深井水位固体潮的相位差问题

ON PHASE SHIFT IN OBSERVATION OF TIDAL FLUCTUATION IN A DEEP WELL

P.Melchior教授和蔡祖煌等先后指出,深井水位固体潮与引潮力位之间的相位差为180°。本文根据固体潮理论论述了深井水位固体潮的相位差,给出了京14井井水固体潮的相位差;O_1波,178°;M_2波,150°。文中还从井孔含水层系统对引潮位的非弹性响应出发,结合水文地质学,讨论了影响深井水位固体潮相位差的主要因索。结果表明,深井水位固体潮的相位差是由井孔含水层系统对引潮位的非弹性响应所致;它依赖于潮波频率、井孔半径、含水层厚度以及含水岩层的渗透率和储水率。最后,通过数值计算,模拟了井孔半径、含水层厚度和渗透率对井水固体潮相位差的影响。

As pointed out by Prof. P. Melchior and Prof. Cai Zuhuang, the phase differences between well tide and fide-generating potentials are 180°. On basis of earth tide theory, phase shift in observation of tidal fluctuation in a deep well is discussed here and the observation results of the well No. 14 in Beijing are given: O_1,178°; Mz, 150°. Also main effects on phase shift in observation of well tide are discussed according to inelastic response of a well-aquifer system to tide-generating potentials and knowledge of hydrogeology. It is concluded that a phase shift in observation of well tide result from inelastic response of a well-aquifer system to tide-generating potentials and that the phase shift depends on tidal frequency,radius of well, thickness of aquifer, permeability of aquifer and specific storage of aquifer.Moreover, influence of radius of well, thickness of aquifer and permeability on phase shift in observation of well tide is simulated numerically.