摘要
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2 h),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SO2-4含量最高,其次为NO-3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16∶00左右,各离子含量随降雨量的增加呈增加态势(除SO2-4、NO-3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.
This study focused on the diurnal variation of major ions in Baishui river around Yulong Mountain. Water samples were collected continuously from 22^th to 28^th September,2009,with a sampling interval of two hours. The samples were analyzed for their chemical composition,and the diurnal variation characteristics and pattern were investigated. The results showed that SO4^2-and NO3^-were the most abundant anions. Meanwhile water samples were mildly alkaline and were rich in Ca^2＋and Mg^2＋cations,which is different from the ion distribution in glacier melt water（ Ca^2＋〉Na^＋ 〉K^＋ 〉Mg^2＋）. It reflected the influence of bedrock lithology on the water chemistry in Mt.Yulong area. Mean pH value of the river water was 8. 6,and the conductively varied between 29. 9 to73. 5,which showed obvious diurnal fluctuation. The peak value of ion concentrations usually appeared at about 16 ∶ 00 each day,displaying positive correlations with the amount of rainfall（ except for SO4^2-,NO3^-） during the period of rainfall. With the increase of runoff,concentrations of most ion showed a decreased trend without rain.
出处
《环境化学》
CAS
CSCD
北大核心
2015年第10期1895-1900,共6页
Environmental Chemistry
基金
国家自然科学基金(41273010
41401083)
中国科学院重点部署项目(KJZD-EW-G03-04)
中国科学院寒区旱区环境与工程研究所人才基金(Y451181001)
中国博士后基金(2014M552517)
冰冻圈科学国家重点实验室自主课题(SKLCS-ZZ-2015-01-03)资助
关键词
玉龙雪山
白水河
水化学特征
日变化
Mt.Yulong
Baishui river
geochemistry characteristics
diurnal variations.
