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两种常用染色剂管道及淤泥条件下示踪及对比——以丁旗地下河连通试验为例
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引用本文:易连兴,赵良杰,卢海平,王 喆.两种常用染色剂管道及淤泥条件下示踪及对比——以丁旗地下河连通试验为例[J].中国岩溶,2017,36(5):721-726. YI Lianxing,ZHAO Liangjie,LU Haiping,WANG Zhe.Comparative tracing of two common dyes in conduits with silt: A case study of the Dingqi underground river[J].Carsologica Sinica,2017,36(5):721-726.
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易连兴 中国地质科学院岩溶地质研究所/国土资源部、广西岩溶动力学重点实验室 
赵良杰 中国地质科学院岩溶地质研究所/国土资源部、广西岩溶动力学重点实验室 
卢海平 中国地质科学院岩溶地质研究所/国土资源部、广西岩溶动力学重点实验室 
王 喆 中国地质科学院岩溶地质研究所/国土资源部、广西岩溶动力学重点实验室 
基金项目:中国地质调查局地质调查项目“贵州打邦河流域1∶5万水文地质环境地质调查”(DD20160300-02)
中文摘要:通过对丁旗地下河同一投放点同时开展二元示踪试验,探讨了当前被忽略的不同示踪剂应用对比及回收率合理性等问题。在淤泥沉积的地下河管道及流量和浊度稳定条件下,得出主要结论:(1)荧光素钠、罗丹明B回收率分别为53.91%和40.72%,前者比后者少损失13.19%;其中荧光素钠在主峰和缓慢衰减段排出量分别占85.03%和14.97%,罗丹明B则对应为65.88%、34.12%;(2) 荧光素钠对应峰值的回收强度为罗丹明B的2.95倍且最大峰值出现时间比后者提前2 h;(3) 罗丹明B由于吸附等形成的浓度曲线对管道结构分析有可能产生误导,荧光素钠则相对更准确。
中文关键词:岩溶地下河  示踪  染色示踪剂对比  回收率
 
Comparative tracing of two common dyes in conduits with silt: A case study of the Dingqi underground river
Abstract:The study area is located in the upstream Dabang river, a branch of the Beipanjiang river in Dingqi town, Zhenning county, Guizhou Province. The strata of this place comprise lower Triassic limestone, dolomite and landform, with landforms of dissolution hills and valleys. It hosts underground rivers A19, A30 and A10, with silt deposits and buried depths less than 30 m. This study focused on the comparison of tracer experiments for two materials of Uranine and Rhodamine B, and discussion on the rationality of the recovery rates by the two methods. The results show that,(1) The recovery rate of Uranine is 53.91%, which is higher than Rhodamine B of 40.72%;(2) Uranine’s recovery intensity for maximum concentration is 2.95 times than that of Rhodamine B; (3) It is relatively easy to notice some complete wave crests in the attenuation section of the Rhodamine B concentration curve. It is concluded that,(1) in the underground rivers with silt deposition, Uranine and Rhodamine B have higher adsorption rates, and there may be some problems in the tracer test technology with higher recovery rates; (2) For the analysis of conduit structure or hydrogeological conditions, Uranine is superior to Rhodamine B; (3) The accuracy of recovery rates depends on fluorimeter calibration, flow monitoring, and closely related to environmental factors, such as water-turbidity and sediments.
keywords:karst underground river, tracing, comparison of dyeing tracer, recovery rate
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