| 摘要: |
| 在博斯腾湖水文和水化学实测资料的基础上,研究了博斯腾湖水盐的年际和年内变化.近 40年来,水质年际变化经历了好→中→差→中的过程;年内变化与区内最大补给源开都河不同季节河流来水量变化以及湖周农田排盐水等因素直接相关,而湖水的矿化度与水位变化呈负相关.对湖水主要离子含量变化特点和湖区矿化度变化规律的研究表明,湖水补给源及湖水循环状况是影响湖水水质变化的主要因素. |
| 关键词: 博斯腾湖 水盐变化 |
| DOI：10.18307/2002.0305 |
| 分类号: |
| 基金项目:国家自然科学基金(90102007);中国科学院知识创新项目(KZCX1-08-03)资助项目 |
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| On the Water-Salt Change of Bosten Lake in Xinjiang |
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LI Weihong1, YUAN Lei2
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1.Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, P.R. China;2.Xinjiang Environmental Monitoring Station, Urumqi 830011, P.R.China
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| Abstract: |
| Bosten Lake isone of the biggest freshwater lakes in China.On the basis of in situ hy drological and hy dro-chemical data of Bosten Lake, this paper discusses the annual and seasonal change of water saltof Bosten Lake in detail.During the past 40 years or so, The lake water has undergone an annual changing process and the seasonal change is closely related to the water discharge coming from Kaidu River thatis the largest water source supplying for the Bosten Lake.The farmland drainage contains salt around the Lake.The change of mineralized deg ree in the lake is negatively correlated with the water levelin the pasr 40 years, i.e.when the water levelis lower, the lake mineralized deg ree is higher.With the increase of ion content, Ca2+ and Mg2+ increase slow ly, while the contents of SO42-, Cl-and K++Na+ show markable increase.The descending ion contentorder is SO42->Cl->HCO3->K++Na+ >Mg2+ > Ca2+ >CO32-, and its proportion may differ with the sampling positions in the lake.The hydro-chemical ty pe is SO4Na.The lake water sources and lake water circulation are the main factors that have impacts on the change of lake water quality.The measurement for improving Bosten lake water eco-environment are suggested as follows:farmland irrigation quota should be reduced, river water amount flowing into Bosten Lake be promised, the groundwater resources utilization in the Yanji Basin be sped-up, and the lake water circulation intensity streng thened. |
| Key words: Bosten Lake water level change mineralized degree |
