摘要
以疏勒河源区为研究区,自2018年12月至2019年11月分别采集河水、泉水和雪样样品44个、4个和7个,综合运用Piper三线图、Gibbs图、离子比值法定性分析不同水体水化学特征及控制因素,利用质量平衡法(正向地球化学模型)量化不同来源对不同季节河水水化学成分的贡献率。结果表明:疏勒河源区不同水体水化学特征存在差异,TDS含量为泉水>河水>冰川融水>雪水,河水水化学类型冬季为HCO_(3)^(-)-Mg^(2+)·Ca^(2+)型,春季为HCO_(3)^(-)-Ca^(2+)·Mg^(2+)·Na^(+)型,夏、秋季均为HCO_(3)^(-)-Ca^(2+)·Mg^(2+)型,泉水和雪水分别为HCO_(3)^(-)-Ca^(2+)·Mg^(2+)型、HCO_(3)^(-)-Ca^(2+)型;受多种因素共同影响,不同季节河水主离子时空变化均存在差异;河水和泉水水化学组成受岩石风化作用控制,主离子来源于以白云石为主的碳酸盐岩风化、硅酸盐岩风化和盐岩、石膏、硫酸盐矿物等蒸发岩溶解;正向地球化学模型计算结果表明冬春季河水阳离子主要来源于硅酸盐岩风化溶解,夏秋季碳酸盐岩对河水阳离子贡献率大于硅酸盐岩,总体河水阳离子主要来源于碳酸盐岩和硅酸盐岩风化。
The source region of Shule River basin was selected as the study area,and the samples of river water,spring water and snow were collected between December in 2018 to November in 2019. Hydrochemical characteristics and controlling factors of different waters were analyzed qualitatively by Gibbs figure,Piper Triangular diagram and the ratio of ions. The contribution of rain(atmospheric),evaporite,carbonate,and silicate weathering in different seasons was quantified by mass budget equations of cations(the forward model). The results showed that the concentration of the total dissolved solids(TDS)was ordered by spring water>river water>glacier meltwater>snow water. Hydrochemical types of river water were HCO_(3)^(-)-Mg^(2+)·Ca^(2+)in winter,HCO_(3)^(-)-Ca^(2+)·Mg^(2+)·Na^(+)in spring and HCO_(3)^(-)-Ca^(2+)·Mg^(2+)in summer and autumn. Hydrochemical types of spring water and snow water were HCO_(3)^(-)-Ca^(2+)and HCO_(3)^(-)-Ca^(2+)·Mg^(2+),respectively. Due to the influence of many factors,the temporal and spatial variations of major ions in river water were different. Hydrochemical composition of river water and spring water was controlled by rock weathering,snow water was controlled by rock weathering and precipitation. The major ions of river water and spring water were derived from carbonate weathering which dominated by dolomite,silicate weathering and evaporite dissolution of halite,gypsum and sulfate minerals. The contribution of cations from atmospheric and rock weathering was different in different seasons. On the whole,the cations in river water were mainly derived from silicate weathering in winter and spring,the contribution ratio were 36.21% and 35.54%,respectively. The contribution ratio was ordered by carbonate>silicate>rain>evaporite in summer and carbonate>silicate>evaporite>rain in autumn. In general,the cations of river water mainly come from carbonate and silicate weathering.
作者
杨琴
韩添丁
李向应
秦甲
成鹏
蒲红铮
YANG Qin;HAN Tianding;LI Xiangying;QIN Jia;CHENG Peng;PU Hongzheng(State Key Laboratory of Cryospheric Science,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China;University of Chinese Academy of Sciences,Beijing 100049,China;Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity,Northwest University,Xi’an 710127,China;College of Urban and Environmental Sciences,Northwest University,Xi’an 710127,China;Key Laboratory of Ecohydrology of Inland River Basin,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China;Urumqi Meteorological Bureau,Urumqi 830002,China;School of Management,Chongqing University of Technology,Chongqing 400054,China)
出处
《冰川冻土》
CSCD
北大核心
2021年第2期568-579,共12页
Journal of Glaciology and Geocryology
基金
国家重点研发计划政府间国际创新合作专项(2018YFE010010002)
科技部科技基础资源调查专项(2018FY100502)
国家自然科学基金项目(41771040,41877156,41671053)
中国科学院战略性先导科技专项(XDA19070501)
甘肃省科技计划项目(20JR5RA545)
冰冻圈科学国家重点实验室开放基金项目(SKLCS-OP-2020-12)
重庆理工大学科研启动基金项目资助。
关键词
疏勒河源区
水化学
控制因素
贡献率
source region of Shule River
hydrochemistry
controlling factors
contribution ratio
