| 内蒙古河套平原地下咸水与高砷水分布特征 |
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| 引用本文：高存荣,刘文波,冯翠娥,刘滨,宋建新.2014.内蒙古河套平原地下咸水与高砷水分布特征[J].地球学报,35(2):139-148. |
| DOI：10.3975/cagsb.2014.02.03 |
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| 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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| 中文摘要:通过实地调查、资料分析和试验测试等方法手段, 详细研究了内蒙古河套平原地下咸水与高砷水的分布特征。结果表明: 河套平原分布有大量的咸水和高砷地下水, 在调查研究区12510.83 km2的范围内, 深度在10~40 m的浅层地下水中, 分布有淡水1145.75 km2、微咸水9025.51 km2、咸水盐水2339.57 km2, 分别占研究区总面积的9.16%、72.14%和18.70%; 在淡水区、微咸水区和咸水盐水区, 分别存在有233.85 km2、2965.74 km2和997.16 km2的高砷(As≥0.05 mg/L)地下水, 占各类水面积的20.41%、32.86%和42.62%; 咸水体分别呈南北两个条带状分布, 北部的咸水体自西向东, 宽度约5~10 km, 在东部地区表现为上淡下咸的水质结构, 南部咸水体分布在总引水干渠北侧呈东西条带状分布, 西部较窄, 东部变宽; 高砷水的分布有明显的东西分区特征, 东部区的高砷水多呈不规则的片状分布, 范围较广, 水中砷含量差异较小, 西部区的高砷水沿山前低洼地带呈北东向的条带状分布, 水中砷含量高, 分布面积较为集中。研究表明: 地下水中的盐分含量与砷含量不存在正相关关系, 但是, 西北部地区高砷地下水的分布与咸水区有一定关系, 认为均受控于构造, 而东部地区高砷水的分布则与咸水无关。 |
| 中文关键词:河套平原 地下咸水 高砷地下水 分布特征 成生关系 |
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| Distribution Characteristics of Saline Groundwater and High-arsenic Groundwater in the Hetao Plain, Inner Mongolia |
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| Abstract: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. |
| keywords:Hetao Plain saline groundwater high-arsenic groundwater distribution characteristics genetic correlation |
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