摘要
本文以地表水潮汐影响承压井水位的偏微分方程为基础,考虑到井孔和含水层之间相互渗流的边界条件,得出方程的解。通过对解中水井含水层参数给予一些可能的值进行数值计算,绘出了承压井水位地表潮汐荷载效率与位相滞后曲线,讨论了这个效率和位相滞后水井含水层参数之间的关系。认为这个效率主要取决于含水层的孔隙度和固体骨架压缩系数;孔隙度愈小,压缩系数愈大,则效率也愈大。而位相滞后主要取决于含水层的渗透系数和厚度;这两个参数越大,则位相滞后越小。 本文还介绍了上海地区地下水位与地表水潮汐的观测结果。把这些观测结果和本文理论结果比较分析,两者符合得较好。
Starting from the partial differential equations describing the influence by the tidal effects of surface water on the level in the compressed wells, and jointly considering the boundary conditions for the mutual permeation between the wells and the aquifer, this paper obtains solution for the aforementioned equations. Through calculating the possible values of the aquifer parameters of the well in the solution, curves are plotted to show the tidal-loading efficiency of the water level in the compressed wells as well as their phase lags. The paper then discusses the relations between the tidal-loading efficiency, the phase lags and the well aquifer parameters. It is concluded that such tidal-loading efficiency is mostly determined by the porosity of the aquifer and the compression coefficient of the solid frames, i. e. smaller porosity and greater compression coefficient tend to yield higher tidal-loading officiency. The phase lags are mostly determined by the permeation coefficient and thickness of the aquifer, i. c. greater values of those 2 parameters will cause smaller phase lags.The paper also introduces the result from observations on the ground water level and the surface water tides obtained in Shanghai area. Those observational results agree quite well with the, theoretical results described in this paper
出处
《地震研究》
CSCD
北大核心
1990年第4期377-388,共12页
Journal of Seismological Research
基金
地震科学联合基金
关键词
地表水
潮汐
承压井
水位
渗流
Pressure-loaded well
Well level
Surface water tides
Response
Permeation
Aquifer parameters
Phase lags
