| 岩溶水柜集流坡面的径流模式和调控建议 |
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| 引用本文： | 姜光辉,郭芳.岩溶水柜集流坡面的径流模式和调控建议[J].水科学进展,2021,32(2):271-278. |
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| 作者姓名： | 姜光辉 郭芳 |
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| 作者单位： | 中国地质科学院岩溶地质研究所自然资源部/广西岩溶动力学重点实验室, 广西 桂林 541004 |
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| 基金项目： | 国家自然科学基金资助项目（41772269）；广西重点研发计划资助项目（桂科AB18221093） |
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| 摘 要： | 作为南方岩溶地区水柜水源的坡面径流，其形成和动态变化缺少精确且详细的解析。选择桂林丫吉试验场峰丛洼地的一个表层岩溶泉为对象，通过1个水文年多指标的监测，获得不同降雨条件下坡面径流的水文和水化学动态过程，以水文分析和水化学示踪解析径流水文特征、产流条件和水源组成。结果表明:坡面径流的水文过程季节性变化对比强烈，低水位总时长占全年的一半，连续时长超过3个月，全年连续断流有40多天，显示坡面径流水源不稳定，具有调控的必要性；受控于溶蚀作用的水化学动态展示了来自于多种界面的径流汇合过程；电导率等指标的波动共同指向降雨事件中形成于裸岩区的石面流发挥先锋作用。依据集流场的下垫面结构从3个方向提出调控建议:减少裸岩区径流渗漏；改善表层岩溶带通透性；揭露覆盖区隐伏径流。这些措施将有助于增加水柜蓄水量，提高径流利用效率。
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| 关 键 词： | 集流场 峰丛洼地 水柜 产流 表层岩溶带 |
| 收稿时间： | 2020-03-16 |
Runoff pattern and adjusting measure of the karst slope for tanks |
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| JIANG Guanghui,GUO Fang.Runoff pattern and adjusting measure of the karst slope for tanks[J].Advances in Water Science,2021,32(2):271-278. |
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| Authors: | JIANG Guanghui GUO Fang |
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| Institution: | MNR&GZAR Key Laboratory of Karst Dynamics, Institute of Karst Geology, CAGS, Guilin 541004, China |
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| Abstract: | The formation and dynamics of slope runoff as karst aquifer recharge process are rarely described specially for the karst area of South China. A spring which discharge epikarst in Yaji experimental site was selected as the research point. The hydrological and hydrochemical dynamic process under different precipitation conditions were obtained through multi-parameter monitoring for a hydrological year. Understanding the dynamic characteristics of runoff formation conditions as well as water source composition of slope flow were formed using hydrological and hydrochemical analyzes. According research there are strong seasonal changes which reflected on the hydrological processes for slope runoff. The total duration of low water level is half of the year,the continuous duration is more than 3 months,and more than 40 days are continuous dry-up throughout one hydrological period. All this indicates instability and variability in slope runoff,and it is necessary to apply certain measures in regulating this process. The hydrochemical dynamics controlled by carbonate dissolution show the merging of runoff from different geological formation. The oscillation of electrical conductivity as well as other indicators show that the runoff formed in bare rock surface plays vary important role. According to the geological structure of slope area regulation through three approaches is proposed:reducing runoff leakage in bare rock area;improving permeability of the epikarst zone;exploring karst conduits in dolines. These measures will help to increase the storage capacity of water tank and improve the utilization efficiency of runoff. |
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| Keywords: | runoff collecting peak cluster water tank runoff generation epikarst zone |
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