| 内蒙古河套平原地下咸水与高砷水分布特征 |
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| 关键词:Hetao Plain saline groundwater high-arsenic groundwater distribution characteristics genetic correlation |
| 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) |
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| Distribution Characteristics of Saline Groundwater and High-arsenic Groundwater in the Hetao Plain, Inner Mongolia |
| Distribution characteristics of saline groundwater and high-arsenic groundwater in the Hetao Plain of Inner Mongolia was discussed in detail based on such means as field investigation, data analysis and experiment test. The results show that large amounts of saline groundwater and high-arsenic groundwater are distributed in the Hetao Plain. In shallow groundwater at the depth of 10~40 m in the study area covering 12510.83 km2, the fresh groundwater, lower-saline groundwater and saline groundwater possess 9025.51 km2, 1145.75 km2 and 2339.57 km2 respectively, accounting respectively for 9.16%, 72.14% and 18.70% of the total study area, whereas high-arsenic groundwater (As≥0.05 mg/L) makes up 233.85 km2, 2965.74 km2 and 997.16 km2 in these three sorts of groundwater, accounting respectively for 20.41%, 32.86% and 42.62%. Saline groundwater extends as two zones respectively in the south and the north, and saline groundwater in the north is from the west to the east with the width of 5~10 km. The groundwater quality in the east is characterized by freshness in the upper part and salinization in the lower part. Saline groundwater in the south is in zoning distribution from the west to the east in the north of the water diversion main canal, which is relatively narrow in the west and wide in the east. The distribution of high-arsenic groundwater has obvious zoning characteristics. High-arsenic groundwater is distributed widely in irregular sheet form with insignificant difference of arsenic content in the east, and is distributed in NE-trending banding along low-lying terrain of mountain front region with high arsenic content in the west. The result shows that there is no positive correlation between salt concentration and arsenic concentration in groundwater. However, there does exist certain relation between the distribution of high-arsenic groundwater and the saline area in the northwest area, which is considered to be controlled by structure. And there does not exist such a relation in the east area. |
| GAO Cun-rong,LIU Wen-bo,FENG Cui-e,LIU Bin,SONG Jian-xin.2014.Distribution Characteristics of Saline Groundwater and High-arsenic Groundwater in the Hetao Plain, Inner Mongolia[J].Acta Geoscientica Sinica,35(2):139-148. |
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