%0 Journal Article
%T Sand Box Study on Fingering Front Morphology for NAPLs Infiltrated in Homogeneous Porous Media<br>4种NAPLs污染物在二维砂箱中的指进锋面形态特征研究
%A YANG Bin
%A LI Hui-ying
%A WU Bin
%A DU Xiao-ming
%A LI Fa-sheng
%A <br>杨宾
%A 李慧颖
%A 伍斌
%A 杜晓明
%A 李发生
%J 环境科学
%D 2013
%I 
%X The infiltration characteristics of toluene, diesel, 1,2-dichloroethane and tetrachlorethylene were studied in four different unsaturated porous media to determine the impact of the properties of media and fluids on the infiltration aided by digital image analysis technique. The results indicated that the whole process of NAPLs migration can be recorded dynamically using the digital image analysis technique. The unstable flow "fingering" occurred in the process of infiltration. Fingering mechanisms such as splitting, coalescing, and shielding were observed in the process of fingering. Front morphology of the infiltration was influenced by the properties of porous media and fluids. The vertical migration rates and the growth rates of area development were positively correlated to the size of medium particle and the density of the NAPLs (except for toluene) in the process of infiltrating. The number of fingers and the wavelength of fingering were also closely correlated with the properties of media and fluid. DNAPLs infiltrated faster compared with LNAPLs, which resulted in larger pollution area within the same infiltration time. It can be concluded that the environmental risk of DNAPLs is significantly greater than the LNAPLs.
%K porous media
%K NAPLs
%K fingering
%K migration
%K image analysis<br>多孔介质
%K 非水相液体
%K 指进
%K 迁移规律
%K 图像分析
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=FA4CA184ED44CF919996C8C5FAF94A89&yid=FF7AA908D58E97FA&vid=339D79302DF62549&iid=E158A972A605785F&sid=05487D1A4AAEBAA6&eid=857646F4875EA11E&journal_id=0250-3301&journal_name=环境科学&referenced_num=0&reference_num=27