US EPA

1283224 

Journal Article 

Characteristics of Piezometric heads and determination of fresh water-salt water interface in the coastal zone near Beihai, China 

Xun, Z; Haiyan, Z; Li, Z 

2008 

Yes 

Environmental Geology
ISSN: 0943-0105
EISSN: 1432-0495 

Springer Science+Business Media 

54 

1 (Mar 2008) 

67-73 

Changes in hydraulic heads with space and time and evolution of the location of fresh water-salt water interface are important for groundwater development in coastal aquifers. Measurements of piezometric heads at 11 well clusters consisting of three piezometric wells of different depths with a 5-day interval for 15 months show that the piezometric heads at nearly all the wells near the northwestern coast in Beihai decrease with increasing depth and increase with increasing distance from the coast. Changes in piezometric heads at the wells during the measurement period were caused by seasonal precipitation and induced by the tide. The depth of the sharp interface between fresh water-salt water can be estimated based on measurements of piezometric heads at a piezometric well tapping at a point in the salt water zone below the interface and measurements of the water table at the same well. The calculations of the interface for well H5 range from 40 to 80 m below sea level in the measurement period, which are believed to be more reasonable than those estimated with the Ghyben-Herzberg relation. 

ISEW, China, People's Rep., Guangxi, Beihai; China, People's Rep.; Saline Water; Ground water; Interfaces; Coasts; Hydraulics; Groundwater Potential; Coastal Aquifers; Water Table; Piezometric Head; Precipitation; Coastal zone