摘要
基于2015年雅鲁藏布江流域丰枯两季监测数据并结合现有研究成果,探究了该流域近50年水化学时空特征的演变及其影响因素。结果表明:流域中阳离子的总质量浓度丰水季节均低于枯水季节,并且自流域上游到下游其季节性差异逐渐变小;近50年,雅鲁藏布江流域中水化学类型的变化不明显,主要离子类型为HCO~-_3-Ca~(2+)型,Ca~(2+)和HCO~-_3的质量浓度均呈增大趋势,增幅分别约为2.5、1.9 mg/(L·10年);河水中离子来源方式由碳酸作用下的碳酸盐岩风化为主向碳酸作用和硫酸作用下的碳酸盐岩风化共同控制转变,并且硫酸作用下的碳酸盐岩风化在丰水季节逐渐增强。
Based on the monitoring data of the two seasons of abundance and dryness in the Yarlung Tsangpo River Basin in 2015 and combined with the existing research results,the evolution of the water chemistry temporal and spatial characteristics of the basin in the past 50 years and its influencing factors are explored.The results are as follows.Firstly,the total mass concentration of cations in the basin during the abundance season was lower than that of the dryness season,and the seasonal difference from upstream to downstream in the basin gradually becomes smaller.Secondly,in the past 50 years,the chemical type of water in the Yarlung Tsangpo River Basin has not changed significantly,and the main ion type is HCO-3-Ca 2+.The mass concentrations of Ca 2+and HCO-3 both show an increasing trend,with a decade increase of about 2.5 mg/L and 1.9 mg/L,respectively.Thirdly,the source of ions in the river water changes from the weathering of carbonate rocks under the action of carbonation to the joint control of the weathering of carbonate rocks under the action of carbonation and sulfate,and the weathering of carbonate rocks under the action of sulfate gradually increases during the abundance season.
作者
汪磊
杨剑
王兆涵
韩宇平
WANG Lei;YANG Jian;WANG Zhaohan;HAN Yuping(College of Water Resources,North China University of Water Resources and Electric Power,Zhengzhou 450046,China;Henan Key Laboratory of Water Resources Conservation and Intensive Utilization in the Yellow River Basin,Zhengzhou 450046,China)
出处
《华北水利水电大学学报（自然科学版）》
北大核心
2021年第2期10-16,共7页
Journal of North China University of Water Resources and Electric Power：Natural Science Edition
基金
国家自然科学基金项目(41807161,51679089)。
关键词
雅鲁藏布江
水化学特征
离子来源
化学风化
Yarlung Tsangpo
water chemistry characteristics
ion source
chemical weathering
