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Study on the Simulation of Groundwater Petroleum Contaminant and Prevention Measures

Author: GongYongFeng
Tutor: QianHui
School: Chang'an University
Course: Environmental Engineering
Keywords: Groundwater Oil pollution Numerical modeling of groundwater flow Solute transport model Visual MODFLOW Pumping , water treatment systems
CLC: X523
Type: Master's thesis
Year: 2010
Downloads: 317
Quote: 1
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Abstract

Yinchuan City, Ningxia Hui Autonomous Region is an important grain producing areas and industrial areas, groundwater is the city's main source of drinking water and industrial water, while Ningxia refineries and waste dumps located south of the city, surrounding the distribution of two large water supply sources With the continuous development of the regional economy, increasing demand for oil in the oil during processing, it may happen for groundwater contamination, to the sustainable development and utilization of groundwater resources to ensure that agricultural and residential water Yinchuan health In this paper, a detailed analysis of existing data and based on the results of previous studies, the use of Visual MODFLOW groundwater system in the study area were simulated, the establishment of appropriate hydrogeological conceptual model and numerical model of groundwater flow. After the validated model can better reflect the movement characteristics of the groundwater system. In this flow model based on the establishment of a conservative tracer to simulate solute transport factor model, using Visual MODFLOW MT3DMS in the water quality model is solved in three different simulations of oil pollution in the study area predict groundwater, and in accordance with the predicted results and the reasonable prevention and treatment programs. Model predictions show: within one year under normal operating conditions the main pollutants in the unconfined aquifer surface lot enrichment, confined aquifers are not contaminated. And when incidents pollutant movement area 2 times larger than the normal operating conditions. Add a reaction entry, pollution halo area change is small, but there are significant concentrations of pollutants decreasing trend. Predict water quality model results indicate that the study area may be contaminated groundwater. If the cause of pollution, unconfined aquifer occurs mainly convection pollution, pollution levels will be particularly serious, confined aquifer is also likely to be more polluted stream. Therefore, it is necessary to raise the prevention and control programs. Preventive measures include: (a) adjustment of water supply, enhance water management; (2) Set seepage facilities, inhibiting contaminants leaking; (3) improve the monitoring process, establish a sound monitoring system. Governance program selection pumping, water treatment systems. Through comparative analysis of four different governance program of the treatment effect, and ultimately selected pumping flow 1000m3 / L, water flow rate 500m3 / L pumping, water injection system as a petroleum-contaminated groundwater in the study area of ??governance programs. After a year of treatment, the oil removal rate of 90.08% of pollutants, pollution halo area is reduced by 68.2% full description of the program for oil pollution of groundwater governance.

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CLC: > Environmental science, safety science > Environmental pollution and its prevention > Water pollution and its control > Groundwater
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