APPLICATION OF MONITORING AND CONTROL TECHNOLOGY IN EMERGENCY DISPOSAL OF GROUNDWATER POLLUTION

The high-risk characteristics of petrochemical enterprises generally lead to sudden water environmental pollution accidents such as leakage and explosion.

This study based on the analysis of the hydrogeological conditions and pollution in site, predicted the pollution range with Visual MODFLOW, set the monitoring equipment in monitoring wells. With the dynamic monitoring and timely warning information for groundwater pollution carried out in site, discussed the main influencing factors of pumping to monitoring wells. According to three optimization methods, put forward the optimal layout scheme of monitoring wells in accordance with strong permeability and high concentration zones in the sites, achieve the goal of combining monitoring and extraction in time.

The main researching contents of this study and results are as follows:

1) Proposed the targeted pollution monitoring and control scheme for the high-concentration and high-permeability sites. Combined with traditional hydrogeological technical methods, achieve the combination of groundwater monitoring, early warning and pollution accident control, meet the requirements of the site pollution emergency disposal.

2) According to the Visual MODFLOW three-dimensional groundwater flow model, monitoring and control wells are set up to predict the contaminant migration range of leakage accidents on site; set monitoring equipment and monitoring frequency for monitoring wells to detect contaminants in groundwater as early as possible in order to achieve early warning.

3) Based on 33 schemes of monitoring and control well layout and pumping plans that been designed for the petrochemical site. Combined with weighted average method and the objectives consideration comprehensively, the recommended scheme 19 is used as the layout method and pumping scheme of the monitoring and control well of the petrochemical site finally.