| 基于系统空间特征识别的岩溶地下水污染成因分析 |
| |
| 引用本文： | 宁航,王宗星,柳富田,蒋万军,常威,张竞,万军伟.基于系统空间特征识别的岩溶地下水污染成因分析[J].地质科技通报,2022,41(5):367-376. |
| |
| 作者姓名： | 宁航 王宗星 柳富田 蒋万军 常威 张竞 万军伟 |
| |
| 作者单位： | 1a.中国地质调查局天津地质调查中心, 天津 300170 |
| |
| 基金项目： | 中国地质调查局项目DD20221759 |
| |
| 摘 要： | 岩溶地下水系统空间结构复杂, 含水层渗透性强、防污性能差, 一旦发生污染, 污染物扩散迅速且修复难度较大。以南方某岩溶大泉为例, 在水文地质调查的基础上, 结合水化学图解及多元示踪技术, 分析岩溶地下水系统边界及暗河管道分布, 识别岩溶泉的主要污染物、来源及污染途径, 探索岩溶地下水污染成因模式。研究结果表明, Q1岩溶地下水系统为典型的"多源单汇"地下水循环模式, 存在南北2条主要径流通道; 其主要污染物质为锰、菌落总数、氨氮、总磷, 分别为地下水质量标准阈值的17, 14, 7.2, 3.8倍; 建筑垃圾堵塞原有的暗河通道, 工程勘察和强夯活动破坏了垃圾堆场下部天然黏土防渗层, 生活垃圾及渗滤液进入岩溶管道, 两者共同导致了岩溶地下水的污染。该研究对于岩溶地下水系统污染防治工作具有重要的借鉴意义。
|
| 关 键 词： | 地下水污染 示踪试验 空间结构 成因分析 岩溶水系统 |
| 收稿时间： | 2022-07-06 |
Genesis of karst groundwater contamination based on system spatial feature recognition |
| |
| Institution: | 1a.Tianjin Center, China Geological Survey, Tianjin 300170, China1b.North China Center of Geoscience Innovation, China Geological Survey, Tianjin 300170, China2.Power China Zhongnan Engineering Corporation Limited, Changsha 4100143.Changjiang Geotechnical Engineering Co. Ltd., Wuhan 430010, China4.School of Environmental Studies, China University of Geosciences(Wuhan), Wuhan 430078, China |
| |
| Abstract: | The karst groundwater system has a complex spatial structure, strong aquifer permeability and poor anti-pollution performance. Once pollution occurs, the pollutants spread rapidly, and the repair is difficult. This study takes the pollution of a large karst spring in South China as an example. On the basis of a karst hydrogeological survey, combined with hydrochemical characteristics and multiple-tracer technology, the boundary of karst groundwater system and the distribution of underground river pipelines were analyzed, and the main pollution sources and pollution routes of the karst spring were identified. In addition, the genetic model of karst groundwater pollution was also explored. These results showe that the Q1 karst groundwater system was a typical "multi-source, single-sink" groundwater circulation pattern with two main runoff channels in the north and south. Manganese, total bacterial counts, ammonia nitrogen and total phosphorus were the main substances exceeding the standard, which were 17, 14, 7.2 and 3.8 times the groundwater quality standard threshold, respectively. The construction waste blocked the original channel of the underground river, forcing the groundwater to divert and flow under the landfill. Engineering investigation and dynamic compaction activities destroyed the natural clay impermeable stratum under the landfill, resulting in the early transport of domestic garbage and leachate entered into the karst pipeline, both of which caused the pollution of karst groundwater. This study provides an important reference for the prevention and control of karst groundwater pollution. |
| |
| Keywords: | |
|
| 点击此处可从《地质科技通报》浏览原始摘要信息 |
| 点击此处可从《地质科技通报》下载免费的PDF全文 |
|
