Subsidence and karst holes in China

As reported on Monday, China Central Television for more than 50 cities in China are in a zone of extensive land subsidence.

Plot of land of about 79 thousand square kilometers fell by more than 200 millimeters, said Zhang Zuozen, Vice President of the China Geological Institute for environmental monitoring.

He also added that, mainly subsidence occurs in the Yangtze River Delta in the north and the plains, covering the north Chinese province of Shaanxi and northwestern Shaanxi province.

According to the report, damage to buildings, bridges, underground utilities and drainage urban system dysfunction caused by settling of the soil, which in turn was due to the excessive use of groundwater.

State Council approved created several ministries and commissions, including the Ministry of Land and Resources, plan to prevent subsidence from 2011 to 2020.

Fengdzhun Gouin, director of the geological department of the Environment Ministry of Land and Resources, said that the main method for monitoring the condition of the soil is to prevent the fall of the water table.

It was also reported that some cities have adopted stringent measures to limit water intake.

In Ksiene, the capital of Shaanxi Province in northwest China, more than 1,000 wells have been sealed after a land area of 150 square meters. kilometers fell by more than 200 millimeters in 1959.

Daily, Shanghai, located in the Yangtze River Delta, supports groundwater through the well 121 60 000 tons of water.

Translation: Anna Krasnov

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