文章摘要
刘景兰,李立伟.基于转移概率的三维水文地质结构划分[J].矿产勘查,2020,11(8):1754-1758
基于转移概率的三维水文地质结构划分
Division of 3D hydrogeological structure based on transfer probability
投稿时间:2020-03-27  
DOI:
中文关键词: 地下水  城市供水  水文地质结构  Markov链  含水层  结构模型  天津市
英文关键词: groundwater,Tianjin, hydrogeological structure,Markov Chain,aquifer,structural model,urban water supply
基金项目:1∶5万淮淀乡幅、汉沽幅、塘沽区幅、蛏头沽幅、新城乡幅水文地质调查(编号:国土房任[2014]28号)资助。
作者单位
刘景兰 天津市地质研究和海洋地质中心,天津 300170 
李立伟 天津市地质研究和海洋地质中心,天津 300170 
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中文摘要:
      地下水是天津市重要的供水水源,构建三维水文地质结构,分析污染物迁移规律,成为近年来 “双源”管控工作的重点之一。本文在收集天津市滨海地区123个钻孔资料的基础上,结合区域水文地质条件,通过建立基于Markov链的多元地质统计方法,对水文地质层进行划分,建立了550m以浅地层的三维水文地质结构模型。研究发现区内含水介质以细砂占比最大,含水层沉积环境多以河流冲积成因为主。区内地层在垂向分布上具有粘性土与砂性土的互层式结构,集中发育的砂层是各含水岩组供水能力的主要影响因素。验证结果表明,该方法可以较为真实地刻画出研究区的三维地质结构,该模型可为区域地下水污染防控提供基础数据,保障城市供水安全。
英文摘要:
      Groundwater is an important source of water supply in Tianjin. In recent years, the work of construction of three- dimensional hydrogeological structure and analysis of pollutant transport law bacome one of the focuses of “dual-source” management work. Based on the data of 123 boreholes in Binhai area of Tianjin, combined with regional hydrogeological conditions, through the establishment of multivariate geostatistics method based on Markov chain, hydrogeological layers are divided, and the three-dimensional hydrogeological structure model of the shallow strata of 550m is established. It is found that the proportion of fine sand is the largest in the water medium, the sedimentary environment of aquifer is mainly River alluvial. The stratum has an inter layer structure of cohesive soil and sandy soil in the vertical distribution, and the doncentrated sand layer is the main influencing factor of water supply capacity of each water bearing formation. The verification results show that the method can depict the three-dimensional geological structure of the research area more truthfully. The model can provide technical support for the prevention and control of regional groundwater pollution.
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