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The Quaternary deposit in the Shanghai region is composed of a layered multi-aquifer-aquitard system (MAAS). The MAAS was formed mainly during the warm geological era over 2.6 million years ago. There is one artesian aquifer and five confined aquifer layers (AqI to AqV) in the MAAS with a very high groundwater pressure head. The groundwater in the aquifers of Shanghai is composed of both fresh and...
Karst landscapes are widely distributed in China, and buried karst is widespread in Guangdong. This study mainly focuses on buried karst or karst caves which are underground at depths of up to 50 m and can significantly affect engineering construction activity. The karst caves, which are widely distributed in Guangdong Province, have the following features: high fissure water content, high rock permeability,...
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