Distribution and genesis of high iodine shallow groundwater in Henan section of Guohe Basin
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摘要: 通过分析涡河流域河南段249组浅层地下水样,发现浅层高碘地下水分布面积为5 818.9 km2,占总面积的51.97％,主要分布于研究区北部、东北部,其次分布于太康县的东部地区。第四纪松散沉积物中的碘是浅层地下水中碘的主要来源。气候条件使得浅层地下水中的碘倾向于聚集,地形地貌控制下的地下水流场以及抽取地下水灌溉庄稼的过程,均使浅层地下水中的碘逐渐浓缩而形成浅层高碘地下水。Abstract: By analyzing 249 groups of shallow groundwater samples in Henan section of Guohe Basin, it is found that the area of high iodine shallow groundwater covers 5 818.9 km2, accounting for 51.97％ of the total. It is widely distributed in the north and northeast of the study area, followed by the east of Taikang County. Iodine in the shallow groundwater of the study area is mainly sourced from the Quaternary loose sediments. The combination of climate condition, the groundwater flow field constrained by topography and the groundwater pumping for crops irrigation is the prerequisite for the gradual concentration of iodine in the shallow groundwater.
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Key words:
- Guohe Basin /
- Henan section /
- high iodine groundwater /
- shallow groundwater /
- groundwater flow field
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