| 汉江下游河水-地下水侧向交互带中溶解态锰的分布特征 |
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| 引用本文： | 马奥兰,刘慧,毛胜军,朱子超,李民敬.汉江下游河水-地下水侧向交互带中溶解态锰的分布特征[J].地球科学,2022,47(2):729-741. |
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| 作者姓名： | 马奥兰 刘慧 毛胜军 朱子超 李民敬 |
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| 作者单位： | 1.中国地质大学环境学院, 湖北武汉 430078 |
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| 基金项目： | 国家自然科学基金重点项目（No.41830862）；;国家创新群体项目（No.41521001）； |
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| 摘 要： | 江汉平原浅层地下水中锰含量普遍较高，探究锰在河流交互带中的分布特征有助于认识交互带中锰的生物地球化学过程，对水质的保护具有重要指导意义.通过监测汉江下游侧向交互带河水、地下水中溶解态锰含量及其相关指标，分析不同河水-地下水交互作用方向下溶解态锰的时空分布规律，并探讨其成因.结果表明:研究区侧向交互带中靠近河岸带区域存在溶解态锰的富集，且在有局部反向流的地方锰含量较高；该局部富集的现象在河水补给地下水的交互带中更加明显；泄洪后该富集区域随水流方向发生迁移；研究区地下水中锰的含量与HCO3-、Ca2+、Mg2+呈极显著正相关，与NO3-、Fe2+显著负相关，但与交互带地下水中Eh和pH不相关.交互带溶解态锰的时空分布受地形条件、水动力和水化学的共同影响.
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| 关 键 词： | 交互带 溶解态锰 时空分布 汉江下游 水化学 水文地质 |
| 收稿时间： | 2021-09-13 |
Distribution Characteristics of Dissolved Manganese in the Lateral Hyporheic Zone between River and Groundwater in the Lower Reaches of the Han River |
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| Ma Aolan,Liu Hui,Mao Shengjun,Zhu Zichao,Li Minjing.Distribution Characteristics of Dissolved Manganese in the Lateral Hyporheic Zone between River and Groundwater in the Lower Reaches of the Han River[J].Earth Science-Journal of China University of Geosciences,2022,47(2):729-741. |
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| Authors: | Ma Aolan Liu Hui Mao Shengjun Zhu Zichao Li Minjing |
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| Abstract: | The content of manganese in shallow groundwater in Jianghan Plain is generally high. Studying the distribution characteristics of manganese in the hyporheic zone helps to understand manganese's biogeochemical process in the hyporheic zone. It is of great significance for guiding the protection of river and groundwater quality. This study takes the lateral hyporheic zone in the Han River's lower reaches as the research object. The temporal and spatial distribution of dissolved manganese under different interaction directions between river and groundwater in the lateral hyporheic zone is studied and discussed by detecting manganese concentration and its related parameters in the river and groundwater. The results showed that the dissolved manganese is enriched in the river-groundwater lateral interaction zone near the riparian zone, and the manganese content is higher in the place where there is local reverse flow; The phenomenon of local enrichment is more obvious in the interactive zone where river water supplies groundwater. After flooding for 1-3 months, the enrichment area migrates with the direction of water flow; The dissolved manganese concentration in the groundwater of the study area has a very significant positive correlation with HCO3-, Mg2+, Ca2+, and has a remarkably substantial negative correlation with NO3-. It is also negatively correlated with Fe2+. However, it is not related to the Eh and pH of groundwater in the hyporheic zone.In a word, the spatial and temporal distribution of dissolved manganese in the hyporheic zone is influenced by topographic conditions, hydrodynamics and hydrochemistry. |
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