| 内蒙古河套平原浅层高铁高氟地下水分布与成因 |
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| 关键词:Hetao Plain high iron groundwater high fluoride groundwater distribution characteristics formation cause |
| 基金项目:中国地质调查局地质调查项目“内蒙古河套高砷地区地下水勘查与供水安全示范”项目(编号: 1212010634702);“中国北方主要平原(盆地)地下水动态调查评价综合研究”项目(编号: 1212010813098);国家财政专项“国家级地质环境监测与预报”项目(编号: 1212140501001) |
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| Distribution and Causes of High-iron and High-fluoride Shallow Groundwater in the Hetao Plain of Inner Mongolia |
| Distribution, geochemical characteristics of high-iron and high-fluoride groundwater and source of iron and fluoride in the Hetao Plain of Inner Mongolia was discussed in detail based on such means as field investigation, monitoring, data analysis and experiment test in order to find out distribution and formation cause of high-iron and high-fluoride groundwater. The results show that high-iron groundwater is mainly distributed in the alluvial and lacustrine plain areas in the middle part of the plain, and high-iron groundwater presents high content in low-lying areas and groundwater discharge zone in plane level; High-fluorine groundwater is mainly in zoning distribution in the piedmont alluvial fan zone. With the scope of 12510.83 km2 of the research area, there are 9310.66 km2 high-iron groundwater and 2308.35 km2 high-fluoride groundwater in shallow groundwater of 10~40 m in depth, which respectively takes 74.40% and 18.45% of the total research area. Researches indicate that the main formation cause for high-iron groundwater and high-fluoride groundwater is its natural geological environment, resulted from environmental hydrogeochemical action under different geo-environmental conditions. The iron in the groundwater mainly comes from plenty of quaternary sediments brought by the Yellow River while the major cause for dissolution is the changes of the redox conditions; the fluorine in the groundwater mainly comes from the mountainous area near the plain, and climate, geological structure, hydrogeololgy and hydrochemical conditions are the main factors of fluorine concentration. Researches show that there is no positive correlation relationship between high-iron groundwater and high-fluorine groundwater in the Hetao Plain. |
| FENG Cui-e,GAO Cun-rong,WANG Jun-tao,LIU Wen-bo,SONG Jian-xin,KANG Wei.2015.Distribution and Causes of High-iron and High-fluoride Shallow Groundwater in the Hetao Plain of Inner Mongolia[J].Acta Geoscientica Sinica,36(1):67-76. |
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