TAILIEUCHUNG - The solutions for construction of sea dike and sea embankments system as the sandy mud trap to support mangrove plants in the coastal zone of Hai Phong city, Vietnam

Mangrove plants play a viral role in protecting the coast, retraining erosion. Especially in areas considered the variable wave conditions, complex dynamic conditions such as the coastal region of Hai Phong city. However, due to various reasons, the development/additional planting of mangrove forests in the coastal area of Hai Phong in some locations has not achieved the desired result. | Vietnam Journal of Marine Science and Technology Vol. 21 No. 3 2021 341 352 DOI https 1859-3097 16031 http jmst The solutions for construction of sea dike and sea embankments system as the sandy mud trap to support mangrove plants in the coastal zone of Hai Phong city Vietnam Vu Doan Thai Thai Van Nam HUTECH Institute of Applied Sciences Ho Chi Minh city Vietnam Email vudoanthai@ Received 23 April 2021 Accepted 24 July 2021 2021 Vietnam Academy of Science and Technology VAST Abstract Mangrove plants play a viral role in protecting the coast retraining erosion. Especially in areas considered the variable wave conditions complex dynamic conditions such as the coastal region of Hai Phong city. However due to various reasons the development additional planting of mangrove forests in the coastal area of Hai Phong in some locations has not achieved the desired result. This study was conducted survey measurements of mangroves terrain and practical experience to assess the ecological impact of certain dynamic and sedimentary conditions on mangroves. Thereby proposing several solutions to build sea dykes embankments suitable to Hai Phong conditions strengthen sediment traps and create favorable conditions for developing mangrove trees in this area. Keywords Dynamics mangroves sea dike trap sediment Hai Phong. Citation Vu Doan Thai Thai Van Nam 2021. The solutions for construction of sea dike and sea embankments system as the sandy mud trap to support mangrove plants in the coastal zone of Hai Phong city Vietnam. Vietnam Journal of Marine Science and Technology 21 3 341 352. 341 Vu Doan Thai Thai Van Nam INTRODUCTION climate influences this area with dry winters Hai Phong is a coastal city so it has to face and wet summers 1 . Suspended sediment many negative influences caused by nature concentration in regional rivers changes by the such as waves wind high tide storms and season normally about 50 70 mg L in the dry tropical

• Ngư nghiệp
• Sea dike
• Trap sediment
• Mangrove forests
• Complex dynamic
• Retraining erosion
• Summary of docroral desertation
• The flow velocity due to waves at shallow toe
• Design of dike toe by fill rocks
• Cathai sea dike Hai Phong
• The foot of the embankment
• Modelling sea dike toe
• Erosion during storms
• Toe erosion
• Storm WADIBE
• Numerical model
• Two dike system
• Vietnam coast
• Two dike systems
• Coastal defence
• Coastal zone management
• Zone management
• Practical experiences
• Dike using dredgers
• Sea dyke
• Dredger geotextile
• Construction materials
• Huge bridges
• Summary of doctoral dissertation
• Wave Sea dikes with crown walls
• The northern coastal delta of Vietnam
• The dike design guidelines currently
• Crown walls in the north
• Hydrodynamic regime
• Natural disasters
• Reserving fresh water
• Model calibration