Insights onto Hydrologic and Hydro-Chemical Processes of Riparian Groundwater Using Environmental Tracers in the Highly Disturbed Shaying River Basin, China
Insights onto Hydrologic and Hydro-Chemical Processes of Riparian Groundwater Using Environmental Tracers in the Highly Disturbed Shaying River Basin, China
复制标题
利用环境示踪剂洞察中国高度扰动沙颍河流域河岸地下水水文和水化学过程
DOI：
10.3390/w12071939
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发表时间：
2020-07
期刊：
影响因子：
3.4
通讯作者：
Xu Yingchun
中科院分区：
文献类型：
--
作者：
Li Baoling;Song Xianfang;Yang Lihu;Yao Dongxu;Xu Yingchun
了解河岸带的水文水化学过程，对河岸带水资源的管理和保护具有重要意义。本文以我国沙颍河流域为研究区，研究了该流域的生物多样性。本研究利用环境示踪剂（222 Rn、δ 18 O和δD的水化学和同位素数据）和相应的模型（双组分混合模型和222 Rn质量平衡模型）研究了河岸带地下水的水文和水化学过程。结果表明，西华（J8）、周口（Y1）、洛河（S2）、沈丘（SY 2）等地的河流均有地下水入渗，丰水期河流与地下水的混合程度大于枯水期。222 Rn质量平衡模型计算结果表明，采样期间周口闸前河水渗漏通量为3.27 × 10−4 m3/（s·m），沈丘闸前地下水排泄通量为3.50 × 10−3 m3/（s·m）。阳离子交换和含水层矿物（包括方解石、白云石、石膏和岩盐）的溶解/沉淀受地球化学过程控制。未经处理的污水排放和化肥使用是影响地表水和河岸地下水化学过程的主要人为活动。此外，贾鲁河下游和沙颍河沈丘县的地下水污染物对河流水质构成潜在威胁，丰水期地下水排放量较大，可能导致大量的硝态氮输入。
Understanding the hydrologic and hydrochemistry processes in the riparian area is of great importance for managing and protecting riparian water resources. This paper took a highly disturbed and polluted Shaying River Basin (SRB) of China as the study area. In this research, environmental tracers (hydrochemical and isotopic data of222Rn, δ18O, and δD) and corresponding models (two-component mixing model and 222Rn mass balance model) were employed to investigate the hydrologic and associated hydro-chemical process of riparian groundwater. The results indicated that rivers received groundwater discharge located at Xihua (J8), Zhoukou (Y1), Luohe (S2), and Shenqiu (SY2), and the mixing extent with groundwater was greater in wet seasons than in dry seasons. The 222Rn mass balance model showed that the flux of river water leakage was 3.27 × 10−4 m3/(s·m) at the front of Zhoukou sluice while groundwater discharge was 3.50 × 10−3 m3/(s·m) at the front of Shenqiu sluice during the sampling period. The cation exchange and the dissolution/precipitation of aquifer minerals (including calcite, dolomite, gypsum, and halite) were dominated by geochemical processes. The untreated sewage discharge and fertilizer usage were the main anthropogenic activities affecting the hydrochemistry process in surface water and riparian groundwater. Additionally, our results found that nitrate pollutants derived by riparian groundwater were potential threats to river quality at the lower reaches of Jialu River and Shenqiu county of Shaying River, where the nitrate inputs could be larger during the wet seasons because of higher groundwater discharge.
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影响因子：
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作者：
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