首页 > 过刊浏览>2023年第60卷第4期 >969-982. DOI:10.11766/trxb202108290461
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西南喀斯特小流域关键带含水介质分布特征
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基金项目:

国家自然科学基金项目（41930866）和广西自然科学基金创新研究团队项目（2018GXNSFGA281003）共同资助


Investigation on the Aquifer Structure of Small Watershed Critical Zone on Karst Dolomite in Southwest China
Author:
  • ZHANG Jun

    ZHANG Jun

    Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, ChangSha 410125, China;Guangxi Key laboratory of Karst Ecological Processes and Services, Huanjiang Observation and Research Station for Karst Ecosystems, Chinese Academy of Science, Huanjiang, Guangxi 547100, China;University of the Chinese Academy of Sciences, Beijing 100049, China
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  • CHEN Hongsong

    CHEN Hongsong

    Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, ChangSha 410125, China;Guangxi Key laboratory of Karst Ecological Processes and Services, Huanjiang Observation and Research Station for Karst Ecosystems, Chinese Academy of Science, Huanjiang, Guangxi 547100, China
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  • FU Zhiyong

    FU Zhiyong

    Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, ChangSha 410125, China;Guangxi Key laboratory of Karst Ecological Processes and Services, Huanjiang Observation and Research Station for Karst Ecosystems, Chinese Academy of Science, Huanjiang, Guangxi 547100, China
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  • NIE Yunpeng

    NIE Yunpeng

    Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, ChangSha 410125, China;Guangxi Key laboratory of Karst Ecological Processes and Services, Huanjiang Observation and Research Station for Karst Ecosystems, Chinese Academy of Science, Huanjiang, Guangxi 547100, China
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  • LIAN Jinjiao

    LIAN Jinjiao

    Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, ChangSha 410125, China;Guangxi Key laboratory of Karst Ecological Processes and Services, Huanjiang Observation and Research Station for Karst Ecosystems, Chinese Academy of Science, Huanjiang, Guangxi 547100, China
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  • QIN Chang

    QIN Chang

    Guangxi Hydrogeology and Engineering Geology Team, Liuzhou, Guangxi 545006, China
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  • WEN Zhenxing

    WEN Zhenxing

    Guangxi Hydrogeology and Engineering Geology Team, Liuzhou, Guangxi 545006, China
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Fund Project:

Supported by the National Natural Science Foundation of China (No.41930866) and Guangxi Natural Science Foundation (No.2018GXNSFGA281003)

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    摘要:

    地球关键带（Earth`s Critical Zone）含水层结构的评估和量化对水文水循环和水资源管理有重要意义。然而，表征小流域尺度复杂关键带含水层结构仍存在巨大挑战。以桂西北喀斯特白云岩峰丛-洼地小流域（1.20 km2）为研究对象，共设置21条、总长度为12605 m的高密度电法测线，并结合水文地质钻井，解析小流域尺度含水介质的分布特征及其影响因素。结果发现，构造运动和动力变质作用导致小流域发育多条断层带，为岩溶含水介质（包括土壤、表层岩溶带和表层岩溶泉）的空间分布提供了物质和动力基础。断层带集中发育在洼地，具备良好的水动力和溶蚀环境，导致洼地土壤和表层岩溶带厚度高于坡地且与海拔呈显著（P<0.05）负线性相关关系。同时，土壤和表层岩溶带厚度空间耦合度高，呈显著正线性关系（R2=0.63，P<0.01），与坡面侵蚀和汇流以及土壤-表层岩溶带系统特殊的水-CO2-岩石作用有关。岩溶泉出流于洼地或坡脚，其水文特征与土壤-表层岩溶带系统的分布及储水特性有关。该研究可为流域尺度岩溶含水层的表征及未来陆面模型的构建提供数据与技术支撑。

    Abstract:

    The evaluation and quantification of aquifer structure in the Earth Critical Zones (CZ) are of great significance to the hydrological cycle and water resources management. 【Objective】 However, the characterization of complex CZ structures at spatial scales remains a huge challenge. In this paper, research was conducted on a small karst dolomite watershed (1.20 km2) in northwest Guangxi province, China, to quantify the distribution characteristics of aquifer media in CZ and analyze its influencing factors. 【Method】 a total of 21 electrical resistivity tomography survey lines with a total length of 12, 605 meters was set up and combined with hydrological drilling at the watershed scale. 【Result】 The results show that tectonic movement and dynamic metamorphism resulted in the development of multiple fault zones in the small watershed. This provided the material and dynamic basis for the spatial distribution of karst water-bearing media (including soil, surface karst zone, and surface karst spring). The fault zone was concentrated in the depression, which has a good hydrodynamic and dissolution environment. As a result, the soil and epikarst thickness in the depression was higher than that in hillslope, and there was a significant (P < 0.05) negative linear relationship with elevation. Besides, the spatial coupling degree of soil and epikarst thickness was high, showing a significant positive linear relationship (R2 = 0.63, P < 0.01) between soil and epikarst thickness. It was related to slope erosion and confluence, and special water-CO2-rock interaction in the soil-epikarst zone system. Karst aquifer flows out of the depression or down hillslope, and its hydrological characteristics were related to the distribution and water storage features of the soil-epikarst system. 【Conclusion】 This study provides data and technical support for the characterization of the karst aquifer at the catchment scale and construction of the land surface model in future studies.

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张君,陈洪松,付智勇,聂云鹏,连晋姣,覃常,文振兴.西南喀斯特小流域关键带含水介质分布特征[J].土壤学报,2023,60(4):969-982. DOI:10.11766/trxb202108290461 ZHANG Jun, CHEN Hongsong, FU Zhiyong, NIE Yunpeng, LIAN Jinjiao, QIN Chang, WEN Zhenxing. Investigation on the Aquifer Structure of Small Watershed Critical Zone on Karst Dolomite in Southwest China[J]. Acta Pedologica Sinica,2023,60(4):969-982.

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历史
  • 收稿日期:2021-08-29
  • 最后修改日期:2022-02-17
  • 录用日期:2022-04-11
  • 在线发布日期: 2023-04-12
  • 出版日期: 2023-07-28
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