【作者】 郑克勋；

【导师】 刘建刚；

【作者基本信息】 河海大学 ， 地球探测与信息技术， 2007， 硕士

【摘要】 地下水连通示踪是在地下水系统的某个部位施放能随地下水运动的物源，在预期能到达的部位对其进行接收检测，根据检测结果，综合分析介质场和势场特征，来获取系统天然流场的水动力属性的探测方法。本文总结了连通示踪方法的起源、发展历程和研究现状。推导了多孔介质地下水溶质运移的一般方程，揭示了其水动力弥散的一般机理，讨论了水动力弥散系数和弥散度的影响因素。在此基础上，建立了4类20个代表性连通示踪试验的地质模型，并用Visual MODFLOW模拟了它们的示踪剂运移过程及结果。通过对模拟结果的分析，总结出了连通示踪试验的适用条件，给出了示踪剂使用量、观测频率的建议值，得到地下水连通示踪曲线的一般规律。本文重点研究了氯化钠、碱性荧光红8B、钼酸铵三种代表性示踪剂的性质，适用条件及相应的检测方法：电导率检测法、荧光分析法和催化极谱法。以贵州绥阳循环经济型重化工基地地下水人工化学试剂连通示踪试验为基础研究了多元连通示踪试验方法。局部的近程连通示踪采用氯化钠示踪剂；整个场地的中程连通示踪采用碱性荧光红8B示踪剂；多场地跨地表水分水岭的远程连通示踪采用钼酸铵示踪剂。试验成果显著，查清了基地区的岩溶水文地质状况。更多还原

【Abstract】 Connection Tracing Test(CTT) is a detecting method which is used for obtainingthe water dynamical attribute of the systemic natural flow field. First, It need inputsome substance which can move along with groundwater in one selected point, thenreceives and assays the substance in the expecting arrived points. According to thetesting result, and analyzing the character of media field and potential filedsynthetically, we can get the flow field information. In the paper, the origin,development and research actuality of the CTT are summarized. In addition,groundwater solute transport equation in porous media is educed, commonmechanism of hydrodynamic dispersion is opened out, and effecting factors ofhydrodynamic dispersion coefficient and dispersivity are discussed. Based on aboveresults, the paper has established 20 typical CTT geological models which can dividedinto 4 kinds and has simulated the transport process and results of tracer for eachmodel with Visual MODFLOW. After analyzing the result, the application conditionsof CTT are gotten, and the tracer dosage and observation frequency are given, then,the common rules of groundwater connection tracing curve are summarized. In thispaper, the study for the property and application conditions of three typical tracerssuch as Sodium Chloride, Basic Fluorescent Red 8B and Ammonium MolybdtaeTetrahydrate is another emphasis. Their relevant assay methods are: electricalconductivity assay method, fluorescence analysis method and catalytic polarographicmethod. Taking the CTT in groundwater with artificial chemical reagent oncontinuable economic heavy chemical industry base in SuiYang of Guizhou as anexample, multi-element CTT method was studied. In these tests, different tracers hadbeen adopted on different conditions. In short range, NaCl was selected; onintermediate range, Basic Fluorescent Red 8B was chosen; for long-distance rangetest with multi-field and across watershed of surface water, Ammonium MolybdtaeTetrahydrate was used. The test result was quite remarkable one, from which the karsthydrogeological status of the base district was found out.更多还原