Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/S0022-1694(02)00176-2 |
Matrix diffusion in northern Negev fractured chalk and its correlation to porosity | |
Polak, A; Nativ, R; Wallach, R | |
通讯作者 | Wallach, R |
来源期刊 | JOURNAL OF HYDROLOGY
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ISSN | 0022-1694 |
出版年 | 2002 |
卷号 | 268期号:1-4页码:203-213 |
英文摘要 | In this paper we report on vertical variations in the values of the effective diffusion coefficient determined on 19 chalk samples collected throughout most of the Eocene section (285 m) in the northern Negev desert, Israel. The dependence of the measured values on sample depth. porosity, permeability and mineralogy was also evaluated, Finally, a correlation between the measured effective diffusion coefficient and porosity is suggested for these samples. The calculated values of the diffusion coefficient ranged from 1.22 to 2.55 X 10(-6) cm(2)/s. These values are significantly higher than those measured on consolidated rock samples, and similar to values reported for British Cretaceous chalk. Our results demonstrate that the effective diffusion coefficient values for the Eocene chalk in the northern Negev desert, Israel are exclusively dependent on the porosity of the chalk matrix by D-e = D(0)epsilon(2) (m = 2 in Archie’s law) and not on its mineralogy or permeability. The fitted exponent, in, falls between the two extreme values of 1.5 and 2.5 that were mentioned by [Diffusion in Natural Porous Media (1998)] for porous media. However, a linear relationship between the effective diffusion coefficient and porosity fits better the data within the range of the measured of porosities, These correlations provide an easier and less costly method of estimating the diffusion coefficient in chalk samples from the Eocene Group in the nor-them Negev desert, Israel. (C) 2002 Elsevier Science B.V. All rights reserved. |
英文关键词 | matrix diffusion chalk Israel contaminant transport porosity diffusion |
类型 | Article |
语种 | 英语 |
国家 | Israel |
收录类别 | SCI-E |
WOS记录号 | WOS:000179209900014 |
WOS关键词 | POROUS-MEDIA ; GRANITE ; MIGRATION ; TRANSPORT ; SEDIMENTS ; RATES ; WATER ; ROCK |
WOS类目 | Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources |
WOS研究方向 | Engineering ; Geology ; Water Resources |
来源机构 | Hebrew University of Jerusalem |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/143173 |
作者单位 | (1)Hebrew Univ Jerusalem, IL-76100 Rehovot, Israel |
推荐引用方式 GB/T 7714 | Polak, A,Nativ, R,Wallach, R. Matrix diffusion in northern Negev fractured chalk and its correlation to porosity[J]. Hebrew University of Jerusalem,2002,268(1-4):203-213. |
APA | Polak, A,Nativ, R,&Wallach, R.(2002).Matrix diffusion in northern Negev fractured chalk and its correlation to porosity.JOURNAL OF HYDROLOGY,268(1-4),203-213. |
MLA | Polak, A,et al."Matrix diffusion in northern Negev fractured chalk and its correlation to porosity".JOURNAL OF HYDROLOGY 268.1-4(2002):203-213. |
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