scholarly journals Land subsidence due to ground-water withdrawal in the Los Banos-Kettleman City area, California; Part 3, Interrelations of water-level change, change in aquifer-system thickness, and subsidence

1975 ◽  
Author(s):  
W.B. Bull ◽  
J.F. Poland
Keyword(s):  
Ground Water ◽  
Water Level ◽  
Land Subsidence ◽  
Water Withdrawal ◽  
Water Level Change ◽  
Aquifer System ◽  
City Area ◽  
Level Change

Research on Variation of Land Subsidence in Changzhou

2012 ◽  
Vol 256-259 ◽  
pp. 463-466 ◽  
Author(s):  
Xiong Xia ◽  
Huang Xu ◽  
Ai Qin Zhang ◽  
Li Qian ◽  
Kai Huang
Keyword(s):  
Land Subsidence ◽  
Coupling Model ◽  
Yangtze River Delta ◽  
Bench Mark ◽  
Quaternary Sediments ◽  
Water Level Change ◽  
Aquifer System ◽  
Level Change ◽  
Geological Characteristics ◽  
Yangtze River Delta Region

Land subsidence as one of geological disasters, due to the characteristics and specificity hydrogeology, which results in the differences of subsidence in different regions. Changzhou City, in Jiangsu province, in China, underlain by a multi-layered aquifer system in Quaternary sediments in the Great Yangtze River Delta region. Take into account geological characteristics and mechanisms, the Changzhou layers can be divided respectively into four soil stratifications: phreatic aquifer, Part I aquifer ,Part II aquifer ,and substratum. According to the monitoring data of bedrock bench mark at Changzhou Qingliang primary school, get the mechanism of water-soil interaction and the law between land subsidence and water level change, and establishes numerical coupling model and simulates, that can evaluate and predict Changzhou land subsidence.

Analysis of the Effect of Ground Water Level Change on Site Predominant Period

2012 ◽  
Vol 256-259 ◽  
pp. 499-502
Author(s):  
Guang Wei Zhao ◽  
He Wang
Keyword(s):  
Computer Simulation ◽  
Ground Water ◽  
Water Level ◽  
Underground Water ◽  
Ground Water Level ◽  
Water Level Change ◽  
Foundation Soil ◽  
Predominant Period ◽  
Level Change ◽  
Underground Water Level

The rigidity and density changes of foundation soil were studied in this paper ,as well as the change rules of earthquake wave spread effect and site dynamic characters,through comprehensive wave velocity test and the computer simulation,in which the ground water level change was taken into consideration . According to the engineering examples, the effect of the fluctuation of underground water level on the site predominant period is analyzed.

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