首页 | 本学科首页   官方微博 | 高级检索  
     检索      

三峡水库坝前水体水化学及溶解无机碳时空分布特征
引用本文:吴起鑫,韩贵琳,唐杨.三峡水库坝前水体水化学及溶解无机碳时空分布特征[J].环境科学学报,2012,32(3):654-661.
作者姓名:吴起鑫  韩贵琳  唐杨
作者单位:1. 中国科学院地球化学研究所,环境地球化学国家重点实验室,贵阳550002/中国科学院研究生院,北京100049
2. 中国科学院地球化学研究所,环境地球化学国家重点实验室,贵阳550002
基金项目:中国科学院知识创新重要方向项目(No.KZCX2-YW-QN109);国家自然科学基金(No.40973088,40721002)
摘    要:以三峡水库坝前水体为研究对象,分析了三峡水库蓄水至145m和172m水位时坝前垂向水体基本物理化学参数、主量元素、溶解无机碳(DIC)含量及其碳同位素(δ13CDIC)分布特征.研究结果表明,无论夏季还是冬季,坝前水体均没有出现水温分层现象,pH、电导、溶解氧也没有发生分层现象.坝前水体水化学组成主要受碳酸盐岩风化的控制,主量元素、溶解无机碳含量和三峡大坝截流前相比没有发生明显的变化.水体δ13CDIC值夏季(丰水期)低于冬季(枯水期),在垂向上变化不明显,与水库、湖泊δ13CDIC的时空变化特征相异而与自然河流的变化特征相似.目前,三峡水库坝前水体水化学特征主要表现出自然河流的特征,水库"湖沼学反应"还不明显.

关 键 词:三峡水库  水体分层  主量元素  溶解无机碳  碳同位素
收稿时间:5/4/2011 12:00:00 AM
修稿时间:2011/6/21 0:00:00

Temporal and spatial variation of water chemistry and dissolved inorganic carbon isotope characterization in Three Gorges Reservoir
WU Qixin,HAN Guilin and TANG Yang.Temporal and spatial variation of water chemistry and dissolved inorganic carbon isotope characterization in Three Gorges Reservoir[J].Acta Scientiae Circumstantiae,2012,32(3):654-661.
Authors:WU Qixin  HAN Guilin and TANG Yang
Institution:1. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002;2. Graduate University of Chinese Academy of Sciences, Beijing 100049;State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002;1. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002;2. Graduate University of Chinese Academy of Sciences, Beijing 100049
Abstract:Water samples upstream the Three Gorges Dam(TGD) were collected in July(summer) and December 2009(winter) to determine the basic chemical and physical parameters,concentrations of major ions,and contents and isotopic values(δ13 CDIC) of dissolved inorganic carbon(DIC).The results showed that the stratification of water temperature,pH,EC and dissolved oxygen has not been detected in the water column.The chemical composition of studied water samples in Three Gorges Reservoir was characterized by the dominance of Ca2+ and HCO-3,which is mainly controlled by weathering of carbonate rocks due to the widespread of these rocks in the upper Yangtze River catchment.Compared with the data in 2003 when the Three Gorges Dam was not fully completed,the concentrations of major ions and DIC in 2009 were not significantly varied.The δ13 CDIC values of the water samples in summer were lower than those in winter,and didn’t show significant variation with the increase of water depth,which is similar to the characteristics of natural rivers but different from the other reservoirs and lakes.At the present study,the hydrochemical characteristics of waters in the main river channel of Three Gorges Reservoir exhibited the feature of natural river rather than traditional reservoir.
Keywords:Three Gorges Reservoir  temperature stratification  major ions  dissolved inorganic carbon  carbon isotope
本文献已被 CNKI 万方数据 等数据库收录!
点击此处可从《环境科学学报》浏览原始摘要信息
点击此处可从《环境科学学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号