Vertical anisotropy of hydraulic conductivity in fissured layer of hard-rock aquifers due to the geological structure of weathering profiles.

被引：25

作者：

Maréchal, JC

Wyns, R

Lachassagne, P

Subrahmanyam, K

Touchard, F

机构：

[1] BRGM, NGRI,Serv EAU, Unite Ressources Eau Millieux Discontinus, Ctr Francoindien Rech Eaux Souterraines, Hyderabad 500007, Andhra Pradesh, India

[2] Bur Rech Geol & Minieres, Serv Cartog, Unite Modelisat & Applicat, F-45060 Orleans, France

[3] Bur Rech Geol & Minieres, Serv EAU, Unite Ressources Eau Mileux Discontinus, F-34000 Montpellier, France

[4] Ctr Francoindien Rech Eaux Souterraines, Natl Geophys Res Inst, Hyderabad 500007, Andhra Pradesh, India

来源：

COMPTES RENDUS GEOSCIENCE | 2003年 / 335卷 / 05期

关键词：

weathering; hard rock; horizontal fracture; India; anisotropy; pumping test; granite;

D O I：

10.1016/S1631-0713(03)00082-8

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Pumping tests carried out in the fissured layer of a granitic hard-rock aquifer, interpreted at the observation wells by means of the analytical solution of Neuman and at the pumping wells with that of Gringarten show the existence of a strong vertical anisotropy of this layer of the aquifer; the horizontal permeability is clearly and systematically higher than the vertical one. These results agree perfectly with the geological observations, the fissured layer of the weathered granite profile showing the existence of many sub-horizontal fissures. It confirms that, within the fissured layer, the permeability of sub-horizontal fissures due to the weathering process dominates over that of sub-vertical fissures of tectonic origin. (C) 2003 Academie des sciences. Publie par Editions scientifiques et medicales Elsevier SAS. Tous droits reserves.

引用

页码：451 / 460

页数：10

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