KIP Theses and Dissertations
Contribution à l'étude hydrodynamique des aquifères karstiques
Files
Download Full Text
Publication Date
5-6-1975
Type
Article
Abstract
The first section of the present work devote to the hydrodynamic study of the karstic aquifers deals with generalities on the karst and on the laws governing water flow commonly in use. It seems indeed necessary to determine the nature of that aquifer so as to bring out its originality and undertake the study of its operation. The water-bearing rock is essentially a carbonate presenting specific chemical and physical properties. Where these have an influence on water circulation processes, they have been stated and analysed. The karstification, a definition of which is given, is related to these properties. Then, relations between the karstification processes and the water circulation have been investigated. The above induces to define the notion of aquifer from a hydrogeological and speleological point of view. The aws of water flow in common use have been established after works on porous media. Therefore, part of the present work is devoted to critical examination of these laws stressing the various assumptioin and approximation methods which have been applied. So it is that Darcy's law is thoroughly examined since it has been found to have very limited application in the karst. Considering the saturated zone, the other points studied are the impulse propagation, the notion of confined flow which is sometimes difficult to define in the karst, the compressibility of the water-bearing rock in connection with an analysis of the earth tide frequently met in this type of aquifer, the heterogeneity due to the fractures and the validity of Dupuit's assumptions. In the unsaturated zone, the flow appears in two modes, the first bebing diphasis (air-water), the second being an actual run-off. The problem of capillary barriers is also examined since it seems to bear an important part in the karst.
Language
French, English
Recommended Citation
Mangin, Alain, "Contribution à l'étude hydrodynamique des aquifères karstiques" (1975). KIP Theses and Dissertations. 31.
https://digitalcommons.usf.edu/kip_etd/31
