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浙江大学学报（理学版）
浙江大学学报（理学版）  2019, Vol. 46 Issue (3): 364-369    DOI: 10.3785/j.issn.1008-9497.2019.03.015
地球科学     
基于镭同位素示踪的青海湖金沙湾沿岸地下水排放研究
刘磊, 苏维刚, 李霞, 冯丽丽, 赵玉红, 马震
青海省地震局, 青海 西宁 810001
Estimating groundwater discharge into Jinshawan via，Qinghai Lake Radium isotopic
Lei LIU, Weigang SU, Xia LI, Lili FEN, Yuhong ZHAO, Zhen MA
Qinghai Earthquake Administration , Xining 810001,China
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摘要： 青海湖作为我国内陆最大的咸水湖，针对其水域的研究具有重要的环境意义。采集青海湖金沙湾沿岸9个间隙水样，2个井水样，1个湖水样以及2个降水样。调查研究了青海湖金沙湾间隙水溶解态镭同位素活度的空间分布情况，发现间隙水中223Ra和224Ra的平均活度为3.5 dpm/100 L和162.6 dpm/100 L，均高于井水和湖水。通过对沿湖岸线水平向和垂直向的间隙水镭同位素活度分布研究发现，金沙湾间隙水镭同位素活度随离岸距离的增大而增大、随深度的加深而减小，这与湖水镭同位素活度随离岸距离的变化规律相反。结合镭同位素活度随盐度的变化，发现湖水与间隙水在离岸30 m左右发生了交换，交换深度在1 m以下。最后，通过水平涡动扩散模型估算了金沙湾沿岸表层地下水的排放通量为0.20 m3·m-2·d-1。
关键词： 金沙湾;  镭同位素;  间隙水;  地下水排放    
Abstract: Qinghai Lake is the largest inland saltwater lake in China. The research of its aqueous environment has important environmental implications. We collected 9 interstitial water samples, 2 groundwater samples, 1 lake water sample and 2 rainfall samples, and investigated the distributions of dissolved Ra of interstitial water in Jinshawan, Qinghai Lake. The activities of 223Ra and 224Ra were respectively 3.5 dpm/100 L and 162.6 dpm/100 L. The radium isotopes activity of interstitial water increases with the offshore distance in Jinshawan, which is in contrary to the case of lake. On the vertical distribution, isotope radium activity of interstitial water decreases with the increasing depth. In Jinshawan, Qinghai Lake,lake water and interstitial water exchange occurred at about 30 m offshore and at the depth below 1 m. By the radium isotopes horizontal eddy diffusion model ,we estimated groundwater discharge flux per square meter which is 0.20 m3·m-2·d-1.
Key words: Jinshawan    radium isotopes    interstitial water    groundwater discharge
收稿日期: 2018-08-30 出版日期: 2019-05-25
CLC:  P641.3  
基金资助: 青海省地震科学基金项目（2017A03）；中国地震局地震科技星火计划项目（XH16039）.
作者简介: 刘磊（1987-），ORCID:http://orcid.org/0000-0003-1733-5889 ,男，硕士，工程师，主要从事地下水化学及构造地球化学流动观测研究，E-mail:417777367@qq.com.
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刘磊
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引用本文:

刘磊, 苏维刚, 李霞, 冯丽丽, 赵玉红, 马震. 基于镭同位素示踪的青海湖金沙湾沿岸地下水排放研究[J]. 浙江大学学报（理学版）, 2019, 46(3): 364-369.

Lei LIU, Weigang SU, Xia LI, Lili FEN, Yuhong ZHAO, Zhen MA. Estimating groundwater discharge into Jinshawan via，Qinghai Lake Radium isotopic. Journal of ZheJIang University(Science Edition), 2019, 46(3): 364-369.

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https://www.zjujournals.com/sci/CN/10.3785/j.issn.1008-9497.2019.03.015    或    https://www.zjujournals.com/sci/CN/Y2019/V46/I3/364

1 MEN W,LIUG S,CHENZ G, et al. Progresses of radium isotopes applications to oceanography research[J]. Advances in Earth Science，2010, 25(1)：33-41.
2 BOLLINGERM S, MOOREM S. Radium flux from a salt marsh[J]. Nature, 1984,309(5967):444-446.
3 TODDJ F, BUTTSJ L, MOOREW S. A new method for the rapid measurement of 224Ra in natural waters[J]. Marine Chemistry, 1987, 22(1):43-54.
4 WEBSTERI T, HANCOCKG J, MURRAYA S. Modeling the effect of salinity on radium desorption from sediments[J]. Geochimica et Cosmochimica Acta, 1995,59(12):2469-2476.doi:10.1016/0016-7037(95)00141-7
5 NOZAKIY. Mean residence time of the shelf water in the East China and the Yellow Seas determined by 228Ra／226Ra measurements[J]. Geophysical Research Letters, 1989, l6(11):1297-1300.
6 MOOREW S. Determining coastal mixing rates using radium isotopes[J]. Continental Shelf Research, 2000, 20(15):1993-2007.doi:10.1016/s0278-4343(00)00054-6
7 MOOREW S. Application of 226Ra, 228Ra, 223Ra, and 224Ra in coastal waters to assessing coastal mixing rates and groundwater discharge to oceans[J]. Earth Planetary Sciences, 1998,107(4):343-349.
8 MA R J. Record of natural geography survey around Qinghai Lake[J]. Journal of Northwest Normal University, 1982(2):41-57.
9 MOOREW S. Sampling 228Ra in the deep ocean[J]. Deep Sea Research and Oceanographic Abstracts, 1976,23(7):647-651.
10 SUNY, TORGERSENT. The effects of water content and Mn-fiber surface conditions on 224Ra measurement by 220Rn emanation[J]. Marine Chemistry, 1998, 62(3/4):299-306．
11 MOOREW S. Radium isotope measurements using germanium detectors[J]. Nuclear Instruments Methods in Physics Research, 1984,223(2/3):407-411.doi:10.1016/0167-5087(84)90683-5
12 GARCIA-SOLSONAE, GARCIA-ORELLANAJ, MASQUéP,et al. Uncertainties associated with 223Ra and 224Ra measurements in water via a delayed coincidence counter (RaDeCC)[J]. Marine Chemistry, 2008,109(3/4): 198-219.doi:10.1016/j.marchem.2007.11.006
13 DINGY J,LIUF J. Estimating on water balance elements in the drainage basin of Qinghai Lake[J]. Arid Land Geography, 1993,16(4)：25-30.
14 QUY G.Water balance and forecasting of water level change in Qinghai Lake[J]. Journal of Lake Sciences, 1994,6(4)：298-307.doi:10.18307/1994.0402
15 YANH Y ,JIAS F.Water balance and water resources allocation of Qinghai Lake[J].Journal of Lake Sciences, 2003,15(1)：36-40.
16 WANGF, LIUJ, YANH Y.Analysis on hydrological process of water balance factors in Qinghai Lake[J]. Journal of Hydraulic Engineering, 2008,39(11):1229-1238.doi:10.3321/j.issn:0559-9350.2008.11.011
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