西南岩溶地区地下河系统流量衰减系数的时变特征  

Time Varying Characteristics of Flow Attenuation Coefficient in Karst Underground River System at Southwestern China

作　　者：董贵明[1] 束龙仓[2] 田娟[3] 

机构地区：[1]中国矿业大学资源与地球科学学院,江苏徐州221116 [2]河海大学水文水资源与水利工程科学国家重点实验室,江苏南京2100982 [3]江苏师范大学城市与环境学院,江苏徐州221116

出　　处：《水电能源科学》2014年第6期33-36,共4页Water Resources and Power

基　　金：国家重点基础研究发展计划(973计划)(2006CB403204);国家自然科学基金项目(41202179;51209109);江苏省高校优势学科建设工程项目;中国矿业大学青年科研基金项目(2009A031);中国矿业大学人才引进项目;江苏师范大学人才引进项目

摘　　要：鉴于衰减系数是流量衰减分析过程中的关键参数,在给出瞬时衰减系数、名义衰减系数定义的基础上,研究了两种衰减系数的时变特征,据此分析了后寨地下河系统实测流量(冒水坑站和老黑潭站)数据。结果表明,在全部衰减时间内,瞬时衰减系数整体上随时间增加而变小,在每一个衰减段内其数值也是整体变小的;瞬时衰减系数的第一衰减段变幅大于第二衰减段,第二衰减段大于第三衰减段;第一衰减段变化速度大于第二衰减段,第二衰减段大于第三衰减段;名义衰减系数与瞬时衰减系数具有类似的时变特征。Attenuation coefficient is the key parameter in flow attenuation analysis. On the basis of instantaneous attenuation coefficient and normal attenuation coefficient, this paper studies time varying characteristics of two attenuation coefficients. Thereby, observed flow data of Houzhai underground river （Maoshuikeng station and Laoheitan station） are analyzed. The results show that in the overall attenuation period, instantaneous attenuation coefficient generally decreases with increasing time, and the value generally decreases in each attenuation stage on the whole; instantaneous attenuation coefficient of the first attenuation stage is greater than that of the second attenuation stage, and that of the second attenuation stage is greater than that of the third attenuation stage; the speed of variation in the first attenuation stage is greater than that of the second attenuation stage, and that of the second attenuation stage is greater than that of the third attenuation stage; time varying characteristics of normal attenuation coefficient is similar to that of instantaneous attenuation co efficient.

关 键 词：岩溶 地下河系统 衰减系数 衰减分析 时变特征 

分 类 号：P641.7[天文地球—地质矿产勘探]