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Contaminant migration in rock aquifers

Technical Report:

Abstract

This work deals with fractured rock as a host for deposits of hazardous waste. A literature review of modelling approaches and methods for field investigations concerning flow and migration in fractured rock is given. The literature study on field observations shows that the water flow in fractured rock is unevenly distributed, which contradicts the porous medium approach. Some idealized examples are given to investigate where to find low hydraulic gradients. The ability of a laminar pipe-flow model to reproduce the hydrodynamic transport of contaminated groundwater in fractured rock is investigated. It is assumed that the cross-section areas in an ensemble of tubes have a gamma distribution. The model is applied to field tracer experiments at two sites. An attempt is made to model a fracture with irregular aperture as a two-dimensional stochastic process with known correlation structure. It is assumed that the fracture aperture is lognormally distributed, and that the flow is laminar. A particle following algorithm is applied. A comparison with the porous medium approach, and with the laminar pipe flow model is made. 135 refs, 41 figs, 4 tabs.
Authors:
Publication Date:
Oct 28, 1994
Product Type:
Technical Report
Report Number:
LUTVDG-TVVR-1011
Reference Number:
SCA: 052002; 540230; PA: AIX-26:011937; EDB-95:027665; SN: 95001324504
Resource Relation:
Other Information: PBD: 28 Oct 1994
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 54 ENVIRONMENTAL SCIENCES; GEOLOGIC FRACTURES; HYDRAULIC CONDUCTIVITY; RADIONUCLIDE MIGRATION; CONTAMINATION; GROUND WATER; MIGRATION LENGTH; RADIOACTIVE WASTE DISPOSAL; UNDERGROUND DISPOSAL; 052002; 540230; WASTE DISPOSAL AND STORAGE; RADIOACTIVE MATERIALS MONITORING AND TRANSPORT
OSTI ID:
10112221
Research Organizations:
Lund Univ. (Sweden). Dept. of Water Resources Engineering
Country of Origin:
Sweden
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 0282-1990; Other: ON: DE95613249; TRN: SE9400204011937
Availability:
OSTI; NTIS; INIS
Submitting Site:
SWDN
Size:
183 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Dahlbom, P. Contaminant migration in rock aquifers. Sweden: N. p., 1994. Web.
Dahlbom, P. Contaminant migration in rock aquifers. Sweden.
Dahlbom, P. 1994. "Contaminant migration in rock aquifers." Sweden.
@misc{etde_10112221,
title = {Contaminant migration in rock aquifers}
author = {Dahlbom, P}
abstractNote = {This work deals with fractured rock as a host for deposits of hazardous waste. A literature review of modelling approaches and methods for field investigations concerning flow and migration in fractured rock is given. The literature study on field observations shows that the water flow in fractured rock is unevenly distributed, which contradicts the porous medium approach. Some idealized examples are given to investigate where to find low hydraulic gradients. The ability of a laminar pipe-flow model to reproduce the hydrodynamic transport of contaminated groundwater in fractured rock is investigated. It is assumed that the cross-section areas in an ensemble of tubes have a gamma distribution. The model is applied to field tracer experiments at two sites. An attempt is made to model a fracture with irregular aperture as a two-dimensional stochastic process with known correlation structure. It is assumed that the fracture aperture is lognormally distributed, and that the flow is laminar. A particle following algorithm is applied. A comparison with the porous medium approach, and with the laminar pipe flow model is made. 135 refs, 41 figs, 4 tabs.}
place = {Sweden}
year = {1994}
month = {Oct}
}