输油管道泄漏地下水污染风险预警评价方法

输油管道具有里程长、输送介质高危、管道沿线水文地质条件复杂等特点,一旦油品在环境敏感区发生泄漏,将会造成严重的环境污染事件。以某环境高后果区为例,基于Visual-Modflow软件,建立概念模型、水流模型及溶质运移模型,模拟输油管道泄漏情景下石油烃在地下水中的迁移扩散规律,采用改进的内梅罗综合指数评价法对地下水状态进行预警,根据水质变化速率与预警级别之间的关系确定不同井的预警级别。结果表明:采用输油管道泄漏地下水污染风险预警评价,能够有效预警油品泄漏情况,预判输油管道泄漏溢油扩散趋势。

Early warning evaluation method of groundwater pollution risk in oil pipeline leakage

Oil pipelines are characterized with long mileage,high risk of transportation medium and complex hydrogeological conditions.Once oil leaking occurs in environmentally sensitive areas,serious environmental pollution may be caused.Taking a high consequence area of an environment as example,a conceptual model,a water flow model and a solute transport model were established on the base of Visual-Modflow software to simulate the migration and diffusion law of petroleum hydrocarbon in groundwater under the situation of oil pipeline leakage.The state of groundwater was early warned with the improved Nemero comprehensive pollution index method,and the early-warning level of different wells was determined according to the relationship between the change rate of water quality and the early-warning level.As indicated in the results,evaluation on early warning of the pollution risk of groundwater in case that leakage occurs to an oil pipeline,could effectively pre-warn the leakage of oil and predict the diffusion trend of the leaked oil of the pipeline.