基于在线高分辨率示踪试验的岩溶地下河管道特征分析-西南大学.doc

基于在线高分辨率示踪试验的岩溶地下河管道特征分析( ——以彭水县为例 泽英，丙清，黄山松，平恒,3*，张宇3，陈雪彬.重庆市地质勘查开发局南江水文地质工程地质队，重庆 401121 2.国土资源部/广西岩溶动力学重点实验室(中国地质科学院岩溶地质研究所)，桂林 541004 3.西南大学地理科学学院400715 摘要定量计算方法82.2%，证明×106 m3。在线高分辨率示踪技术由于其精度高、自动化程度高以及成本较低等特点，可在岩溶水文地质调查中得以推广应用。 关键词：在线高分辨率；示踪试验；地下河；岩溶管道；彭水县 Determination of the conduit structure in a karst subterranean river based on the technique of online and high-resolution tracing test, a case study in Pengshui County, Chongqing Liu Shulin1, Fan Zeying1, Lu Bingqing1, Huang Shansong1, Yang Pingheng2,3, Zhang Yu3, Chen Xuebin3 1.Nanjiang?Hydrogeological??Engineering?Geology?Brigade,?ChongQing?Bureau?of?Geology?and?Minerals?Exploration,?Chongqing 401121, China 2. The Karst Dynamics Laboratory, Ministry of Land and Resources, Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin 541004, China 3. School of Geographical Sciences, Southwest University, Chongqing 400715, China Abstract: It’s difficult to research the conduit structure in subterranean river in South China due to the heterogeneity of karst. The conduit section of the subterranean river from Yanwotuo to Zhichang Spring in Pengshui County, Chongqing was taken as a case to study. A technique of online and high-resolution tracing test was employed with the tracer of uranine. The breakthrough curve (BTC) of the uranine in the karst groundwater was obtained to quantitatively investigate the geometrical characteristics of the conduit structure and the flow field. Results show that as much as 82.2% of the recovery mass rate of the injected uranine proved that the Zhichang Spring was the main discharging outlet of the karst watershed basin. The BTC of the uranine presents as a shape of double peaks, indicating that two karst conduits in?parallel exist in the study area. Based on the quantitative calculation of BTC of the uranine, the mean diameter of the conduits and the water volume in the karst aquifer were 17 meters and 4.5×106 m?0 respectively. With the characteristic of high precisio