| 疏勒河上游地表水水化学主离子特征及其控制因素 |
| 摘要点击 3150 全文点击 1706 投稿时间：2014-01-18 修订日期：2014-03-28 |
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| 中文关键词 地表水 主离子 水化学类型 疏勒河上游 补给 |
| 英文关键词 surface water major ion hydrochemical type the upper reach of Shule River recharge |
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| 中文摘要 |
| 在系统收集了疏勒河流域上游河水、地下水、降水和冰雪融水水样的基础上，综合运用描述性统计、Gibbs图和Piper阴阳离子三角图等方法，对疏勒河上游地表水中主离子组成特征及其控制因素进行了分析. 结果表明，流域内不同水体（大气降水、河水和地下水）之间的主离子组成以及水化学类型差异显著. 河水TDS的变化范围为51.7~432.3 mg ·L-1，平均值为177.7 mg ·L-1；河水中阳离子Ca2+、Mg2+的百分比为45%和31%，优势阴离子为HCO3-，占阴离子总量的75%，河水的水化学类型主要为HCO3--Ca2+-Mg2+型；河水中主离子浓度值介于大气降水和地下水之间，并且十分接近地下水浓度，说明地表水同时受大气降水和地下水补给并主要依靠地下水补给；地表水样品的水化学组成落在Gibbs分布模型的中翼偏左端，表明研究区的水化学离子组成受到岩石风化作用和蒸发结晶作用的共同影响，且岩石风化作用对水化学离子组成的影响更加显著. |
| 英文摘要 |
| To analyze the major ion chemistry of water in the upper reach of the Shule River Basin and possible controls, samples of river water, groundwater, precipitation, melt water were collected and methods including descriptive statistics, Gibbs Figure, Piper Triangular diagrams of anions and cations were comprehensive used. Results showed that the major ion compositions and hydrochemical types were significantly different in different waters such as stream water, groundwater and precipitation. The total dissolved solid (TDS) in the river water ranges between 51.7 to 432.3 mg ·L-1 with an average of 177.7 mg ·L-1. The major cations of river water are Ca2+ and Mg2+, accounting for 45% and 31% of the cations respectively. Meanwhile, HCO3- constituted about 75% of the anions. The hydrochemical type of river water is HCO3--Ca2+-Mg2+. Owing to the interaction between the river and layer, the concentration of SO42- is relatively higher. Comparing major ion concentrations of the river water with local groundwater and precipitation, concentrations of the river water ranged between precipitation and groundwater but were much closer to the concentration of groundwater, indicating that the surface water was recharged by a mixture of precipitation and groundwater while groundwater is dominant. The chemical composition of surface water samples located in the middle and a bit upper of Gibbs model, which indicates that the major chemical process of river water is controlled by rock weathering and evaporation-crystallization but rock weathering plays a much more important role. |
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