| 桂西北峰丛洼地泉水和溪流在降雨过程中的水化学动态变化特征 |
| |
| 引用本文： | 丁虎,郎赟超,刘文景,刘丛强.桂西北峰丛洼地泉水和溪流在降雨过程中的水化学动态变化特征[J].地球与环境,2011,39(1):48-55. |
| |
| 作者姓名： | 丁虎 郎赟超 刘文景 刘丛强 |
| |
| 作者单位： | 丁虎,刘文景,DING Hu,LIU Wen-jing(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);郎赟超,刘丛强,LANG Yun-chao,LIU Cong-qiang(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： | 中国科学院西部行动计划项目,国家重点基础研究发展计划 |
| |
| 摘 要： | 通过对中国科学院环江喀斯特农业生态系统观测研究站所在区域的泉水和溪流在降雨时的连续采集,发现二者的水化学特征对降雨的响应较快,但变化却不同。降雨时泉水的pH值在降雨时降低,电导率和主要离子浓度升高,SI降低,pCO2升高,而溪流的电导率和主要离子浓度降低,碳酸盐矿物饱和指数(SI)降低,水中二氧化碳分压(pCO2)降低。降雨时泉水和溪流的溶质输移速率明显增加,但没有表现出在连续降雨中因为降雨强度大输移速率就高的现象,从而推断,除了雨水的稀释作用和"土壤CO2效应"外,土壤包气带的"前水"以及土壤中可交换态离子也影响了降雨时峰丛洼地水体中溶质的运移。
|
| 关 键 词： | 喀斯特 峰丛洼地 水化学 降雨 水-岩-气作用 |
Variations in Chemical Composition of Spring and Stream Water during Rain Events in a Karst Peak Cluster-Depression Catchment,Northwest Guangxi,China |
| |
| DING Hu,LANG Yun-chao,LIU Wen-jing,LIU Cong-qiang.Variations in Chemical Composition of Spring and Stream Water during Rain Events in a Karst Peak Cluster-Depression Catchment,Northwest Guangxi,China[J].Earth and Environment,2011,39(1):48-55. |
| |
| Authors: | DING Hu LANG Yun-chao LIU Wen-jing LIU Cong-qiang |
| |
| Institution: | DING Hu1,2,LANG Yun-chao1*,LIU Wen-jing1,LIU Cong-qiang1(1.State Key Laboratory of Environmental Geochemistry,Institute of Geochemistry,CAS,Guiyang 550002,China,2.Graduate University of the Chinese Academy of Sciences,Beijing 100049,China) |
| |
| Abstract: | A study was conducted on variations in chemical composition of surface and spring water in a typical karst peak cluster-depression catchment,Northwest Guangxi,during two rainfall events on Aug.23 and Aug.24,2007.Both spring and surface waters displayed a quick response to the rainfall in terms of water chemistry.During the rainfall events,electronic conductivity(EC) and concentrations of both dominant cations and anions,carbonate saturation index(SI) and carbon dioxide pressure(pCO2) decreased in the surfac... |
| |
| Keywords: | karst Peak Cluster-Depression catchment water chemistry precipitation water-rock-gas interaction |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《地球与环境》浏览原始摘要信息 |
| 点击此处可从《地球与环境》下载免费的PDF全文 |
|
