学术
海潮及其影响下海岸带地下水位时间序列的周期性和滞后性
周训[1] 阮传侠[1,2] 方斌[1] 欧业成[3]
[1]中国地质大学水资源与环境学院,北京100083 [2]天津地热勘查开发设计院,天津300250 [3]广西北海水文工程矿产地质勘察院,北海536000
摘 要:
运用谱分析原理，对广西北海市海潮及受海潮影响的滨海含水层地下水位时间序列进行分析，求出海潮和观测孔水位变化的周期及地下水位滞后于海潮的时间，分析水位滞后时间与离海岸的垂直距离之间的关系。结果表明，北海市海潮和海岸带地下水位有约344．82h（14．37d）的长周期变化和约24．7h、12．5h的短周期波动，距海岸2175、2350、2375m的3个观测孔地下水位对海潮的滞后时间分别为5．5、6．25和7h，滞后时间随离海岸的距离增大大体上呈线性增加。[著者文摘]
文章出处:
《水文地质工程地质》-2006年33卷5期,79 -71-74,79页
栏目信息:
分 类 号:
文献标识码:
A
文章编号:
1000-3665（2006）05-0071-04
Period and lag of the time series of tide and groundwater levels affected by the tide in coastal aquifers
ZHOU Xun , RUAN Chuan-xia , FANG Bin , OU Ye-cheng , （ 1. School of Water Resources and Environment, China University of Geosciences, Beijing 100083, China ; 2. Institute of Tianjin Geothermal Investigation Development and Design, Tianjin 300250, China; 3. Beihai Institute of Hydrogeology, Engineering Geology and Mineral Resources in Guangxi, Beihai 536000, China）
Abstract:
Time series of the tide and tide-induced groundwater levels in coastal aquifers in Beihai, Guangxi, are analyzed using the spectrum method. The periods of the tide and groundwater levels at the observation boreholes and the time lags of the groundwater levels to the tide are obtained. The relationship between the time lags of the groundwater levels to the tide and the distances far from the coast is also described in this paper. The results indicate that the tide and the groundwater level in the coastal aquifers in Behai fluctuate with a long period of 14.37 days and short periods of 24.7 and 12.5 hours, and the time lags of the groundwater levels at the three observation wells （2175, 2350, and 2375 m far from the coast） to the tide are 5.5, 6.25 and 7.0 hours, respectively. The relationship between the time lag and the distance from the coast can roughly be described using a linear function.[著者文摘]
Key words:
coastal aquifer; tidal effect ; spectrum analysis ; period ; lag
基金资助:
教育部高等学校博士学科点专项科研基金项目（20020491001）
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