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描述地下水和地表水之间暂时的相互作用及其对河岸石池的环境影响
Guanghui Jiang1, Fang Guo2, Liqiong Wei2
1College of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China; Key Laboratory of Karst Dynamics, MNR/GZAR, Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin 541004, China.
The Science of the total environment
|August 25, 2023
概括
河流回流到岩泉源导致临时的地下水和地表水 (GW-SW) 相互作用,导致污染物和微生物的长期污染风险,即使在水的清晰度恢复后.
科学领域:
- 环境科学 环境科学
- 水文学的水文学
- 卡斯特地质形态学 卡斯特地质形态学
背景情况:
- 地下水-地表水 (GW-SW) 交换在岩系统中是典型的.
- 从河流回流到泉源的过渡性GW-SW相互作用是不充分研究的.
- 由于其复杂的流通路径,岩水层对水资源管理构成了独特的挑战.
研究的目的:
- 为了描述河流逆流引起的GW-SW相互作用在石泉中的影响.
- 量化河流水入岩系统的持续时间和影响.
- 评估与这些事件相关的持久环境和微生物风险.
主要方法:
- 集成的高分辨率水文,水化学监测和微生物测量.
- 春季供水池条件分为高水位,中水位和低水位时期.
- 分析了水文图,物理化学特征和微生物因素 (例如大肠杆菌).
主要成果:
- 河流的逆流流入量是降雨期间自然春季排放量的4.4倍.
- 河水在游泳池,喷泉和岩管道中分别持续了132小时,94小时和56小时.
- 度在56小时内恢复正常,但大肠杆菌持续更长时间,表明持续的污染.
结论:
- 河流的逆流导致短暂的GW-SW相互作用,造成持续的污染风险 (重金属,有机物质,微生物).
- 没有低温区的岩水层可以长时间保留污染物.
- 低估卡斯特系统中GW-SW相互作用可能会对水资源管理产生负面影响.
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