首页  |  本刊简介  |  编委会  |  投稿须知  |  订阅与联系  |  微信  |  出版道德声明  |  Ei收录本刊数据  |  封面
人类活动对漓江地表水体水-岩作用的影响
摘要点击 2536  全文点击 660  投稿时间:2017-03-26  修订日期:2017-04-19
查看HTML全文 查看全文  查看/发表评论  下载PDF阅读器
中文关键词  漓江  水-岩作用  硫酸侵蚀  硝酸侵蚀  岩溶碳汇  δ13CDIC
英文关键词  Lijiang River  water-rock interaction  sulfuric acid erosion  nitric acid erosion  karst carbon sink  δ13CDIC
作者单位E-mail
赵海娟 西南大学地理科学学院, 岩溶环境重庆市重点实验室, 重庆 400715
中国地质科学院岩溶地质研究所/国土资源部、广西岩溶动力学重点实验室, 桂林 541004 
18189538930@163.com 
肖琼 中国地质科学院岩溶地质研究所/国土资源部、广西岩溶动力学重点实验室, 桂林 541004 xiaoqiong-8423@163.com 
吴夏 中国地质科学院岩溶地质研究所/国土资源部、广西岩溶动力学重点实验室, 桂林 541004  
刘凡 中国地质科学院岩溶地质研究所/国土资源部、广西岩溶动力学重点实验室, 桂林 541004  
苗迎 中国地质科学院岩溶地质研究所/国土资源部、广西岩溶动力学重点实验室, 桂林 541004  
蒋勇军 西南大学地理科学学院, 岩溶环境重庆市重点实验室, 重庆 400715 jiangjyj@swu.edu.cn 
中文摘要
      人类活动对流域水质的影响受到越来越多的关注.为探讨人类活动对岩溶地表水体水-岩作用的影响,以受农业、工业、旅游业活动及城市发展综合影响的漓江流域为研究对象,于2016年7~11月采集河水样,分析水化学和δ13CDIC数据.结果表明:①漓江水化学类型为HCO3-Ca.在阴离子成分中,SO42和NO3-仅次于HCO3-,并且在漓江桂林至阳朔段,因城市及城镇分布密集,旅游业发达,浓度较高.②[Ca2++Mg2+]/[HCO3-]当量比值在1.01~1.51之间,[Ca2++Mg2+]/[SO42-+NO3-+HCO3-]比值在0.85~1.12之间,说明硫酸、硝酸参与了水-岩作用.③碳酸溶蚀碳酸盐岩的比例平均为75.89%.硫酸和硝酸溶蚀碳酸盐岩的比例平均为24.11%.硝酸、硫酸溶蚀碳酸盐岩的能力多雨期强于少雨期.此外,硫酸和硝酸溶蚀碳酸盐岩的比例从上游到下游呈波动增大趋势,最高值出现于灵川县城,最低出现于漓江上游的华江.④碳酸风化碳酸盐岩对HCO3-的贡献最大,平均为83.58%;其次为硫酸和硝酸风化碳酸盐岩,平均为14.24%;碳酸风化硅酸盐岩对HCO3-的贡献最小,平均为2.18%,华江和峡背碳酸风化硅酸盐岩对HCO3-的贡献较其他点突出,这与流域地质背景相符合.⑤δ13CDIC值介于-11.95‰~-7.61‰之间;通过端元混合模型估算的δ13CDIC-rock介于-14.24‰~-7.23‰之间.多雨期δ13CDIC值与δ13CDIC-rock值比较接近,少雨期δ13CDIC值明显重于δ13CDIC-rock13CDIC与δ13CDIC-rock之间存在一定差异,是由于受到水生植物光合作用的影响.
英文摘要
      The influence of human activities on karst surface water quality has received increasing attention. To explore the impact of human activities on water-rock interactions in karst surface water, water samples were collected from July to November in 2016 in the Lijiang River, which is dominated by human activities. The samples were analyzed for the hydrochemistryand the characteristics of δ13CDIC. The results show that:①The Lijiang River is mainly characterized by HCO3-Ca chemical composition.. The SO42- and NO3- concentrations are inferior to HCO3- concentrations in the anion composition; besides, the concentrations of SO42- and NO3- in the river between Guilin and Yangshuo are higher than in the other sampling sites, caused by tourism and urban development. ②Equivalent ratios of[Ca2++Mg2+]/[HCO3-] are between 1.01 and 1.51 and the equivalent ratios of[Ca2++Mg2+]/[SO42-+NO3-+HCO3-] are between 0.85 and 1.12, indicating that the sulfuric acid and nitric acid have participated in the water-rock interaction. ③The proportions of carbonic acid dissolving carbonate rocks range from 32.10%-98.01% with an average of 75.89%. The proportions of sulfuric acid and nitric acid dissolving carbonate rocks vary from 1.99%-67.90% with an average of 24.11%. The proportions of sulfuric acid and nitric acid dissolving carbonate rocks in the rainy period with an average of 24.31% is higher than in the brief rain period with an average of 23.88%. In addition, the proportions of sulfuric acid and nitric acid dissolving carbonate rocks present a fluctuated increasing trend from upstream to downstream and the maximum strength and the minimum strength of the sulfuric and nitric acid dissolving carbonate rocks occur in Lingchuan and Huajiang, respectively. ④ HCO3- mainly originated from the carbonate rocks dissolved by carbonic acid, with an average of 83.58%, followed by the carbonate rocks dissolved by sulfuric acid and nitric acid, with an average of 14.24%. The contribution of carbonic acid weathering silicate rocks is the smallest with an average of 2.18%. ⑤ δ13CDIC of the Lijiang River ranges from -11.95‰——7.61‰; the calculated δ13CDIC-rock using the mixture endmember model ranges from -14.24‰——7.23‰. δ13CDIC is close to δ13CDIC-rock in the rainy period and δ13CDIC is significantly higher than δ13CDIC-rock in the brief rain period. The difference between δ13CDIC and δ13CDIC-rock is caused by the influence of aquatic photosynthetic organisms.

您是第51731642位访客
主办单位:中国科学院生态环境研究中心 单位地址:北京市海淀区双清路18号
电话:010-62941102 邮编:100085 E-mail: hjkx@rcees.ac.cn
本系统由北京勤云科技发展有限公司设计  京ICP备05002858号-2