典型岩溶地下河系统污染成因及修复治理效果分析  

Analysis of pollution causes and remediation effects of typical karst underground river system

作　　者：易世友[1] 李强[1] 高峰[1] 陈涛[1] 江瑞萍 YI Shiyou;LI Qiang;GAO Feng;CHEN Tao;JIANG Ruiping(No.114 Geological Team,Guizhou Bureau of Geology and Mineral Exploration,Zunyi 563000)

机构地区：[1]贵州省地质矿产勘查开发局114地质大队,贵州遵义563000

出　　处：《四川地质学报》2024年第4期657-663,共7页Acta Geologica Sichuan

基　　金：贵州省地质勘查基金项目“贵州省水文地质志修编”DKJJ2021-01号;贵州省地质矿产勘查开发局地质科研项目“贵州深切河谷开放型岩溶流域地下水找水模式研究”黔地矿科合[2018]23号。

摘　　要：以典型岩溶山区坪桥地下河系统为例,综合分析该系统污染成因及污染模式,对污染通道进行识别,重点研究了污染通道区垂向岩溶发育特征及透水性,提出地下水污染修复治理思路,对工程修复治理效果进行评估。结果表明:坪桥地下河系统污染模式为间歇式降水入渗淋滤污染模式、持续性泉水径流入渗淋滤污染模式和持续性竖井渗流污染模式三种,污染通道位于废渣处置场东部,垂向上岩溶发育程度和透水性以标高800 m为界划分为两带,提出采用“近源截排”治理措施,工程实施后治理效果明显,污染受体坪桥地下河出口污染物浓度降低66%~78%,计算治理工程每年抽出污水量47 244 m^(3),氨氮每年削减量为16 250 kg,锰削减量10 960kg。研究成果对西南岩溶山区地下水污染修复治理具有一定的参考价值。Taking the typical Pingqiao underground river system in karst mountain area as an example,comprehensively analyzes the pollution causes and pollution patterns of the system,and makes an accurate identification of its pollution channels,the characteristics of vertical karst development and water permeability in the polluted passageway area are emphatically studied.The ideas of remediation of groundwater pollution are proposed.The results show that there are three pollution modes in Pingqiao underground river system:intermittent precipitation infiltration,continuous spring runoff infiltration.The pollution channel is located in the east of the waste residue disposal site,and the vertical karst development degree and water permeability are divided into two zones with the elevation of 800 m.After the implementation of the project,the treatment effect is obvious,and the pollutant concentration of the outlet of Pingqiao underground river is reduced by 66%~78%.It is calculated that the annual sewage output of the treatment project is 47 244 m^(3),the annual reduction of ammonia nitrogen is 16 250 kg,and the reduction of manganese is 10 960 kg.The research results have a certain reference value for the remediation of groundwater pollution in karst mountain areas in southwest China.

关 键 词：地下河系统 污染成因 污染通道 近源截排 治理效果 

分 类 号：P642.25[天文地球—工程地质学]