利用滨海地下水潮汐效应估计含水层参数:以北海半岛为例  

The estimation of aquifer parameters using tidal effect in a coastal aquifer:A case study in Beihai Peninsula,Guangxi China

作　　者：夏玉强[1,2,3,4] 李海龙[1,2,5] 

机构地区：[1]中国地质大学(武汉)环境学院 [2]教育部生物地质与环境地质重点实验室,湖北武汉430074 [3]美国天普大学土木与环境工程系 [4]环境水文学与水力学实验室,宾夕法尼亚费城19122 [5]中国地质大学(北京)水资源与环境学院,北京100083

出　　处：《地学前缘》2009年第6期276-281,共6页Earth Science Frontiers

基　　金：国家自然科学基金项目(40672167);高等学校学科创新引智计划"111计划"(B08030)

摘　　要：通过分析滨海含水层中观测孔的水位动态资料,确定含水层的水力性质和某些参数,或推测含水层在海底的延伸长度和露头处是否存在覆盖层,是水文地质学家一直很感兴趣的问题之一。文中充分分析了广西北海半岛滨海地区水文地质条件,将研究区第一个承压含水层系统概化为具有上覆弱透水层越流和含水层海底露头覆盖层的垂向三层结构的不稳定流模型。应用该模型的解析解对广西北海半岛滨海含水层系统的观测数据进行了分析,拟合效果很好,并利用最小平方罚函数法估算了研究区含水层的参数。How to estimate aquifer parameters or to confirm the extending length of the aquifer under the sea or the existence of the aquifer submarine outlet-capping via the analysis of the observed data of water level dynamic condition in observation well has attracted much attention from hydrogeologists.Based on the well acquaintance with the hydrogeological conditions in the Beihai Peninsula,Guangxi Autonomous Region,China,we can conceptualize the first confined aquifer in this area into a vertical three-layered non-stationary flow model with the aquifer submarine outlet-capping and the leakage through the aquifer＇s roof.The analytical solution to this model is applied to analyze the tidal and piezometer data in a coastal aquifer of the Beihai Peninsula in this paper.The aquifer parameters are estimated using least-squares objective function with novel penalty functions incorporating known information.The solution prediction closely fits with the observation very well.

关 键 词：滨海多层含水系统 海底露头覆盖层 潮汐效应 最小平方罚函数法 含水层参数估算 

分 类 号：P33[天文地球—水文科学]