利用地下水潮汐效应估算含水层参数及预测水位变化  

The estimation of aquifer parameters and water table changes using tidal effect in a coastal aquifer

作　　者：王学静[1] 李海龙[1] 柳富田[2] 王超月[1] 

机构地区：[1]中国地质大学(北京)水资源与环境学院,北京100083 [2]天津地质调查中心,天津300170

出　　处：《工程勘察》2013年第9期28-31,89,共5页Geotechnical Investigation & Surveying

基　　金：国家自然科学基金杰出青年项目(No.41025009)

摘　　要：滨海含水层中地下水位随海潮的周期性变化包含了重要的水文地质信息。而潮汐及地下水等动态资料分析的难点在于如何使得短时间序列数据的分析结果能够满足和反映较长时间的实际情况而不丢失必要信息。本文根据Fourier谱分析并结合海潮固有周期确定观测海潮数据的主要频率,利用最小二乘法确定实际海潮周期项函数,基于已有的地下水与海潮关系模型,对观测井中地下水位动态资料进行分析,利用最小平方罚函数法估算研究区含水层参数。根据上述确定的海潮和地下水波动模型,对研究区的海潮以及地下水水位变化进行验证和预测。验证和预测结果表明,本文分析确定的海潮以及地下水波动模型总体上能较好的反映实际变化特点。The tidal periodic changes of groundwater level in coastal aquifers contain important hydrogeological information,and the analysis difficulty of tidal and groundwater dynamic data is that how to reflect a long time actual situation from the short time data analysis results and no necessary information lost.In this paper,the main frequency of tidal observation was determined through the Fourier spectrum analysis and the tidal natural period;the tidal periodic function was determined by minimum square method;the dynamic groundwater level was analyzed based on an existing model;and the aquifer parameters can be estimated by the least-squares estimate method.The model of groundwater and tidal fluctuation determined by above method can be used to predict and analyze the changes of tide and groundwater level.Comparing the actual data and the prediction result,it is indicated that the model of water level and groundwater fluctuation presented in this paper could reflect the actual changing characteristics generally.

关 键 词：潮汐效应 地下水位变化 FOURIER谱分析 最小平方罚函数法 含水层参数估算 

分 类 号：P641.2[天文地球—地质矿产勘探]