›› 2017, Vol. 38 ›› Issue (5): 1359-1364.doi: 10.16285/j.rsm.2017.05.017

• 基础理论与实验研究 • 上一篇    下一篇

一种长期观测资料确定弱透水层参数的方法

庄 超1,周志芳1,韩江波2   

  1. 1. 河海大学 地球科学与工程学院,江苏 南京 210098; 2. 南京水利科学研究院 水文水资源与水利工程科学国家重点实验室,江苏 南京 210029
  • 收稿日期:2015-06-15 出版日期:2017-05-11 发布日期:2018-06-05
  • 通讯作者: 周志芳,男,1962年生,博士,教授,主要从事水文地质和水文水资源等方面的研究工作。E-mail: zhouzf@hhu.edu.cn E-mail:zchao1990@hhu.edu.cn
  • 作者简介:庄超,男,1990年生,博士生研究生,主要从事地下水资源方面的研究工作。
  • 基金资助:

    国家自然科学基金资助项目(No. 41572209);国家重点研发计划项目(No. 2016YFC0402803);中央高校基本科研业务费专项资金资助项目(No. 2017B40514)。

A method for estimating aquitard parameters using long-term monitoring data

ZHUANG Chao1, ZHOU Zhi-fang1, HAN Jiang-bo2   

  1. 1. School of Earth Sciences and Engineering, Hohai University, Nanjing, Jiangsu 210098, China; 2. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing, Jiangsu 210029, China
  • Received:2015-06-15 Online:2017-05-11 Published:2018-06-05
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (41572209), the National Key Research and Development Program of China (2016YFC0402803) and the Fundamental Research Funds for Central Universities (2017B40514).

摘要: 弱透水层是含水层系统的重要组成部分,要准确计算弱透水层释水量和变形量需事先确定弱透水层的渗透系数和贮水率值。基于一维含水层系统概念模型,在相邻含水层降深随时间线性增大的边界条件下,推得了无量纲形式的弱透水层降深解析解,分析了弱透水层中滞后降深消散规律。根据水量均衡方程得到了弱透水层累计压缩变形量随时间变化的标准曲线,并提出了一种配线法用以确定弱透水层的渗透系数和贮水率,该配线法能够反映弱透水层释水变形过程的滞后性。以上海含水层系统为例,运用配线法确定了f10-7分层标处第2弱透水层的渗透系数为4.26 m/s,贮水率为2.22 。对于具有长序列变形和水位观测资料的含水层系统,该方法具有一定的适用性。

关键词: 弱透水层, 水力参数, 解析解, 配线法

Abstract: Aquitards are an important part of an aquifer system. Hydraulic properties of an aquitard, such as hydraulic conductivity and specific storage must be determined before the investigation of strata deformation and groundwater depletion. Based on the proposed one-dimensional schematic diagram of an aquifer system, a dimensionless analytical solution for flow in the aquitard is derived under the boundary condition of drawdown in adjacent aquifers showing a linear increase with time. The dissipation process of time-lag drawdown in the aquitard is analyzed. The type curve of cumulative aquitard compaction versus time is derived based on the mass balance equation of water. A new type curve method is further derived for estimating the hydraulic conductivity and specific storage of the aquitard. The type curve method reflects the time-lag drainage within the aquitard. This method is tested by a field application to the Shanghai aquifer system to obtain the hydraulic parameters of the second aquitard at the f10-7 extensometer site. Field test results show that the hydraulic conductivity and specific storage are 4.26 m/s and 2.22 , respectively. For an aquifer system with long-term observed water level and deformation data, the new type curve method can be used to some extent.

Key words: aquitard, hydraulic parameters, analytical solution, type curve method

中图分类号: 

  • TU 473.1

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