基于在线高分辨率监测和定量计算的岩溶地下水示踪试验  

Tracing Test of a Karst Aquifer Based on Online, High-Resolution Monitoring and Quantitative Calculation

作　　者：杨平恒[1,2,3] 袁道先[1,2,3] 蓝家程[1] 陈雪彬[1] 张笑微[1] 

机构地区：[1]西南大学地理科学学院,重庆400715 [2]三峡库区生态环境教育部重点实验室,重庆400715 [3]中国地质科学院岩溶地质研究所国土资源部岩溶动力学重点实验室,广西桂林541004

出　　处：《西南大学学报（自然科学版）》2013年第2期103-108,共6页Journal of Southwest University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(41103068;41072192);2011年度重庆市国土房管局科技计划项目;国土资源部岩溶动力学重点实验室开放基金资助课题(KDL2012-08);中央高校基本科研业务费专项资金资助项目(XDJK2012B005)

摘　　要：为了定量研究重庆青木关岩溶含水介质特征、获取相关水文地质参数,将天来宝作为示踪剂,采用野外自动化在线监测技术,获取高分辨率的示踪剂质量浓度历时变化曲线,输入Qtracer2模型进行定量计算,结果表明:所采用的仪器可靠,自动化程度高,经济便捷.Qtracer2模型可将获取的高分辨率示踪剂质量浓度变化数据进行定量解译.试验段的岩溶含水介质较为发育,存在单一的洞穴—管道介质,地下水流为紊流流态,洞穴—管道平均直径达2.3m,储水量为30 604m3,纵向弥散系数为0.59m2/s,摩擦系数为0.29,雷诺兹数为48 671,舍伍德数为1 867,施密特数为1 140,分子扩散边界层厚度为1.23mm.In order to quantitatively research the karst aquifer and obtain the related hydrogeological inde- xes in Qingmuguan, Chongqing, tinopal CBS-X was employed as the tracer. A field flourometer was used to get a high-resolution break-through curve of the tracer concentration, and the Qtracer2 model was ap- plied for quantitative calculation. The results showed that flourometer is a reliable, highly automatic, and economical instrument, which can dramatically reduce the cost of traditional methods. The high-resolution break-through curve of the tracer concentration, fully reflecting the real conditions in the field, can be quantitatively interpreted by the Qtracer2 model. Karst aquifer in the test site is well-developed cave/con- duit with a turbulent flow. The mean diameter, flow-channel volume, longitudinal dispersivity coefficient, friction factor, Reynolds number, Sherwood number, Schmidt number and molecular diffusion layer thickness of the cave/conduit are 2.3 m, 30 604 m3, 0.59 m2/s, 0.29, 48 671, 1 867, 1 140 and 1.23 mm, respectively

关 键 词：在线高分辨率 定量计算 岩溶地下水 示踪试验 青木关 

分 类 号：P641[天文地球—地质矿产勘探]