Research and Assessment of Salinity Intrusion Trends in the Lower Ma River Under the Context of Climate Change

The coastal plain of the Ma River has a 102km long coastline, including the districts: Nga Son, Hau Loc, Hoang Hoa, Sam Son City, Quang Xuong, Tinh Gia with estuaries: Cua Hoi, Lach Sung, Lach Truong, Lach Hoang. This is a densely populated area that is considered to have a high economic development rate according to the trend of economic restructuring and crop structure transformation, so the demand for water resources is increasing. In recent years, the lower reaches of the Ma River have been heavily affected by salt intrusion, especially in the context of climate change, the level of impact is more serious. In the dry season, when the water level at the downstream stations is much lower than the multi-year average, the amount of flow from upstream drops sharply, creating an opportunity for salt to go deeper into the inland, causing considerable damage in agricultural production, aquaculture and seafood in coastal areas.