scholarly journals Predicted impacts of future water level decline on monitoring wells using a ground-water model of the Hanford Site

1994 ◽  
Author(s):  
S.K. Wurstner ◽  
M.D. Freshley
Keyword(s):  
Ground Water ◽  
Water Level ◽  
Water Model ◽  
Hanford Site ◽  
Monitoring Wells ◽  
Water Level Decline

Ground Water Monitoring in Areas Used for the Infiltration of Effluents from Chemical Industries

1987 ◽  
Vol 19 (8) ◽  
pp. 205-212
Author(s):  
L P. M. Poppe ◽  
R C. A. Cunha ◽  
E. Gloeden ◽  
D. C. Gomes ◽  
D. Cabrai Júnior
Keyword(s):  
Electrical Conductivity ◽  
Chemical Analysis ◽  
Computer Program ◽  
Ground Water ◽  
Water Level ◽  
Groundwater Pollution ◽  
Industrial Wastewater ◽  
Monitoring Wells ◽  
Land Disposal

In 1984, in Taubaté County, Brazil, a study was carried out to identify the groundwater pollution due to land disposal of chemical industrial wastewater. After characterization of the wastes, some analytical parameters were selected for a monitoring programme: TOC, COD and electrical conductivity. This programme was started after a network of 39 monitoring wells was installed. The water level was determined monthly and four times a year samples from the groundwater were collected for chemical analysis. The data were interpreted by a computer program (SYMAP) which produced hydrochemical and isopotential maps. The interpretation of these maps shows groundwater pollution due to wastewater infiltration and the limit of the pollution plume was the adjoining stream. In addition to determining the horizontal trend of pollution into the aquifer, research is necessary to verify vertical pollution, in order to evaluate the degree the aquifer has been compromised.

Ground-water flow analysis in the slope above Shum Wan Road, Hong Kong

2001 ◽  
Vol 7 (3) ◽  
pp. 239-250 ◽  
Author(s):  
S. Nandy ◽  
J. J. Jiao
Keyword(s):  
Ground Water ◽  
Water Level ◽  
Factor Of Safety ◽  
Ground Water Level ◽  
Water Model ◽  
Specific Yield ◽  
Clay Layer ◽  
Initial Water ◽  
Stability Analyses ◽  
Hydrogeological Study

Abstract On August 13, 1995, a slope above Shum Wan Road failed due to high rainfall and caused a 30-m section of Nam Long Shan Road to collapse. The slope consists of weathered tuffs with a clay layer on the surface of the failure. A hydrogeological study was carried out by saturated finite difference grid model, MODFLOW, for the slope at the Shum Wan Road area. From the ground-water model, it was found that the ground-water level reached three meters below the ground surface during failure. The model is sensitive to recharge and specific yield. The presence of the clay layer helped to maintain a high ground-water level. Stability analyses were performed using SLOPE/W. The result of stability analyses showed that the factor of safety, F, decreased due to the rising initial water table. On the 31st of July, the factor of safety was 1.41, and dropped down to 1.01 on the 3rd of August. The factor of safety again rose back to 1.31 on the 8th of August and it finally dropped down to 0.99 on the morning of the 13th of August. The present study showed that the antecedent rainfall had some influence on stability of the slope. The amount of water in the form of seepage, which drained out from the seepage surface from the lower part of the slope, is quantified and found to be 790 m 3 . Preventive measures can be taken by inserting horizontal pipes in the slope to drain out the ground water in the form of seepage or by covering the slope with shortcrete or chunam.

Sign in / Sign up

Export Citation Format

Share Document