Chinese scientists find some Yangtze flood controls may do more harm than good
For centuries, the Yangtze River has been China’s vital lifeblood, yet its floods have claimed countless lives. To tame its waters, flood-control systems have evolved from ancient dykes to the engineering marvel of the Three Gorges Dam. But a new study has uncovered a paradox: some human interventions may have inadvertently worsened the very flood risks they were built to mitigate. “We show that…
Ancient floods have shaped the Yangtze River, a vital artery for China, but modern flood control efforts may be exacerbating the very risks they aim to prevent, according to a recent study. Researchers from China and Europe analyzed 500 years of flood patterns and found that human interventions, such as embankments and lake reclamation, have amplified the severity of extreme floods.
While large dams have been effective at reducing moderate flood peaks, the cumulative effects of river regulation on rare, extreme floods are more complex. The study's authors suggest that future flood control management should focus on basin-wide flood risk management rather than solely containing floodwaters within river channels.
They envision a hybrid approach combining natural solutions, such as wetlands and floodplain restoration, with high-standard engineering for focused protection in critical areas.
Written by urgent.news from Reuters Business via SCMP's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.
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