Reyes-López Jaime A, Ramírez-Hernández Jorge, Lázaro-Mancilla Octavio, Carreón-Diazconti Concepción, Garrido Miguel Martín-Loeches
Instituto de Ingeniería, Universidad Autónoma de Baja California, Boulevard, Benito Juárez y Calle de La Normal S/N. Insurgentes Este, 21280 Mexicali, Baja California, Mexico.
Waste Manag. 2008;28 Suppl 1:S33-9. doi: 10.1016/j.wasman.2008.03.024. Epub 2008 Jul 1.
In México, uncontrolled landfills or open-dumps are regularly used as "sanitary landfills". Interactions between landfills/open-dumps and shallow unconfined aquifers have been widely documented. Therefore, evidence showing the occurrence of aquifer contamination may encourage Mexican decision makers to enforce environmental regulations. Traditional methods such as chemical analysis of groundwater, hydrological descriptions, and geophysical studies including vertical electrical sounding (VES) and ground penetrating radar (GPR) were used for the identification and delineation of a contaminant plume in a shallow aquifer. The Guadalupe Victoria landfill located in Mexicali is used as a model study site. This landfill has a shallow aquifer of approximately 1m deep and constituted by silty sandy soil that may favor the transport of landfill leachate. Geophysical studies show a landfill leachate contaminant plume that extends for 20 and 40 m from the SE and NW edges of the landfill, respectively. However, the zone of the leachate's influence stretches for approximately 80 m on both sides of the landfill. Geochemical data corroborates the effects of landfill leachate on groundwater.
在墨西哥，未经管控的垃圾填埋场或露天垃圾场常被用作“卫生填埋场”。垃圾填埋场/露天垃圾场与浅层无压含水层之间的相互作用已有大量文献记载。因此，有证据表明含水层受到污染可能会促使墨西哥的决策者执行环境法规。传统方法，如对地下水进行化学分析、进行水文描述以及开展包括垂向电测深（VES）和探地雷达（GPR）在内的地球物理研究，被用于识别和描绘浅层含水层中的污染物羽状物。位于墨西卡利的瓜达卢佩·维多利亚垃圾填埋场被用作模型研究场地。该垃圾填埋场有一个深度约为1米的浅层含水层，由粉质砂土构成，这可能有利于垃圾渗滤液的运移。地球物理研究表明，垃圾渗滤液污染物羽状物分别从垃圾填埋场的东南边缘和西北边缘延伸20米和40米。然而，渗滤液的影响区域在垃圾填埋场两侧延伸约80米。地球化学数据证实了垃圾渗滤液对地下水的影响。
