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环境化学  2015 

玉龙雪山周边典型河流的水化学日变化特征

Keywords: 玉龙雪山,白水河,水化学特征,日变化

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Abstract:

通过分析于2009年9月22日—28日期间,在玉龙雪山周边河流白水河采集的河水样品(采样间隔为2h),对冰雪融水补给径流的日变化特征及其规律进行了深入研究.结果表明,白水河水中所测的阴离子以SO42-含量最高,其次为NO3-和Cl-;阳离子中主要以Ca2+、Mg2+为主,其次为Na+、K+,不同于冰雪融水中的离子浓度序列Ca2+>Na+>K+>Mg2+,反映了流域内基岩岩性对河水化学性质的影响;水体的pH值平均8.6,电导率介于29.9—73.5μS·cm-1之间,日周期波动幅度较大;受降雨影响时段,各离子含量峰值通常出现在1600左右,各离子含量随降雨量的增加呈增加态势(除SO42-、NO3-外);在无降雨影响下,随径流量的增加,各离子含量表现出减小趋势.

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