摘要
利用自行研制开发的潮汐模拟自动控制系统,对潮汐影响下近岸地下水水位波动和周期平均地下水水位超高进行了试验研究.试验结果表明:近岸任意一点地下水水位随时间变化具有不对称性,水位上升比下降快;潮汐信号在地下水传播过程中会产生周期性的水位波动,随着离岸距离的增加,水位波动振幅衰减加快;潮汐在沿岸潜水层中形成的地下水水位超高最大可以达到含水层厚度的10%左右.潮汐的振幅和频率对近岸地下水水位超高有着重要的影响,在相同条件下频率对地下水水位超高的影响较振幅大;潮汐对地下水水位超高的影响还与近岸潜水层的厚度有关.
An automatic simulation system for tides developed by the authors was employed to study the tidal effects on the fluctuation of the groundwater table along the shore and the freeboard of the mean period groundwater table over height. The test results indicate that the fluctuation of the groundwater table along the shore at arbitrary points with time is asymmetric, and its increase is faster than its decrease. The tidal signals result in periodical fluctuation of the water table during the propagation of groundwater, and with the increase of distance away from the shore, the amplitude attenuation of fluctuation of the groundwater table increases. The largest freeboard of the groundwater table in unconfined aquifers induced by tides may reach about 10% of the thickness of the aquifers. The amplitude and frequency of tides have significant effects on the freeboard of the groundwater table along the shore. Under the same conditions, the frequency of tides has a greater effect on the freeboard than the amplitude of tides. Furthermore, the tidal effects on the freeboard of the groundwater table along the shore also relate to the thickness of the aquifers.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第2期228-231,共4页
Journal of Hohai University(Natural Sciences)
基金
国家杰出青年科学基金(50425926)
江苏省博士后科研资助计划(0701006B)
河海大学自然科学基金(2007417411)
关键词
潮汐
近岸
地下水
波动
水位超高
tide
along the shore
groundwater table
fluctuation
freeboard
