according toVietnamOfficial mediaAccording to VnExpress,Due toRising sea levels, droughts, tidal fluctuations, and upstream freshwater shortages have intensified seawater backflow,The resulting crop losses may be as high as70 trillion Vietnamese dong.

Earlier this month, the Ministry of Water ResourcesOnce upon a timeWarning statement,seawaterBackflow irrigationMay affect the Mekong Delta by approximatelyAn 80000 hectare rice and fruit farm.Currently, it appears that,VietnamThe fishing industry suffered the most severe losses, and it is expected that the annual loss amount will reachtwentyTrillion Vietnamese dong, accounting for approximately the total agricultural losses30%, followed by fruit trees, grain cultivation, etc.

According to data from the Vietnamese Ministry of Natural Resources and Environment,two thousand and twenty-threeSince the beginning of the year, the degree of soil salinization in the Mekong Delta region has been higher than the average in previous years.Vietnam's Mekong DeltaVietnamLand area12% of Vietnam's population resides in 19% of the country, producing 50% of the country's rice, 65% of its aquatic products, and 70% of its fruits. It undertakes 95% of the country's rice and 60% of its aquatic products exports, and plays a crucial role in social and economic development.

The problems faced by the Mekong Delta in Vietnam are the result of the interaction between natural factors and human activities, with human development being a more significant issue. The Mekong Delta in terms of natural geography has an altitude ofBetween 0-4 meters, the southern region is invaded by natural seawater backflow, and 4 out of 7 geographical zones belong to seasonal or year-round flooded areas.

It is precisely because of the three large-scale developments in history that the Mekong DeltaThe "artificial river channels" extend in all directions, and the "village farmland complex" established by enclosing dams and protecting farmland has become a common rural landscape, but it has also completely changed the natural appearance of the delta, especially changing the pattern and rhythm of water flow.

The main problem currently faced is that developed river networks not only facilitate the discharge of floods during the rainy season, but also easily lead to the backflow of seawater during the dry season. The harm of seawater backflow has reached up to half of the land area20%; The second is that dam protection significantly reduces the system's water storage capacity and self regulating capacity, increases the utilization of groundwater, and overexploitation of groundwater leads to ground subsidence of 1.1-2.5 centimeters per year, with urban subsidence rates higher than those in rural areas, which is greater than the sea level rise caused by climate change; The third issue is the collapse of the riverbank due to sand mining and reduced sediment in the river. In addition, 66% of the coastline is eroded, resulting in an annual loss of approximately 500 hectares of land in the delta.

In order to cope with seawater backflow,VietnamLocal governments have taken measures, such as constructing irrigation projects and storing fresh water. The largest rice production area in Vietnam——Last year, Jianjiang Province also built multiple gates to prevent seawater backflow and required farmers to test the salinity of their fields before irrigating them. At the same time, they cleared irrigation channels to ensure that crops have sufficient water sources.