地下水浅埋区某加油站特征污染物空间分布

加油站渗漏污染地下水已经是一个世界性的问题。由于浅埋区加油站储罐与地下水密切接触，更加剧储罐的腐蚀。为揭示加油站渗漏的典型污染物石油烃（TPH）、苯系物（BTEX）、萘和甲基叔丁基醚（MTBE）在该水文地质条件下的迁移变化，在浅埋区某加油站开展了平、枯、丰水期的地下水监测工作。在水平分布上，TPH、BTEX、萘基本相似，均在加油岛附近形成高浓度区，而MTBE则更易随地下水流动而迁移，呈现出不同的污染晕。在垂直分布上，地下水的水位变动是污染物浓度分布的主要影响因素。

Spatial distribution of typical pollutants of gas stations in shallow water-table areas

Leakage and spilling of the gas stations is a worldwide problem. The underground storage tanks of shallow water-table areas are closely contacted with groundwater, which enhance their corrosion. Groundwater monitoring was carried out in dry, temperate, and wet seasons at a concerned gas station in shallow water-table area in order to reveal the migration and transformation mechanisms of total petroleum hydrocarbon（TPH） , ben- zene, toluene, ethylbenzene, and xylene （BTEX）, naphthalene and methyl tert-butyl ether（MTBE） in such are- a. The horizontal distribution of TPH, BTEX, naphthalene was similar, and the high concentration appeared at filling island. MTBE migrated with groundwater flow, and appeared different pollution plum. Water level fluctua- tion is the main factors of the vertical distribution of contaminates.