一种现场测定海底沉积物渗透系数的新方法  

A new method for measuring hydraulic conductivity of marine sediment

作　　者：陈实[1] 李海龙[1] 孙萍萍[1] 田野[1] 刘超[1] 

机构地区：[1]中国地质大学环境学院及(教育部)生物地质与环境地质(重点)实验室,湖北武汉430074

出　　处：《地下水》2008年第4期113-116,共4页Ground water

基　　金：国家自然科学基金项目(编号:40672167)

摘　　要：介绍了潮间带地区,海潮引起海水位变动时,一种原位测定海底沉积物渗透系数的新方法。该方法不仅可以测定海底沉积物水平和垂向的渗透系数,还可对海底沉积物中任意倾斜方向的渗透系数给予测定,这一点是传统测定沉积物渗透系数的方法所无法达到的。通过所测数据,我们可以画出表征含水层渗透系数的椭圆,从而确定海底沉积物各相异性的性质,这一结果对于研究地下水流动、河水泄流及海底沉积物中污染物的运移意义十分重大。该方法能有效的用于不同海洋地质情况,并且相比颗粒分析、渗透仪、和抽水试验等其他方法更经济,更实用。This paper presents an in - situ standpipe method for measuring marine sediment hydraulic conductivities in the intertidal zones by incorporating the sea level variation induced by the tides. The method meas- ures not only vertical and horizontal hydraulic conductivity of marine sediment, but also the hydraulic conductivi- ties along oblique directions, which can not be achieved by the other methods. Therefore, the anisotropic fea- tures of the marine sediment can be determined by constructing the hydraulic conductivity ellipses. The results are very important for the study of groundwater flow, stream leakage, and contaminant transport in marine sedi- ment. This method can be used in various marine conditions. Compared with the pump test and the grain -size analysis methods, the in- situ standpipe method is more economical and practical.

关 键 词：竖管试验 海底沉积物 渗透系数 

分 类 号：P641.2[天文地球—地质矿产勘探]