Arid
DOI10.1016/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
ISSN0022-1694
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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