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引用本文:谭红兵,刘兴起,于升松,吕亚萍.格尔木河中下游-达布逊湖段水化学变化特征研究.湖泊科学,2001,13(1):43-50. DOI:10.18307/20010107
TAN Hongbing,LIU Xinqi,YU Shengso ng,LU Yaping.Character of Hydrochemistry in Golmud River-Dabsan Lake Water. J. Lake Sci.2001,13(1):43-50. DOI:10.18307/20010107
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格尔木河中下游-达布逊湖段水化学变化特征研究
谭红兵, 刘兴起, 于升松, 吕亚萍
中国科学院盐湖研究所, 西宁 810008
摘要:
1999年8月对格尔木河-达布逊湖流域进行了系统考察,并对其地表水体取样分析后发现,河水水化学分布空间上从源头至湖中逐渐咸化,表现出明显的地貌分区性特征,且东河段水质异常咸化;时间上河水矿化度总体表现为逐年上升的趋势,湖水则相对稳定.作为流域农牧业发展的水源地和近几年格尔木市移民建设的重点地区,其地表水体水化学的时空异常变化应引起足够的重视.
关键词:  格尔木河  达布逊湖  水化学特征
DOI:10.18307/20010107
分类号:
基金项目:中国科学院湖沼专项特别支持项目(ZKHZ-04)
Character of Hydrochemistry in Golmud River-Dabsan Lake Water
TAN Hongbing, LIU Xinqi, YU Shengso ng, LU Yaping
Qinghai Institute of Salt Lake, Chinese Academy of Sciences, Xining 810008, P. R. China
Abstract:
In August, 1999, w e investigated Golmud River-Dabsan Lake field and sampled systimatically from surface water along the river from the source-Kunlun Moutian to the end-Dabsan Lake.After that, we analysed the principal chemical composition of the river water and calculated some parameters such as mineralization, and types of hydrochemistry and so on.According to the fluctuation of mineralization along the river from south to no rth, five different reg ions may be distinguished:(1)region Ⅰ:gobi;(2)region Ⅱ;alluvial-pluvial fan;(3)region Ⅲ:alluvial-pluvial plain;(4)region Ⅳ:lacustrine plain;(5)region Ⅴ:brine lake, among which region Ⅱ can also be divided into two sub-regions:(Ⅱ1)the part of w est river of alluvial-pluvial fan and (Ⅱ2) the part of the east river of alluvial-pluvial fan.From region Ⅰ to region Ⅴ, the mineralization increased as a w hole.There appears an abno rmal high value in sub-region Ⅱ2, due to the disturbing as the shallow g round w ater has relatively higher salt content.The g round water level is so shallow as to reach the surface of earth, a great amount of salts w ere dissolved from soil by shallow phreatic water and then flowed into river, which made primitive fresh river water became half brine, the type of hydrochemistry changed suddenly from CNa to CNa.From this region tow ard the lake, the river discharge had no great change except for region Ⅲ.The hydrochemistry of region Ⅳ w as nearly the same as in the region Ⅲ except that the mineralization w as somew hat lower.As fo r region Ⅴ, the Dabsan Lake became a brine lake due to its long histo ry of evolution.Origionally the region Ⅴ was a play a as a dissolution basin.Under the condition of ex treme arid climate as w ell as high evaporation a brine lake came into being. Generally, the hydrochemistry of west river w as more stable than that of the east river.The adjustment capacity of west river w as better and does no t easy to be disturbed by other water.In the long run, future harnessing of water resource should lay stress on the part of the west region, mean while some measures should be taken to keep the half brine water of east river from any further salilization.
Key words:  Golmud River  Dabsan Lake  hy drochemistry
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