基于GMS的油品泄漏污染模拟及处理措施

Study on Simulations and Control Measures of Leaking Oil Pollution Based on GMS

研究采用地下水模拟软件(GMS)进行了穿越地下含水层的输油管道泄漏时油品在地下水中的扩散和迁移过程。在模拟出预期的地下流场后,采用溶质迁移模块进行扩散模拟,并成功预测了在特定时期的污染情形和浓度分布。泄漏油品的迁移路径与地下水流动方向基本一致,并且在第1 700d左右将会汇入最近的河流中造成更大的危害。结合模拟结果和现有的防治措施,分别作了防渗墙和抽出处理的情景模拟,结果显示防渗墙将推迟污染物进入河流的时间,而设置抽水井可以有效处理地下水石油污染。

Taking an oil pipeline crossing an underground aquifer as a case in this paper,the diffusion and migration of leaking oil forced by groundwater action are simulated by Groundwater Model System(GMS).The MT3 DMS model is used to model the diffusion and predict the pollution and concentration distribution in special periods after getting the expectable groundwater flow field.The simulation result is that the migration path of leaking oil is consistent with the flow direction of groundwater and the oil would flow into the nearest river after 1700 days resulting in more severe damage.The impervious wall and pumping well are simulated according to the simulation result and existing control measures,and the result shows the impervious wall could delay the entry of pollutants into the river and the pumping well would reduce pollutant concentration effectively.