The dyke system has been completed which include the river dyke, sea dyke and sluices under dyke. The total dyke length on main rivers is 2,700 km, sea dyke 310 km. The river dyke system can cope with the flood level of 13.4 m in Hanoi, and 7.21 m in Pha Lai. The sea dyke is designed to prevent saline intrusion in the event of 9 grade stormed combined with high tide.

             In order to reduce downstream flood, most of the upstream reservoirs involve in the flood absorption, namely Thac ba, Hoa binh, Nui coc, Cam son... In the future, there will be reservoirs of Son la and Tuyen quang. As a result, the flood and drought will be better controlled.