郭芳, 姜光辉, 刘绍华, 汤庆佳. 利用泉水电导率频率分布辨别岩溶含水系统的水源组分[J]. 水科学进展, 2018, 29(2): 245-251. DOI: 10.14042/j.cnki.32.1309.2018.02.012
引用本文: 郭芳, 姜光辉, 刘绍华, 汤庆佳. 利用泉水电导率频率分布辨别岩溶含水系统的水源组分[J]. 水科学进展, 2018, 29(2): 245-251. DOI: 10.14042/j.cnki.32.1309.2018.02.012
GUO Fang, JIANG Guanghui, LIU Shaohua, TANG Qingjia. Identifying source water compositions of karst water systems by quantifying the conductance frequency distribution of springs[J]. Advances in Water Science, 2018, 29(2): 245-251. DOI: 10.14042/j.cnki.32.1309.2018.02.012
Citation: GUO Fang, JIANG Guanghui, LIU Shaohua, TANG Qingjia. Identifying source water compositions of karst water systems by quantifying the conductance frequency distribution of springs[J]. Advances in Water Science, 2018, 29(2): 245-251. DOI: 10.14042/j.cnki.32.1309.2018.02.012

利用泉水电导率频率分布辨别岩溶含水系统的水源组分

Identifying source water compositions of karst water systems by quantifying the conductance frequency distribution of springs

  • 摘要: 岩溶含水系统中水源组分的识别能帮助认识系统的结构,解决岩溶水文及水化学研究的基础问题。以灵水岩溶大泉为例,分解了4个水文年的电导率频率分布隐藏的峰,并对其所代表的水源组分进行分析。发现灵水泉口的水源组分主要有4种:① 含水系统中岩溶裂隙或管道中释放的重力水,占53%~77%;② 源于泉口附近携带污染物质的水源,占3%~7%;③ 强降雨期间通过覆盖层分散入渗的水源,或先前存贮在管道或裂隙中流动性差的水被带出含水层,占13%~42%;④ 地面径流以及直接降落到湖面的雨水,占2%~3%。将灵水的电导率频率分布与峰丛洼地的两个典型岩溶水系统对比,分析了电导率的频率分布所蕴藏的含义。研究结果为西南3 620个岩溶水系统的进一步归类提供了参考。

     

    Abstract: The identification of different sources of water in a karst groundwater system can not only explain the system's structure, but also help interpret the reason for hydrography and hydrochemistry variations. Quantitative interpretation of the frequency distribution of specific electrical conductivity (SEC) in a spring based on time series data has the capability of identifying water sources within the system. Lingshui Spring, which is in a covered karst basin, was used as a case study to collect conductance frequency distribution (CFDs) over four hydrologic years. The hidden peaks of CFDs were identified and analyzed to determine the water component represented by each peak, then proportion of each kind of water source was calculated. Four kinds of water components were found in Lingshui Spring. The first one is water stored in matrix or fissures in the system, which accounts for 53%-77% of the total discharge. The second one is a water source carrying contaminants from the area surrounding the outlet, which accounts for 3%-7%. The third one is diffusion seepage water through the mantled karst layer or water stored in conduits and fissures with poor mobility pushed out of the aquifer during heavy rains, which accounts for 13%-42%. The fourth one is surface runoff around the lake or water falling directly into lake during raining events, which accounts for 2%-3% of the total discharge. Two typical karst water systems in the peak cluster depression area were compared with Lingshui Spring, and the meanings of the CFDs were analyzed, indicating that the results of CFDs quantifying were in accordance with traditional hydrogeological ways. The study result provides reference for further classifying the 3 620 karst water systems in South China. It is suggested that quantitative interpretation of SEC should be applied and popularized in karst groundwater research in order to know the structure of the system easily and quickly.

     

/

返回文章
返回