Reservoirs, 'sponge city' model could mitigate Hanoi flooding: experts

A man stands inside the Metropolitan Area Outer Underground Discharge Channel (MAOUDC) in Tokyo, Japan, September 3, 2020. Photo by AFP

Hanoi could make use of reservoirs and other natural methods to prevent flooding and inundation, similar to what Tokyo or Hong Kong are doing, experts said.

The historic downpour on May 29, with the highest rain level seen since 1986, flooded over 100 locations in the capital. As the climate crisis progresses, along with a growing population and increasing burden on infrastructure, experts say Hanoi would soon need a solution to effectively deal with floods and inundations.

Tran Duc Ha, head of the Water Supply and Sewerage Research Institute, said constructing reservoirs could be scaled up. Hanoi currently has one trial reservoir of 2,000 cubic meters for Nguyen Khuyen Street. Such a model has already been applied in Hong Kong, he said.

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