贵阳市子水泉地下河管道调查与污染成因分析  

Investigation and pollution cause analysis of underground river pipeline in Zishuiquan,Guiyang City

作　　者：熊俊伟 XIONG Jun-wei(Guizhou Institute of Geological Environment Monitoring,Guiyang 550000,China)

机构地区：[1]贵州省地质环境监测院,贵州贵阳550000

出　　处：《地下水》2024年第5期42-45,共4页Ground water

摘　　要：子水泉为岩溶地下水天然出露点,是贵阳市阅山湖重要的地下水补给来源,泉水的水化学质量和地下河管道特征对阅山湖的水质安全和生态环境影响重大。依托“阅山湖地下水污染及水文地质调查”项目,采用示踪试验、地球物理勘探、水质测试等手段,对子水泉的地下河管道发育情况和水化学组分开展了详细调查。通过示踪试验证实了子水泉与上游两个岩溶落水洞的连通性,根据示踪数据反映的地下水流速,结合岩溶形态规模调查,确定东北侧落水洞(K02)所在的地下河为主管道,其地下水最快流速为13.79 m/h,平均流速为7.21 m/h;北侧落水洞(K03)所在的地下河为支管道,其地下水最快流速为5.12 m/h,平均流速为4.65m/h。通过高密度电法物理勘探进一步验证了主管道的延伸方向和附近岩溶发育的强烈性。通过水质测试查明了子水泉有机组分二氯甲烷超标,三氯甲烷、1,2-二氯乙烷、1,2-二氯丙烷检出,落水洞(K02)地下水在汇入汽车4S店污水后二氯甲烷、1,2-二氯乙烷含量大幅升高,三氯甲烷、1,2-二氯丙烷含量显著升高。由此判断子水泉污染是由汽车4S店生产污水漏出后经落水洞(K02)汇入地下河管道中造成。可为岩溶地区地下河管道及地下水有机污染调查提供一定参考借鉴。Zishui spring is a natural dewpoint of karst groundwater and an important source of groundwater recharge in Yueshan Lake,Guiyang City,the water chemical quality of spring and the characteristics of underground river pipeline have a great impact on the water quality and ecological environment of Yueshan Lake.Based on the project“Yueshan Lake Groundwater Pollution and Hydro-geological survey”,the development and hydro-chemical composition of underground river pipeline in Zishui Spring were investigated in detail by means of tracer test,geophysical exploration and water quality test.The connection between the Zishui spring and the two upstream karst sinkholes was confirmed by the tracer test.According to the groundwater flow rate reflected by the tracer data and the karst morphology and scale investigation,the underground river in the northeast sinkhole(K02)was determined to be the main pipeline,with the fastest groundwater flow rate of 13.79m/h and the average flow rate of 7.21 m/h.The underground river where the north sinkhole(K03)is located is a branch pipeline,and the fastest flow rate of the groundwater is 5.12m/h,and the average flow rate is 4.65m/h.The extension direction of the main pipeline and the intensity of karst development nearby are further verified by high-density electrophysical exploration.Through the water quality test,it was found that the organic components dichloromethane exceeded the standard in Zishui spring,and trichloromethane,1,2-dichloroethane and 1,2-dichloropropane were detected.The contents of dichloromethane,1,2-dichloroethane and trichloromethane,1,2-dichloropropane were significantly increased after the groundwater in Luoshui Hole(K02)was imported into the sewage of automobile 4S shop.It can be concluded that the pollution of the Zishui spring is caused by the leakage of production sewage from the automobile 4S shop into the underground river pipeline through the sinkhole(K02).It can provide some reference for investigation of organic pollution of underground river pipeline and

关 键 词：子水泉 地下河管道 示踪试验 污染成因 

分 类 号：P641.5[天文地球—地质矿产勘探] X523[天文地球—地质学]