柴达木盆地昆特依盐湖大盐滩矿区潜水含水层的渗透性  

Permeability of Unconfined Aquifer Under the Dayantan Mine Area near the Kunty Salt Lake in the Qaidam Basin

作　　者：张岩[1,2,3] 高东林[1,3] 任倩慧[1,2,3] 李斌凯[1,3] 王明祥[1,3] 

机构地区：[1]中国科学院青海盐湖研究所,青海西宁810008 [2]中国科学院大学,北京100049 [3]青海省盐湖地质与环境重点实验室,青海西宁810008

出　　处：《干旱区研究》2017年第1期36-42,共7页Arid Zone Research

基　　金：中国科学院青海盐湖研究所"一三五"规划"培育"方向课题(Y560031008)资助

摘　　要：为探究潜水含水层中盐类矿物的固-液转化效应对含水层渗透性的影响,以补水背景下的昆特依干盐湖大盐滩矿区潜水含水层为研究对象,通过抽水试验计算矿区潜水含水层的渗透性,查明含水层渗透性的变化特征;并结合潜卤水水化学数据,分析盐类的固-液转化效应对含水层渗透性变化的影响。结果表明:1补水背景下,大盐滩矿区潜水含水层渗透性受含水层中盐类矿物固-液转化效应的影响,呈现波动性变化。2013年10月,含水层渗透系数最大(376.33 m·d^(-1));2014年3月,含水层渗透系数最小(78.65 m·d^(-1)),2014年6月和9月,渗透系数分别为195.34 m·d^(-1)和348.40 m·d^(-1),呈现逐步上升的趋势。2潜水含水层中芒硝的固-液转化是导致含水层渗透性波动变化的最直接因素。3潜水含水层渗透性变化趋势与SO_4^(2-)-Na+浓度曲线的变化趋势相符。In order to explore the effect of solid-liquid conversion of salt minerals on the permeability of the unconfined aquifer under the Kunty Mine Area in the Qaidam Basin,in this study the iterative computing methods were used to calculate the permeability of the unconfined aquifer and analyze the effect of solid-liquid conversion of salt minerals on the permeability based on analyzing the lithologic characters and the pumping test data. The results are as follows： 1 Under groundwater recharge,the permeability of the unconfined aquifer under the study area was fluctuated. The permeability coefficient reached a maximum of 376. 33 m·d^- 1in October 2013 and a minimum of78. 65 m·d^- 1in March 2014. In June and September 2014,the permeability coefficients were 195. 34 m·d^- 1and348. 40 m·d^- 1respectively,and it was in an increase trend; 2 The solid-liquid conversion of Glauber＇s salt was the most important factor causing the fluctuation of permeability of the unconfined aquifer; 3 The change trend of permeability of the unconfined aquifer conformed to the change curve of the SO4^2-- Na^＋concentration.

关 键 词：潜水含水层 渗透性 固-液转化 昆特依盐湖 柴达木盆地 

分 类 号：TS32[轻工技术与工程]