They found more andmore fresh water well under Yongshu aka fiery cross island via Nan Yang
Freshwater reservoir found at one of Beijing’s artificial islands in the South China Sea
- Chinese scientists discovered the body of water beneath Fiery Cross Reef and it’s thought to be expanding at a fast rate of 1 metre a year
- They believe land reclamation has accelerated the process, and similar reservoirs may be forming at other man-made islands
in Beijing
Published: 6:00pm, 28 Jun, 2020
A fast-expanding body of fresh water has appeared under one of Beijing’s controversial man-made islands in
, a Chinese study has found.
The fresh water was discovered beneath Fiery Cross Reef, known as Yongshu in China, and is believed to be growing at a rate of about 1 metre (3.3 feet) per year – more than twice the speed observed on naturally formed islands.
Similar reservoirs could also be building up under other artificial islands across the region, according to researchers from the South China Sea Institute of Oceanology in Guangzhou.
They could “serve as an important water resource for local inhabitants and ecosystems”, the team led by marine geologist Xu Hehua said in a peer-reviewed paper in the
Journal of Hydrology last month.
Beijing claims sovereignty over most of the resource-rich South China Sea, but there are
, and its island-building activities over the past six years have unnerved the region and drawn criticism from the US.
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Fiery Cross Reef is part of the disputed Spratly archipelago claimed by China, Vietnam and the Philippines. Once a small coral atoll, China began building on the reef back in 2015 – turning it into an island that is 10 times the original size and now spans more than 2 sq km (0.77 sq miles).
With military facilities including missile launchers and a runway, Washington-based think tank the Centre for Strategic and International Studies calls it Beijing’s “most advanced” artificial base in the South China Sea.
It also gets a lot of rain. According to the study, annual rainfall was nearly 3,000mm (118 inches) at the reef – five times the average in mainland China.
While most of that rainwater sank underground through silt and sand, a belt of fresh water was found to be floating on top of the salt water, which is heavier and more dense.
This phenomenon, known as a “freshwater lens”, can take up to 150 years to form and stabilise on a naturally formed island, according to earlier studies.
But at Fiery Cross Reef, it appears to be moving a lot faster. Based on data from observational wells across the island, Xu and his team found the freshwater lens had appeared just two years after the land was reclaimed. This year it measured 7 metres (23 feet), and they predict it will have expanded to a depth of 15 metres (49 feet) by 2035.
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