Surface water‐groundwater exchange dynamics in buried‐valley aquifer systems
Surface water‐groundwater exchange dynamics in buried‐valley aquifer systems
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埋藏—山谷含水层系统中的地表水—地下水交换动态
DOI：
10.1002/hyp.14066
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发表时间：
2021
影响因子：
3.2
通讯作者：
Soltanian, Mohamad Reza
中科院分区：
文献类型：
--
作者：
Wallace, Corey D.;Soltanian, Mohamad Reza
地下水是全世界饮用水的主要来源，但过量的营养物质和新出现的污染物可能会危及地下水质量，并限制其作为饮用水来源的使用。随着这类污染物在生物圈中日益普遍，必须从根本上了解它们在地下水系统中的去向和迁移，以实施成功的补救战略。研究了冰川潜谷含水层系统内地表水-地下水(地下)交换的动态，分析了它们对河岸沉积物中营养物质和污染物迁移的影响。高电导率相是增强营养物质和污染物输送的优先流动通道，特别是在风暴期间，但整个含水层的输送也取决于地下沉积结构(例如，高电导率和低电导率的夹层相)。温度和比电导测量表明，在河道附近存在广泛的浅层混合，但在远离河流-含水层界面的地方也观察到了地表水的影响。对河流水位和水头的测量表明，风暴期间(即炎热时刻)的大量流量改变了地下水流动模式，甚至在连续的风暴事件之间也是如此，因为河床传导性以及更重要的是河流与含水层之间的水力连通性发生了变化。鉴于潜谷含水层之间类似的物质传输特征，这些发现很可能代表了世界各地的冰川含水层系统。我们的结果表明，基于平均(基本)水流条件的水资源管理决策可能不能准确地反映被评估的系统，并可能降低针对营养物质和新出现的污染物的补救策略的有效性。
Groundwater is a primary source of drinking water worldwide, but excess nutrients and emerging contaminants could compromise groundwater quality and limit its usage as a drinking water source. As such contaminants become increasingly prevalent in the biosphere, a fundamental understanding of their fate and transport in groundwater systems is necessary to implement successful remediation strategies. The dynamics of surface water‐groundwater (hyporheic) exchange within a glacial, buried‐valley aquifer system are examined in the context of their implications for the transport of nutrients and contaminants in riparian sediments. High conductivity facies act as preferential flow pathways which enhance nutrient and contaminant delivery, especially during storm events, but transport throughout the aquifer also depends on subsurface sedimentary architecture (e.g. interbedded high and low conductivity facies). Temperature and specific conductance measurements indicate extensive hyporheic mixing close to the river channel, but surface water influence was also observed far from the stream‐aquifer interface. Measurements of river stage and hydraulic head indicate that significant flows during storms (i.e., hot moments) alter groundwater flow patterns, even between consecutive storm events, as riverbed conductivity and, more importantly, the hydraulic connectivity between the river and aquifer change. Given the similar mass transport characteristics among buried‐valley aquifers, these findings are likely representative of glacial aquifer systems worldwide. Our results suggest that water resources management decisions based on average (base) flow conditions may inaccurately represent the system being evaluated, and could reduce the effectiveness of remediation strategies for nutrients and emerging contaminants.
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加拿大大草原的埋谷含水层：地质学、水文地质学和起源1地球科学部门 (ESS) 贡献 20120131。
DOI：
--
发表时间：
2012
期刊：
影响因子：
--
作者：
D. Cummings;H. Russell;D. Sharpe
通讯作者：
D. Sharpe
影响因子：
4.7
作者：
B. Schaefli;D. Maraun;M. Holschneider
通讯作者：
B. Schaefli;D. Maraun;M. Holschneider
影响因子：
5.4
作者：
A. Sawyer;L. Kaplan;O. Lazareva;H. Michael
通讯作者：
A. Sawyer;L. Kaplan;O. Lazareva;H. Michael
冰川河流、埋谷含水层异质性的地质统计模型
DOI：
--
发表时间：
1994
期刊：
影响因子：
--
作者：
R. Ritzi;Dale F. Jayne;A. Zahradnik;A. A. Field;G. Fogg
通讯作者：
G. Fogg
美国冰川地区第四纪沉积物中承压和非承压含水层的特征和产状
DOI：
10.3133/sir20185091
发表时间：
2019
期刊：
Scientific Investigations Report
影响因子：
--
作者：
R. M. Yager;L. J. Kauffman;D. Soller;A. Haj;P. M. Heisig;C. A. Buchwald;S. Westenbroek;James E. Reddy
通讯作者：
James E. Reddy