This study reports major hexachlorocyclohexane (HCH) isomers percentage changes in Sabacos tarn water mass, a glacial lake located in the Spanish Pyrenees. This chief fluctuation is due to the transference of 180,000 m³ of soil and debris containing 30,000 to 80,000 t of HCH solid waste from the original unlined landfill to a secure cell in 2014, both located in Bailín (Huesca, Spain), at a distance of 24.50 km from Sabocos. A strong shift of HCH isomers percentages in the water body of Sabocos was recorded in water samples encompassing a timespan before, during and after the transfer operation, together with a significant net increase of the total isomers content. Lindane (γ-HCH) was the most abundant isomer in Sabocos water before the Bailín transfer operation, whereas α-HCH isomer recorded highest values after the waste relocation. These results suggest the relevance of local airborne transport, even to areas located in non-prevalent wind directions favored by thermal and topographically induced breeze regimes as in the case of Bailín and Sabocos tarn. Thus, a better understanding of local airborne spreading mechanisms is essential to prevent future pollution episodes and for the design and management of remediation operations in areas affected by HCH worldwide, or other waste products of comparable characteristics.

这项研究报告了位于西班牙比利牛斯山脉的冰川湖Sabacos塔恩水体中主要的六氯环己烷（HCH）异构体百分比变化。这种主要的波动是由于180,000 m ³的转移2014年，来自原始无衬里垃圾填埋场的30,000至80,000吨HCH固体废物到安全牢房的土壤和碎片，都位于距Sabocos 24.50公里的Bailín（西班牙韦斯卡）。在水样品中记录了Sabocos水体中六氯环己烷异构体百分比的强烈变化，包括转移操作之前，期间和之后的时间跨度，以及总异构体含量的显着净增加。在Bailín转移操作之前，林丹（γ-HCH）是Sabocos水中最丰富的异构体，而废物重新定位后，α-HCH异构体的记录值最高。这些结果表明，与像拜伦和萨博科斯塔恩这样的热风和地形诱发的微风机制有利的地区，即使是在非普遍风向的地区，也存在着局部空中运输的相关性。因此，