CAJ | 학술논문

裂隙岩体的非均质性使得其渗流问题与传统多孔介质渗流存在本质差别。目前流行的裂隙渗流模型包括：离散裂隙网格模型；双重连续介质模型；等效连续介质模型。介绍上述方法优劣，并以中国东部某岛屿为基础，基于等效连续介质法，建立三维渗流模型以及污染物迁移模型。数值模拟结果显示，污染物被岩体的吸附程度对污染物运移影响巨大；降水入渗量增多会使得水流速度增快，却不会显著提升污染物运移至边界的时间，反而由于其增大了污染物向四周扩散的趋势，致使较少污染物迁移至边界；距断层较近的污染源不仅会导致污染物迅速迁移至边界甚至地表，并且质量分数显著提升。
렬극암체적비균질성사득기삼류문제여전통다공개질삼류존재본질차별。목전류행적렬극삼류모형포괄：리산렬극망격모형；쌍중련속개질모형；등효련속개질모형。개소상술방법우렬，병이중국동부모도서위기출，기우등효련속개질법，건립삼유삼류모형이급오염물천이모형。수치모의결과현시，오염물피암체적흡부정도대오염물운이영향거대；강수입삼량증다회사득수류속도증쾌，각불회현저제승오염물운이지변계적시간，반이유우기증대료오염물향사주확산적추세，치사교소오염물천이지변계；거단층교근적오염원불부회도치오염물신속천이지변계심지지표，병차질량분수현저제승。
Flow transport in fracture media is different from that in porous media due to anisotropy of fracture rocks.Available methods for treatment of fracture media include discrete fracture and matrix model, dual-continua method,and effective continuum method.Advantages and disadvantages of these methods are presented,and modeling studies for fluid flow and tracer transport in a field site with fractured rock are performed.The site of study is a small island in eastern China.A steady-state flow field with current climate condition is simulated using a simplified conceptual model of the flow system, which submits to mass conservation and Darcy’s Law.Result of the steady-state flow field is then used in further tracer transport simulations.It is found that adsorption is the most significant factor of transport.With higher infiltration,the tracer tends to reach the boundary with lower concentration.Because higher the infiltration,broader the tracer spreads.Accidentally inj ecting tracer near the fracture area may cause serious pollution.Tracer will quickly spread along the fault with boarder plume and higher concentration.In addition,a portion of the tracer will reach the surface.Therefore,it is necessary to pay close attention to water near faults.