[1]孙钰霞,李林立,魏世强,等.喀斯特槽谷区表层喀斯特水化学的暴雨动态特征[J].山地学报,2012,(05):513.
　SUN Yuxia,LI Linli,WEI Shiqiang.Stormscale Hydrochemical Variation in Typical Rock Pendant of Chongqing[J].Mountain Research,2012,(05):513.
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喀斯特槽谷区表层喀斯特水化学的暴雨动态特征()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2012年05期
页码:
513
栏目:
山地学报
出版日期:
2012-01-01

文章信息/Info

Title:
Stormscale Hydrochemical Variation in Typical Rock Pendant of Chongqing
作者:
孙钰霞;李林立;魏世强;
1.西南大学地理科学学院，重庆400715；
2.西南大学资源环境学院，重庆400715；
3. 西南大学三峡库区生态环境教育部重点实验室，重庆400715
Author(s):
SUN Yuxia; LI Linli; WEI Shiqiang
1. College of Geographical Sciences，Southwest University，Chongqing 400715,China;
2. College of Resources and Environment，Southwest University，Chongqing 400715，China;
3.Key Laboratory of Ecoenvironments in Three Gorges Reservoir Region (Ministry of Education), School of Geographical, Southwest University, Chongqing 400715,China
关键词:
表层喀斯特泉; 降雨; 碳酸盐岩-水-CO2相互作用; 喀斯特水水化学动态
Keywords:
epikarst spring;  rainfall;  carbonate rockwater-CO2 interaction;  hydrochemical change of karst water
分类号:
P342,P931.4
文献标志码:
A
摘要:
喀斯特水化学是在碳酸盐岩-水-CO2气三相相互作用的开放系统中形成的,水化学变化既反映了喀斯特含水介质特点和喀斯特发育的程度,又反映了喀斯特区水土流失的进程。选择重庆市南川区南平镇兰花沟为代表,以兰花沟喀斯特动力系统观测站为依托,采用多功能自动化观测仪CTDP300,对暴雨条件下表层喀斯特泉的pH、电导率、水温和水位进行了连续自动监测。监测结果表明:1.表层喀斯特带对降雨很敏感,其喀斯特水化学明显受降雨条件的影响。在强降雨开始时,喀斯特水pH升高,水温降低、电导率降低、PCO2降低,方解石饱和指数(SIc)升高,喀斯特泉水化学表现出雨水的"活塞效应"。2.在强降雨中后期,表层喀斯特水pH、电导...
Abstract:
Karst water chemistry was formed in open system of carbonate rockwater-CO2 interaction. Under storm rain, chemical change of karst water could not only reflect the type of aquifer, but also soil and water loss and desertification administering in karst area. So based on the storm rain, the study on karst water chemistry was very important for desertification administering and soil and water use in karst area. The thesis aimed at Lanhuagou spring in the Nanping country, Chongqing to understand the hydrochemical phenomenon that occurs in the water of Epikarstic aquifer. A site`s automatic records(CTDP300) was fixed up which could inspect five indexes such as rainfall, pH, conductivity, water temperature, water level. According to the data from automatic records the study was showed that: 　　1. Epikarst and its Hydrochemical change are highly sensitive to the rainfall. At the beginning, there are increased pH and SIc, deduced watertemperature, conductivity and Sic for the epikarst spring with the rainfall running. Its showed an “piston effect”. It meaned that epikarst water was moved out from karst aquifer under great water pressure because amount water from rain water entered karst aquifer in a short time. It leaded that PCO2 of karst water depressed and its SIc inclined. 2. According to experiment it was approved that there are at least two important processes that dominated the hydrochemical variation. On one hand, it is the dilution of rainwater, and on the other hand, it is the carbonate rock-water-CO2 interaction. At he beginning of rainstorm, physicochemical variation of spring is mainly controlled by dilution effect and it can last for the entire rainfall process. But 3-4 hours later ,hydrodynamic effect and CO2 effect would occupy the dominant positon due to the high fissure rate and permeanbility in epikarst. Whereas, dilution effect only acts on the earliest period of light rain. 　　3. under the rain hydrochemical change of epikarst spring is different in conduit aquifer and fracture aquifer. The carbonate rockwater-CO2 interaction is the dominated process in the fracture aquifer. But in the conduit aquifer the dilution of rainwater is the main process. Based on the theory aquifer of Lanhuagou spring is mainly composed of conduits. 　　4. Transformation of land use type could affect the chemical variety of Epikarst water under rainstorm.

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备注/Memo

备注/Memo:
收稿日期(Received date)：2011-01-09；改回日期(Accepted) : 2012-04-09。
基金项目（Foundation item）：西南大学博士基金(SWU109050); 中央高校基本科研业务费专项资金(XDJK2011B003); 国土资源部喀斯特动力学重点实验室开放基金联合资助。\[Supported by Doctor Item of Southwest University (SWU109050), the Fundamental Research Funds for the Central Universities(XDJK2011B003), the Open Fund of Karst Dynamic Key Laboratory of Ministry of Land and Resources.\]
作者简介（Biography）：孙钰霞（1976-），女，四川省宜宾市人，讲师，博士生，主要从事农业资源利用研究。\[Sun Yuxia (1976-),female, lecturer, Ph D candiadate, researched on utilization of agricultural resources.\] E-mail: sunyx@swu.edu.cn, Tel: 13983468271
更新日期/Last Update: 1900-01-01