桂林甑皮岩洞穴遗址地下水示踪及污染来源分析

曾莘茹; 姜光辉; 郭 芳; 汤庆佳; 刘 凡

doi:10.11932/karst20160301

桂林甑皮岩洞穴遗址地下水示踪及污染来源分析

doi: 10.11932/karst20160301

1.
西南大学地理科学学院/中国地质科学院岩溶地质研究所/国土资源部、广西壮族自治区岩溶动力学重点实验室
2.
中国地质科学院岩溶地质研究所/国土资源部、广西壮族自治区岩溶动力学重点实验室

基金项目: 国家文物局行业专项“甑皮岩遗址地下水害防治工程水文地质勘察”(200237122002)

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出版历程
- 发布日期: 2016-06-25

Tracer tests for pollutant sources of the Zengpiyan remainder cave in Guilin, China

1.
School of Geographical Sciences, Southwest University/Institute of Karst Geology， CAGS/Key Laboratory of Karst Dynamics,MLR & GZAR
2.
Institute of Karst Geology， CAGS/Key Laboratory of Karst Dynamics,MLR & GZAR

摘要

摘要: 桂林甑皮岩遗址周围地带地下水中污染物的种类及来源复杂。为了查明地下水系统的结构特征，分析地下水的污染物运移路径和追溯污染源，采用在线高分辨率示踪技术与人工采样相结合的方法。选取荧光素钠和罗丹明B两种示踪剂，在桂林甑皮岩遗址周围进行了三次示踪试验。根据试验结果分析地下水流场，计算地下水平均流速。结果表明地下水流速在1.6~33.91 m/d，平均值为12.92 m/d。流场内岩溶以溶蚀裂隙为主，且裂隙发育呈网络式，存在西北向东南方向的主径流带，但大型岩溶管道存在的可能性小。三次示踪试验结果均显示，投放点所在的污染源区与遗址周围地下水存在水力联系，因此，遗址附近的居民小区、学校、原砖厂等污染源对遗址下部的地下水存在潜在污染，需更大程度地划分遗址的保护范围。特别是甑皮岩景区化粪池密闭情况较差，严重危害遗址环境，必须对化粪池进行防渗处理。
- 地下水 /
- 污染源 /
- 示踪试验 /
- 桂林甑皮岩 /
- 遗址保护
Abstract: The composition and source of groundwater pollutant are complex around Zengpiyan cave, one of the archaeological sites in Guilin City. The purpose of this work is to find out the structure characteristics of groundwater systems and identify migration pathways of the groundwater pollutants and their pollution sources. Combining the artificial sampling and highresolution online tracer technique and using sodium fluorescein and rhodamine B as the tracers, three tracer tests have been carried out around the study site. Based on these test results, the groundwater seepage field was analyzed and the average velocity of the groundwater was calculated. The results show that the flow velocity is about 1.6-33.91 m/d with anan average value of 12.92 m/d. The flow system in the karst area is basically dominated by a dissolution fracture network. There exists a northeastsouthwest trending main runoff zone; and it is unlikely to exist largescale karst channels that control the flow. The three tracer tests all indicate a hydraulic connection between the release points of pollutants and groundwater around the study site. Therefore, the localities such as residential areas, schools and previous brickyard can be identified as the pollutant sources which have a optional to pollute the groundwater in the relic cave. So it is necessary to expand the scope of protection of the relics, especially taking actions to prevent the leakage of the septic containers of the Zengpiyan scenic, which are now poorly closed and seriously harm to the environment of the relic cave.
- groundwater /
- pollutant source /
- tracer tests Zengpiyan in Guilin /
- relics protection /

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