Rapid urbanization has seen these cities draw heavily on groundwater to service their burgeoning populations, according to research by Singapore's Nanyang Technological University , published in the journal Nature Sustainability last week.
Vietnam's most-populous urban center and main business hub, Ho Chi Minh City, was sinking an average of 16.2 millimeters annually, topping the study's survey of satellite data from 48 large coastal cities around the world. "Many of these fast-subsiding coastal cities are rapidly expanding megacities, where... high demands for groundwater extraction and loading from densely constructed building structures, contribute to local land subsidence," the study says.
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