of waterway, port, coastal, and ocean engineering port, coastal, and ocean engineering, 2020-11, Vol.146 (6)
Main Authors: Thu, Vu Thi Hoai, Tabata, Toshinori, Hiramatsu, Kazuaki, Ngoc, Trieu Anh, Harada, Masayoshi
Format: Article
Language:English
Subjects:
Case Studies
Case Study
Coastal aquifers
Construction
Dikes
Distribution
Drainage systems
Embankments
Freshwater
Hydrodynamics
Inland water environment
Mangrove swamps
Mangroves
Saline water intrusion
Salinity
Salinity distribution
Salinity effects
Salt water intrusion
Sea level
Sea level rise
Seawater
Seawater intrusion
Sewer systems
Storage
Submergence
Two dimensional analysis
Two dimensional models
Water levels
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Abstract To protect Ho Chi Minh City (HCMC) from submergence due to the ongoing rapid sea level rise (SLR), the Vietnamese government have proposed the construction of a sea dike in Can Gio Bay. Can Gio Bay will be closed to regulate the storage and to control water levels in the drainage and sewer systems of HCMC. This could significantly impact the salinity distribution in the Bay and affect its mangrove forest. In this study, a set of scenarios will be analyzed using two-dimensional hydrodynamic and convective-dispersive models to assess the effects of SLR and the construction of a sea dike on salinity distribution in the Bay. The results reveal that the salinity in most areas of the Bay tended to increase positively with the SLR. The sea dikes significantly reduced seawater intrusion into half of the upstream area of the Bay. Considering the influence of SLR and the construction of a sea dike, the sea dike could result in the reduction of salinity. Furthermore, if the sea dike was operated for a long time, half of the Bay area would become freshwater, which would lead to adverse effects on the mangrove forest.
ISSN:0733-950X
1943-5460
DOI:10.1061/(ASCE)WW.1943-5460.0000608