THE DETERMINATION OF LONGITUDINAL DISPERSIVITY IN PREDICTING THE INFLUENCE OF GROUND CONTAMINATION

Abstract

Recently, people often meet the ground contamination in construction work, and this is large amount and should be treated. It is, therefore, necessary to establish the management scheme of using advection-dispersion numerical method and observation on contaminant behavior. This study deals with how to determine the dispersivity. Since the property becomes larger as observation scale increases, it is difficult to know its value based on real behavior. Several experiments on the behavior led the followings: (1) Flow velocity is dominant, (2) Experimental data nearly fit to document data, and (3) Contaminant plume predicted by using document data is larger than real one.