长江江苏段河床沉积物渗透系数试验研究  

Experimental Study on Permeability Coefficient of Streambed Sediment of Yangtze River in Jiangsu Province

作　　者：程春龙[1] 束龙仓[1] 王茂枚 张春艳[1] 唐然[1] 

机构地区：[1]河海大学水文水资源与水利工程科学国家重点实验室,江苏南京210098 [2]江苏省水利科学研究院,江苏南京210017

出　　处：《水电能源科学》2011年第11期64-66,211,共4页Water Resources and Power

摘　　要：针对由特征粒径推求渗透系数的经验公式均具有局限性的问题,以长江江苏段河床沉积物为例,对其进行颗粒分析,得到沉积物的粒组成分及有关特征粒径,采用Darcy渗透试验测定沉积物的渗透系数为0.2～5.0m/d,并对河床沉积物的渗透系数与特征粒径进行回归分析。结果表明,渗透系数与特征粒径d10之间存在显著的二次函数关系,所建立的回归公式能较好地应用于长江江苏段河道。Each empirical formula of determining permeability coefficient （K） from grain size distribution has limita- tion. Taking streambed sediment of the Yangtze River in Jiangsu Province for an example, the components of different particle size and related characteristic grain diameters are obtained with grain analysis. Then the K of the sediment is measured by using Darcy permeability test, which is ranged from 0.2 to 5.0 m/d. Finally, the relationships between K and characteristic grain diameters are established through regression analysis. The results show that the relationship between K and characteristic grain diameters d10 is obvious quadratic function, and the regression formula can be applied to the Yangtze River in Jiangsu Province.

关 键 词：河床沉积物 渗透系数 特征粒径 回归分析 长江江苏段 

分 类 号：P641.2[天文地球—地质矿产勘探]