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Qu C.-S.,Beijing Normal University | Qu C.-S.,Engineering Research Center for Groundwater Pollution Control and Remediation | Qu C.-S.,Shanghai Changkai Geotechnical Co.
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2010

According to the excavation stages, pumping test, geological and environmental conditions, dewatering program in deep foundation pit of Dongjiadu section in Shanghai Metro Line No.4 is made, which is the in situ restoration of subsided tunnel in disturbed layers. The full coupling numerical simulation model between the three dimensional dewatering seepage and soil deformation control is carried. The model parameters are obtained by the pumping test, and the numerical results agree well with the monitoring data. The control system of waterlevel, subsidence, evacation depth and flow are shown in the dewatering information map, which can reflect the real-time information and protect the nearby building effectively.


Bai L.,Chinese Research Academy of Environmental Sciences | Bai L.,Engineering Research Center for Groundwater Pollution Control and Remediation | Wang Y.,China National Environmental Monitoring Station | Meng F.,Chinese Research Academy of Environmental Sciences
Water and Environment Journal | Year: 2012

Groundwater vulnerability assessment plays a vital role in the utilization and protection of groundwater resources. DRASTIC is one of the most widely used models for groundwater vulnerability assessment. However, the DRASTIC model should be modified based on the local hydrogeological conditions in order to get a relatively accurate result. In this study, Baotou, China was chosen as a case study. The groundwater vulnerability was assessed using DRASTIC at first, but the evaluation results were not consistent with the groundwater quality. So the DRASTIC model was modified based on extension theory and analytic hierarchy process (AHP) method. The extension theory could be used to divide the groundwater vulnerability grades in the DRASTIC model. It is a new attempt to use extension theory and DRASTIC in the assessment of groundwater vulnerability, and the research results show that this method is better for assessing groundwater vulnerability. © 2011 The Authors. Water and Environment Journal © 2011 CIWEM.


Zhai Y.-Z.,Beijing Normal University | Zhai Y.-Z.,Engineering Research Center for Groundwater Pollution Control and Remediation | Wang J.-S.,Beijing Normal University | Wang J.-S.,Engineering Research Center for Groundwater Pollution Control and Remediation
Shuili Xuebao/Journal of Hydraulic Engineering | Year: 2012

Water exchange during the recharge-discharge process of groundwater meets the law of mass conservation, which can be described that the input and output of groundwater should meet the water budget equation in detail. The comprehension of elements of groundwater regime and their temporal and spatial variations reflecting the mechanism of groundwater exchange process is vital for the groundwater evaluation and the prospective prediction of water supply capacity. The temporal variations and relationships of elements of the groundwater regime (including groundwater level, recharge, and discharge) in Beijing Plain were analyzed in this paper based on water budget theory and using water-table fluctuation method. The results show that, (1) the annual total output of groundwater is generally more than the annual input during the past decades, which leads to the yearly decreasing of groundwater reserve; (2) the aquifer can yield (store) about 476×10 6 m 3 of water when the mean groundwater level drops (raise) per meter; (3) large part of the extraction quantity of groundwater during the past decades are from the natural discharge of groundwater captured and there exists a well negative linear correlation between these two water budget items; and (4) the specific yield of aquifer within the disturbed belt of groundwater level (buried 7.50~22.92 m below ground) is generally decreasing with depth with the equivalent specific yield of 0.077.


Bai L.,Chinese Research Academy of Environmental Sciences | Bai L.,Engineering Research Center for Groundwater Pollution Control and Remediation | Wang Y.,China National Environmental Monitoring Station | Li F.,Chinese Research Academy of Environmental Sciences | Li F.,Engineering Research Center for Groundwater Pollution Control and Remediation
Advanced Materials Research | Year: 2012

The risk assessment model and parameter system of groundwater pollution were established in this paper. The multi-index evaluation method of groundwater pollution sources was proposed, and the GIS-based risk assessment method of groundwater pollution was produced in comprehensive consideration of groundwater vulnerability and groundwater pollution sources. The multi-index method suggested in this paper was used in the risk assessment of groundwater pollution at a plain area of a big city in North China, and the different grades of groundwater pollution risk were computed. The evaluation results show that the groundwater pollution risk is determined by the combined action of pollution sources and groundwater vulnerability. The established risk assessment method of groundwater pollution could give a scientific support for the regional groundwater pollution prevention and control planning. © (2012) Trans Tech Publications, Switzerland.


Bai L.,Chinese Research Academy of Environmental Sciences | Bai L.,Engineering Research Center for Groundwater Pollution Control and Remediation | Wang Y.,China National Environmental Monitoring Station | Fang H.,China University of Geosciences | And 5 more authors.
Water Science and Technology: Water Supply | Year: 2013

Current research on groundwater vulnerability is aimed mainly at groundwater pollution vulnerability (GPV), and the vulnerability of groundwater quantity is seldom considered. It is important to carry out the groundwater vulnerability evaluation for the management of groundwater resources. This paper presents evaluation models and methods for assessing groundwater quantity and pollution vulnerability. The models and methods were used to evaluate the groundwater vulnerability in the plain area of Baotou, Inner Mongolia, China. The groundwater quantity vulnerability was assessed by computing the groundwater recharge rate, and the GPV was evaluated by simulating the migration time for pollutants traveling from ground surface to the aquifer. The research results could provide scientific support for the management of regional groundwater resources, prevention and control of groundwater pollution. © IWA Publishing 2013.

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