摘要
Ghyben-Herzberg公式依赖潜水位确定海岸带咸淡水界面位置,被广泛应用但存在误差。Hubbert公式严格描述突变界面问题的水头和界面位置之间的关系,但在实际中难以应用。通过考察咸淡水界面之下咸水带任意点的压力平衡关系和咸水带及淡水带任意点的水头描述得知,当地下水流处于稳定状态且满足Dupuit假设时,可以根据同一垂直线上界面之下咸水带任意点(含界面)的咸水测压水头和界面之上淡水带任意点(自潜水面至界面)的淡水测压水头确定滨海均质各向同性潜水含水层咸淡水界面的位置。Ghyben-Herzberg公式是这一方法的特例,描述界面位置的Hubbert公式也是该方法的一个特例。这一方法需要两个相邻的分别揭露淡水带和咸水带的测压孔。
The Ghyben-Herzberg relation is widely used in determination of the location of fresh water-salt water interface based on the water table in a coastal zone but error exists in the results obtained. The Hubbert relation strictly describes the relationship between the heads and the location of the interface related to a sharp interface problem but is difficult in practical application. Examination of the equilibrium status of a point in the salt water zone and the description of piezometric heads at two points in both the salt water and fresh water zones reveals that the location of the fresh water-salt water interface in a coastal homogeneous, isotropic unconfined aquifer can be estimated based on piezometric heads at two points in the same vertical line tapping respectively the salt water zone （ including the interface） and the fresh water zone （ from the water table to the interface） when the ground- water flow system is in a steady state and satisfies the Dupuit assumption. The Ghyben-Herzberg relation is a special case of the method and the Hubbert relation is also a special case of the method. This method requires two nearest piezometric wells which respectively tap the fresh water and salt water zones.
出处
《现代地质》
CAS
CSCD
北大核心
2008年第1期123-128,共6页
Geoscience
基金
教育部科学技术研究重点项目(105032)
教育部博士学科点专项科研基金项目(20070491522)
