Modelling Groundwater Flow And Pollutant
Transport In Hard-rock Fractures
Author(s)
J. Mls
Abstract
There are several reasons for the fact that fracture flow has been a subject of
active research for the last three decades. Rock fractures commonly exist in the
Earth’s upper crust and, therefore, significantly control groundwater movement.
Fracture-dominated flow has become increasingly important in various problems
of geotechnical interest. A particularly important reason for investigating fracture
flow and contaminant transport is the necessity of building repositories of nuclearfuel
waste which are often situated deep in granite massifs. The possibility of
their damage during the long periods of storage requires the study of problems
connected with the risk of possible contaminant displacement.
The aim of this article is to model water flow and contaminant transport in hardrock
fractures. Such results are required that make it possible to determine the
hydraulic parameters of real fractures by comparison with data measurable under
field conditions.
Making use of the known hydromechanical characteristics of the modelled
fracture and the aqueous phase, a problem with a set of three partial differential
equations and related boundary conditionswas formulated and numerically solved.
The unknown functions of the problem are the liquid-phase pressure, the flow
velocity and the contaminant concentration. The method of solution is described
and the achieved results are visualized and presented.
1 Introduction
The safety of deep repositories of spent nuclear fuel is a matter of great relevance
and importance. In the course of long duration storage, radionuclides can leach out
of their containers and spread into the surrounding host-rock materials. Prediction
of the rate of contaminants migration will depend on the hydraulic characteristics
Keywords
Related Book
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