| 江西兴国县溶解性总固体分布规律初探 |
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| 引用本文：龚磊,王新峰,宋绵,张涛,吴玺.2018.江西兴国县溶解性总固体分布规律初探[J].地球学报,39(5):587-592. |
| DOI：10.3975/cagsb.2018.071002 |
| 摘要点击次数: 1839 |
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| 基金项目:中国地质调查局地质调查项目(编号: DD20179262);国家自然科学基金项目(编号: 41240021; 41330314) |
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| 中文摘要:本文聚焦于反映地下水宏量离子组分总量的溶解性总固体, 应用统计描述、相关分析法、离子比例法分析了其在兴国县全境的分布演化规律。结果表明, 兴国县89.8%采样点的溶解性总固体含量都处于 200 mg/L以内, 但存在空间分布差异显著, 在松散岩类孔隙水、碎屑岩类孔隙裂隙水、变质岩类裂隙水和花岗岩类裂隙水中溶解性总固体的变异系数分别为0.37、0.77、0.56和0.59。对1977—2018年两期地下水水质数据分析, 兴国县地下水中溶解性总固体不论是单点极值还是均值, 均呈现大幅增加的趋势, 其含量增幅在24.23%~458.13%之间。在空间分布上, 溶解性总固体分布与高程具有较好的相关性, 高溶解性总固体的地下水普遍分布在400 m高程以下。兴国县对地下水开发的增加, 改变了地下水的补径排条件, 加速了地下水与围岩和岩石矿物风化组分间的溶滤和离子交换, 使Na+浓度减少, Ca2+和Mg2+含量增加。 |
| 中文关键词:地下水 溶解性总固体 空间分布 兴国县 |
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| Characteristics of Total Dissolved Solids in Xingguo County, Jiangxi Province |
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| Abstract:This paper focuses on the total dissolved total solid which is the total amount of the ion component of the groundwater, and analyzes its distribution and evolution in Xingguo County by statistical description, correlation analysis and ion ratio method. The results showed that total dissolved solids of groundwater content of 89.8% samples in Xingguo County was generally within 200 mg/L, and there were significant differences in spatial distribution. The variation coefficients of dissolved total solids in pore water, clastic rock pore-fissure water, metamorphic rock fissure water and granitoid fissure water are 0.37, 0.77, 0.56 and 0.59 respectively. According to the analysis of the groundwater quality data of the period of 1977—2018, the total dissolved solids in the groundwater of Xingguo County, regardless of the single point value or the mean value, showed a significant increase trend, with the increase of the content being 24.23%~458.13%. In terms of spatial distribution, the distribution of dissolved total solids has a good correlation with the elevation. The groundwater with high total dissolved solids is generally distributed below 400 m. The increase of groundwater development in Xingguo County has changed the drainage conditions of groundwater, accelerated the leaching and ion exchange between the ground water and the weathering components of rock and rock minerals, reduced the concentration of Na+, and increased the content of Ca2+ and Mg2+. |
| keywords:groundwater total dissolved solids spatial distribution Xingguo County |
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