Laboratorial monitoring of the LNAPL contamination process using electrical resistivity tomography
轻非水相液体污染过程的高密度电阻率成像法室内监测

In order to investigate the effectiveness of ERT in monitoring LNAPL migration and delineating its spatial distribution in unsaturated porous media,a LNAPL contaminant experiment was made with a sand box and ERT measurement was conducted to monitor the LNAPL contamination process.After the contamination test,the sand was excavated layer by layer and digital pictures were recorded.The results show that the spatial range and shape of the contaminated area obtained from the ERT coincide with that recorded very well,and the contamination process of LNAPL is clearly reflected from the temporal variations of the 3-D resistivity relative variation rate.This means that it is possible to use the ERT to monitor the LNAPL migration and delineate its spatial distribution in the unsaturated porous media.