HCM City experiences an average subsidence rate of 4 centimeters a year, partly due to rampant groundwater exploitation.
|HCM City annually subsides 4 cm partly due to groundwater exploitation. (Illustrative image. — Photo kinhtedothi)|
Director of the IT Center of the Department of Natural Resources and Environment Bui Hong Son revealed at a seminar about rapid land subsidence in HCM City on Friday (Dec 11) that according to the Ministry of Natural Resources and Environment, the city has had subsidence rate of 4 centimeters; worse, even some places with 6-7 centimeters annually.
Rapid land subsidence not only destabilizes the city infrastructure but also increases the risk of flooding, especially in the face of abrupt rainstorms, excessive rainfall and high tide levels.
He pointed out that weak land, heavy traffic loads and groundwater exploitation are culprits of the problem.
The University of Technology’ studies has shown that weak land account for 60 percent of the city area mostly in districts 2, 4, 6, 7, 8, outlying suburbs Nha Be, Can Gio, and along Sai Gon River.
Therefore, scientists proposed limitation of the quantity of groundwater exploitation and reduction of building houses in weak land districts. Furthermore, there should be prediction for subsidence in different districts to have proper solutions. SGGP
The HCMC government has urged the Ministry of Natural Resources and Environment to cease issuing new licenses for the exploitation and use of groundwater throughout the city, due to increased water pollution and land subsidence.
The People’s Committee of HCM City is taking measures to restrict groundwater exploitation, which has led to increased water pollution, flooding and subsidence.