岩溶地下河管道流和管道结构及参数的定量示踪——以桂林寨底地下河为例  

Quantitative tracing study of hydraulic and geometric parameters of a karst underground river:exemplified by the Zhaidi underground river in Guilin

作　　者：陈余道[1] 程亚平[1] 王恒[1] 蒋亚萍[1] 黄月群[1] 

机构地区：[1]桂林理工大学广西矿冶与环境科学实验中心,广西桂林541004

出　　处：《水文地质工程地质》2013年第5期11-15,共5页Hydrogeology & Engineering Geology

基　　金：国家自然科学基金(41172229);国家科技支撑项目(2012BAC16B02)

摘　　要：定量示踪研究是岩溶地下河管道流和管道结构参数估测的有用技术,可以为概化水文地质条件和数学模型研究提供科学依据。以桂林寨底地下河示踪试验为例,利用荧光素钠和罗丹明B为示踪剂,通过高精度、高密度和多指标的自动检测技术,不仅合理估算了管道流平均滞留时间、平均运移速度、弥散系数、管道过水体积、管道过水断面面积及其等效直径,而且表明常用示踪剂荧光素钠和罗丹明B在应用中存在的吸附性差异,认为荧光素钠吸附性弱,数据可信性强,而罗丹明B吸附性强,在数据解释中需要谨慎。Quantitative tracing studies are the most reliable diagnostic techniques for estimating basic hydraulic and geometric parameters of karst conduits for hydrogeological generalization and numerical model.As an example' a tracer test was performed in the Zhaidi underground river in Guilin of China' in which uranine and rhodamine B were used as co-tracers and were monitored via the automatic detection technology with high precision' high density and multiple indicators.Based on breakthrough curves(BTCs),some parameters including mean residence time' average transfer velocity' dispersion coefficient' conduit volume' conduit surface area and flow cross-sectional area were determined.Moreover' the difference in adsorption between uranine and rhodamine B exist.The BTC of uranine can provide more reliable results owing to little adsorption.However' rhodamine B with strong adsorption need cautions when data are interpreted.

关 键 词：岩溶地下河 定量示踪研究 管道流 管道结构 参数估测 

分 类 号：P641[天文地球—地质矿产勘探]