天然输水河道潜水层土体渗透系数随机分布特性  

Study on Random Distribution Characteristics of Soil Permeability Coefficients in Phreatic Layer of Natural Water Conveyance Channel

作　　者：兰雁[1,2] 王辉 赵寿刚[1,2] 张一博 孙瑞东 范嘉懿 LAN Yan;WANG Hui;ZHAO Shougang;ZHANG Yibo;SUN Ruidong;FAN Jiayi(Yellow River Institute of Hydraulic Research,YRCC,Zhengzhou 450003,China;Engineering Technology Research Center of Dike Safety and Disease Control,Ministry of Water Resources,Zhengzhou 450003,China;Henan River Diversion and Huaihe River Engineering Co.,Ltd.,Shangqiu 476200,China)

机构地区：[1]黄河水利委员会黄河水利科学研究院,河南郑州450003 [2]水利部堤防安全与病害防治工程技术研究中心,河南郑州450003 [3]河南省引江济淮工程有限公司,河南商丘476200

出　　处：《人民黄河》2025年第2期150-155,共6页Yellow River

基　　金：引江济淮工程(河南段)工程科研服务项目(HNYJJH/JS/FWKY-2021001);水利部堤防安全与病害防治工程技术研究中心开放课题(NQ-ZX-2023-0418);黄河水利科学研究院科技发展基金资助项目(黄科发202406)。

摘　　要：清水河天然河道两侧潜水层结构属冲洪积地层,具有明显的沉积韵律,河道及调蓄水库存在不同程度渗漏,直接影响输水流量和地下水补给量。引入随机理论探究河道典型潜水层土层渗透系数的分布规律,并利用渗透系数密度分布函数得到土层组合渗透系数,对比分析了不同渗透系数组合下河道渗流量的变化,结果表明:输水河道潜水层土体黏粒含量与渗透系数相关性显著;粉质黏土、重粉质壤土渗透系数呈指数分布,壤土、砂壤土渗透系数呈t分布;基于各土层渗透系数分布函数,选取3种渗透系数组合计算的河道单侧年渗流量变幅较大,土层渗透系数随机性对渗流量影响十分显著。The phreatic layer structure on both sides of the natural channel of the Qingshui River belongs to the floodplain stratum,with obvious sedimentary rhythms.There are different degrees of seepage in the river channel and the storage reservoir,which directly affects the water transfer flow and groundwater recharge.The stochastic theory was introduced to investigate the distribution law of the permeability coefficient of typical phreatic soil layers in the river channel,and the density distribution function of the permeability coefficient was used to obtain the combined permeability coefficient of the soil layers,and the change of seepage in the river channel under the different combinations of permeability coefficients was comparatively analyzed.The results indicate that the correlation between the clay content and permeability coefficient of the phreatic layer soil in the water conveyance channel is significant;the permeability coefficients of the silty clay and heavy silty loam show exponential distribution,and the permeability coefficients of loam and sandy loam show t-shaped distribution;based on the distribution function of the permeability coefficient of each soil layer,the annual seepage rate of single-side channel calculated by the combination of three permeability coefficients is larger,and the random permeability coefficient of soil layer has a significant effect on the seepage rate.

关 键 词：天然输水河道 水量损失 潜水层 渗透系数 随机理论 

分 类 号：TU442[建筑科学—岩土工程]