Prediction Of Concentration Changes Of
Trichloroethylene In Contaminated
Groundwater Based On Multivariate Analysis
Author(s)
T. Oiwa1, X. Wang, K. Yasuhara & T. Yokoyama
Abstract
Our numerical simulation based on multivariate analysis was carried out in a
two-dimensional system for prediction using a simple analysis method in
comparison with a three-dimensional numerical simulation. This simulation code
is based on the mass transfer equation containing the adsorption-desorption
potential term caused by the difference between equivalent adsorption quantity
and actual adsorption quantity. The accuracy of this simulation code was
confirmed from the experimental results. Our numerical simulation is targeted
for the prediction of groundwater contamination of Higashine, Yamagata, Japan.
In this city, groundwater contamination by trichloroethylene (TCE) was
confirmed in a 3 2 km area in 1992. A water quality investigation was conducted
at 51 wells in 1993. The main contaminated wells were classified according to
cluster analysis, or multivariate analysis. Long term well monitoring shows that
there are two hydrological systems, one in which TCE concentration is
decreasing, while the other remains unchanged. Under the concept that the depth
of these wells’ strainers exist on the same two-dimensional domain, we have
carried out two-dimensional simulations of the two hydrological systems. The
simulation results correspond well with our monitoring results. The predictive
capability of our combined cluster analysis and two-dimensional numerical
simulation was confirmed and the simulation results show that the environment
of this area is recovering.
Keywords: groundwater, trichloroethylene, multivariate analysis, cluster
analysis, numerical simulation, mass transfer, adsorption, desorption.
Keywords
groundwater, trichloroethylene, multivariate analysis, cluster
analysis, numerical simulation, mass transfer, adsorption, desorption.
Related Book
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