地理科学 ›› 2017, Vol. 37 ›› Issue (1): 148-153.doi: 10.13249/j.cnki.sgs.2017.01.018

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柴达木盆地盐湖卤水层给水度分布变化特征

赵全升1(), 胡舒娅2, 冯娟1, 张建伟1   

  1. 1.青岛大学环境科学与工程学院,山东 青岛 266071
    2.吉林大学环境与资源学院,吉林 长春 130012
  • 收稿日期:2016-06-13 修回日期:2016-10-24 出版日期:2017-01-15 发布日期:2017-01-15
  • 作者简介:

    作者简介:赵全升(1963-),男,山东青州人,教授,博士,主要从事盐湖水文地质研究。 E-mail:zqs0811@sina.com

  • 基金资助:
    国家自然科学基金项目(41202175)资助

Distribution and Variation Characteristics of Specific Yield in Brine Aquifer of the Saline Lake in Qaidam Basin

Quansheng Zhao1(), Shuya Hu2, Juan Feng1, Jianwei Zhang1   

  1. 1.Department of Environmental Science and Engineering, Qingdao University, Qingdao 266071, Shandong, China
    2.College of Environment and Resources, Jilin University, Changchun 130021, Jilin,China
  • Received:2016-06-13 Revised:2016-10-24 Online:2017-01-15 Published:2017-01-15
  • Supported by:
    National Natural Science Foundation of China (41202175).

摘要:

选择柴达木盆地马海盐湖作为研究对象,在研究区布置给水度采样点11处,采样深度1.61~148.5 m,采集给水度样品75件。结合研究区以往37处采样点的72个测试数据,共计取得48处采样点145个测试数据。根据给水度实测数据,采用数理统计方法分析了柴达木盆地马海盐湖卤水层给水度分布变化。其主要特征表现为:① 给水度在水平方向上表现出较大的差异性,卤水层W至W的给水度分别介于0~0.263 5、0.009 4~0.209 9、0~0.277 8、0.006 2~0.135 9、0~0.107 7。在采样点MHK-022~MHK-026处,各卤水层给水度值较小,均小于0.06。在盐湖东北部,各卤水层给水度值较大,均大于0.08。给水度在垂直方向上受地层静压力的影响随着深度的增加而减小,上部卤水层W的给水度均值为0.105,下部卤水层W的给水度均值已降至0.038 7,不足卤水层W给水度均值的40%。给水度在垂直方向上还表现出旋回性的变化特征,这种沉积旋回的出现可能是对成盐期间气候波动的反映。

关键词: 马海盐湖, 卤水层, 给水度, 分布变化

Abstract:

Select the Mahai Saline Lake in Qaidam Basin as an object of study. A total of 75 specific yield samples were collected from 11 sampling points in the research area, and the depth range is 1.61-148.5 m. The previous testing data of 72 specific yield samples were collected from 37 sampling points in the research area were obtained. We totally got 145 specific yield samples from 48 sampling points. According to the measured specific yield data, adopting mathematical statistics methods to analyze the qaidam basin mohair salt lake brine formations, distribution of water level changes. The specific yield in brine aquifer characteristics of distribution and variation of the saline lake in Qaidam Basin is studied by statistical analysis. It is found that: 1) There are larger difference of specific yield in the horizontal direction. The data of W to W brine aquifer are between 0-0.263 5, 0.009 4-0.209 9, 0.006 2-0.135 9, 0.006 2-0.135 9, 0-0.107 7. The specific yield of different brine aquifers have smaller values in the sample point MHK-022 to MHK-026, and the average is less than 0.06. While in the northeast of the salt lake, the specific yield of different brine aquifers have bigger values and the average is greater than 0.08. 2) Specific yield in the vertical direction affected by the hydrostatic pressure of strata. With the increase of the depth the specific yield were decreases. 3) Specific yield in the vertical direction also shows cyclicity change characteristics. The emergence of the depositional cycle may be right to reflect climate fluctuations during the period of the salt deposits.

Key words: Mahai Saline Lake, brine aquifer, specific yield, distribution variation

中图分类号: 

  • P62