Causes and solutions to limit erosion and sedimentation in the river system in the Mekong Delta That was the topic discussed at the International Conference organized on November 26, 2019, at An Giang University, VNU-HCM. The Conference was co-organized by the Science & Technology Program for the Sustainable Development of the Southwest Region (the Southwest Program) and the People's Committee of An Giang Province and VNU-HCM.
There attended and discussed at the conference many leaders of Ministry of Natural Resources and Environment, leaders of An Giang province and nearly 300 delegates from Department of Science and Technology, Department of Natural Resources and Environment, Department of Agriculture and Rural Development of 13 provinces in the Mekong Delta and national and international scientists.
Through 10 presentations at the Conference, scientists suggested that the circumstances of erosion and sedimentation in the river system in the Mekong Delta came to an alarm. While in 2010, the whole region had only 99 venues suffering erosion and landslides, by the year of 2019 there were 681 venues (increasing by 7 times as many as in 2010), in which An Giang and Dong Thap are the provinces experiencing most serious erosions.
According to Prof. Dr. Tran Linh Thuoc - Rector of the University of Natural Sciences, VNU-HCM, some of the causes of riverbank erosion in the Mekong Delta are the combination between changes in the physical properties of the two sides of the river at the beginning of the annual rainy season and the fluctuation of the water level in the river, which causes the river bank's land to become unstable. The erosion of the riverbed and riverbank takes place by concentrating the flow to one side at the bend of the river. The sand mining in the river bed is not planned scientifically, badly affecting the flow.
Many Vietnamese and international experts proposed numerous measures to solve the landslide situation, including focusing on dredging and expanding river beds on the opposite side and combining the construction of embankments to protect and reinforce the area suffering landslidea; strictly controlling sand mining; building roads and residential areas away from river banks or canals, etc. Besides, experts also supposed that it was necessary to conduct surveys and assess the areas along important river banks at risk of erosion to implement measures to prevent landslides in advance.
Giving a concluding speech at the Conference, Mr. Nguyen Thanh Binh - Chairman of An Giang People's Committee emphasized that the conference was a reliable source of information to support the Party and the State to promulgate macro mechanisms and policies; adding that leaders from central to local levels should have the right decisions to avoid risks and negative impacts caused by landslides, and help raise awareness and responsibility of the issue in the community.
Hieu Nhu - Hoang Kien
Translated by Le Do Thai