孔隙-管道型西南岩溶地下河系统参数与流量衰减系数关系的数值试验研究  

Research on relationship between parameters and attenuation coefficients of pore-pipe underground river systems,southwest China

作　　者：田娟[1] 董贵明[2] 束龙仓[3] 

机构地区：[1]江苏师范大学城市与环境学院,徐州221116 [2]中国矿业大学资源与地球科学学院,徐州221116 [3]河海大学水文水资源与水利工程科学国家重点实验室,南京210098

出　　处：《水文地质工程地质》2013年第2期13-18,共6页Hydrogeology & Engineering Geology

基　　金：中国矿业大学青年科研基金资助项目(2009A031);国家"973"计划项目(2006CB403204);中国矿业大学人才引进资助项目;江苏省高校优势学科建设工程资助项目

摘　　要：流量衰减分析是地下河系统研究中常用的方法之一。为深入流量衰减分析研究,在对地下河系统概化的基础上,使用作者编制的地下河系统水流运动数值模拟程序UGRFLOW09分析了孔隙-管道型地下河系统特征与衰减特征之间的关系。结果表明:第一段衰减系数与渗透系数、衰减含水层厚度、模型宽度及面积、管网密度和管道流量系数均成幂函数关系,随着其数值的增加而减小;第一段衰减系数与给水度关系不明显;第二段衰减系数与渗透系数和管网密度成直线关系,随着其数值的增加而增加;第二段衰减系数与给水度、衰减含水层厚度、模型宽度及面积成幂函数关系,随着其数值的增加而减小;管道衰减系数与渗透系数、衰减含水层厚度和管网密度均成幂函数关系,随着其数值的增加而减小,与相应的管道流量系数也为幂函数关系,管道衰减系数与给水度和含水层宽度关系不明显。Attenuation analysis is one of the commonly used methods to study underground rivers.With the instantaneous attenuation coefficient,nominal coefficient,pipe flow coefficient and other related definitions,the relationship between the characteristic of discharge attenuation and that of underground river system was analyzed using numerical method UGRFLOW09 developed by the author.The results show that attenuation coefficient in the first stage decreases with the increase of permeability coefficient,thickness of attenuation aquifer,width and area of the model,density of pipe network and pipe flow coefficient,and a power function relation exists;attenuation coefficient in the second stage increases linearly with network density and decreases with the increase of water supply degree,thickness of attenuation aquifer,width and area of the model and a power function relation exists;pipe flow coefficient increases with the increase of permeability coefficient,thickness of attenuation aquifer and network density and a power function relation exists while it has no obvious relationship with width of the model.

关 键 词：岩溶 地下河系统 衰减分析 衰减系数 数值方法 

分 类 号：P641.134[天文地球—地质矿产勘探]