The coastal area of the Lower Mekong Delta (LMD) is influenced by waves, tidal currents, changing sediment loads from the Mekong, and Sai Gon-Dong Nai rivers, and storm surges from the East and West Sea. | Existing shoreline sea dyke and shore protection works in the Lower Mekong Delta Vietnam and oriented solutions for stability TUYEÅN TAÄP KEÁT QUAÛ KHOA HOÏC amp COÂNG NGHEÄ 2017 - 2018 EXISTING SHORELINE SEA DYKE AND SHORE PROTECTION WORKS IN THE LOWER MEKONG DELTA VIETNAM AND ORIENTED SOLUTIONS FOR STABILITY Dinh Cong San1 Tang Duc Thang2 Le Manh Hung1 1 Water Resources Research SIWRR manhhungvawr@ 2 Vietnam Academy for Water Resources ABSTRACT The coastal area of the Lower Mekong Delta LMD is influenced by waves tidal currents changing sediment loads from the Mekong and Sai Gon-Dong Nai rivers and storm surges from the East and West Sea. In addition human activity has an impact on erosion and deposition processes through dyke construction and drainage agriculture aquaculture and fishery exploitation along the coastal areas. In recent years the impact of upstream dams especially on the Mekong main river has reduced sediment feeding into the LMD and its estuary. All of these impacts have caused shore erosion along approximately two thirds of the total coastline length and a land loss rate of about 500 ha year in the past ten years. In the future climate change and sea level rise will make this situation worse. In order to prepare a national research program dealing with this issue this paper presents the existing situation concerning the shoreline sea dyke and shore protection works in the area and an oriented solution for the stability of the LMD coast in Vietnam. Keywords Shore erosion Shore protection works LMD. 1. INTRODUCTION The low elevation coastal zone in the world by the year 2000 occupied 2 area and home of 600 million people in which eight of top ten largest city situated. Coastal regions and populations are exposed to natural hazards and faced with unsustainable practices. Most of the coastal areas of mega deltas are under the threat of accelerated subsidence and erosion due to lacking of sediment from upstream inappropriate land use .
