Methods for regulating flood distribution on the red river

Abstract

Methods for lowering the water levels of the Red River and Duong River: reducing water levels at Pha Lai on the Duong River and Phu Xuyen on the Red River by widening the river downstream of Pha Lai and creating new flood diversion channels with sluice gates at Phu Xuyen from the Red River to the Day River; both solutions create higher river flow velocities, but reduce water levels in Hanoi to a maximum flow rate without the need to release floodwaters at the Day Dam. Because the canal in Phu Xuyen has sluice gates, it creates more flexible flood diversion options for the Red River from an early and distant location, ensuring absolute safety for Hanoi's dikes even in cases of floods exceeding the extreme frequency limit. It also reinforces erosion control for the Red River and Duong River.