Direct simulation of ground water age in the Rabis Creek Aquifer, Denmark

被引:20
作者
Engesgaard, P
Molson, J
机构
[1] Tech Univ Denmark, Groundwater Res Ctr, Dept Hydrodynam & Water Resources, DK-2800 Lyngby, Denmark
[2] Univ Waterloo, Waterloo Ctr Groundwater Res, Waterloo, ON N2L 3G1, Canada
关键词
D O I
10.1111/j.1745-6584.1998.tb02831.x
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
The steady-state ground water age distribution in the Rabis Creek Aquifer in Denmark is simulated directly and compared to the age estimated from observed tritium concentrations at three wells. The simulation code is based on an existing solute transport code, modified to include a zero-order rate term of unity to account for the aging of ground mater by one day per one day elapsed. The directly simulated ages of the observed tritium peaks agree to within less than four years with the observations. The tritium peaks would have been located to within 2 m vertically if the directly simulated ages had been used to select sampling depths in the three wells. An analytical solution that assumes that the geology is uniform and rectangular is shown to be a useful tool as a firsthand estimate of the age distribution. However, ages from a numerical direct age simulation that account for nonuniform aquifer properties agree better with the observed ages.
引用
收藏
页码:577 / 582
页数:6
相关论文
共 19 条
[1]  
Appelo C.A.J., 2004, Groundw. Pollut.
[2]  
Bear J., 1988, DYNAMICS FLUIDS PORO
[3]   CONTINUOUS FLOW SYSTEMS - DISTRIBUTION OF RESIDENCE TIMES [J].
DANCKWERTS, PV .
CHEMICAL ENGINEERING SCIENCE, 1953, 2 (01) :1-13
[4]   Large-scale dispersion in a sandy aquifer: Simulation of subsurface transport of environmental tritium [J].
Engesgaard, P ;
Jensen, KH ;
Molson, J ;
Frind, EO ;
Olsen, H .
WATER RESOURCES RESEARCH, 1996, 32 (11) :3253-3266
[5]   THE DUAL FORMULATION OF FLOW FOR CONTAMINANT TRANSPORT MODELING .1. REVIEW OF THEORY AND ACCURACY ASPECTS [J].
FRIND, EO ;
MATANGA, GB .
WATER RESOURCES RESEARCH, 1985, 21 (02) :159-169
[6]   SIMULATION OF THE BORDEN PLUME USING THE ALTERNATING DIRECTION GALERKIN TECHNIQUE [J].
FRIND, EO ;
HOKKANEN, GE .
WATER RESOURCES RESEARCH, 1987, 23 (05) :918-930
[7]   A CRITICAL-REVIEW OF DATA ON FIELD-SCALE DISPERSION IN AQUIFERS [J].
GELHAR, LW ;
WELTY, C ;
REHFELDT, KR .
WATER RESOURCES RESEARCH, 1992, 28 (07) :1955-1974
[8]   Direct simulation of groundwater age [J].
Goode, DJ .
WATER RESOURCES RESEARCH, 1996, 32 (02) :289-296
[9]  
GUIGUER N, 1994, FLOTRANS USER GUIDE