DOI: 10.1016/j.watres.2017.11.058
Scopus记录号: 2-s2.0-85037363184
论文题名: River water infiltration enhances denitrification efficiency in riparian groundwater
作者: Trauth N. ; Musolff A. ; Knöller K. ; Kaden U.S. ; Keller T. ; Werban U. ; Fleckenstein J.H.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 130 起始页码: 185
结束页码: 199
语种: 英语
英文关键词: Denitrification
; Nitrate contamination
; Nitrate stable isotopes
; Riparian zone
; River-groundwater interaction
Scopus关键词: Agriculture
; Aquifers
; Catchments
; Denitrification
; Groundwater pollution
; Groundwater resources
; Hydrogeology
; Infiltration
; Isotopes
; Least squares approximations
; Multivariant analysis
; Nitrates
; Nitrogen removal
; Organic carbon
; Reaction rates
; Denitrification efficiencies
; Groundwater temperatures
; Nitrate contamination
; Partial least squares regression
; Riparian zones
; River-groundwater interactions
; Spearman's rank correlation
; Stable isotopes
; Rivers
; ground water
; nitrate
; organic carbon
; oxygen
; river water
; surface water
; fresh water
; ground water
; nitric acid derivative
; aquifer
; denitrification
; groundwater
; groundwater-surface water interaction
; hydrochemistry
; infiltration
; isotopic analysis
; nitrate
; riparian zone
; river discharge
; river water
; stable isotope
; water depth
; water temperature
; aquifer
; Article
; catchment
; denitrification
; environmental monitoring
; filtration
; Germany
; hydraulic conductivity
; priority journal
; riparian ecosystem
; temperature
; water analysis
; agriculture
; analysis
; chemistry
; denitrification
; river
; water pollutant
; water quality
; Germany
; Agriculture
; Denitrification
; Environmental Monitoring
; Fresh Water
; Germany
; Groundwater
; Nitrates
; Rivers
; Water Pollutants, Chemical
; Water Quality
英文摘要: Nitrate contamination in ground- and surface water is a persistent problem in countries with intense agriculture. The transition zone between rivers and their riparian aquifers, where river water and groundwater interact, may play an important role in mediating nitrate exports, as it can facilitate intensive denitrification, which permanently removes nitrate from the aquatic system. However, the in-situ factors controlling riparian denitrification are not fully understood, as they are often strongly linked and their effects superimpose each other. In this study, we present the evaluation of hydrochemical and isotopic data from a 2-year sampling period of river water and groundwater in the riparian zone along a 3rd order river in Central Germany. Based on bi- and multivariate statistics (Spearman's rank correlation and partial least squares regression) we can show, that highest rates for oxygen consumption and denitrification in the riparian aquifer occur where the fraction of infiltrated river water and at the same time groundwater temperature, are high. River discharge and depth to groundwater are additional explanatory variables for those reaction rates, but of minor importance. Our data and analyses suggest that at locations in the riparian aquifer, which show significant river water infiltration, heterotrophic microbial reactions in the riparian zone may be fueled by bioavailable organic carbon derived from the river water. We conclude that interactions between rivers and riparian groundwater are likely to be a key control of nitrate removal and should be considered as a measure to mitigate high nitrate exports from agricultural catchments. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113066
Appears in Collections: 气候减缓与适应
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作者单位: Helmholtz Center for Environmental Research – UFZ, Department of Hydrogeology, Permoserstraße 15, Leipzig, 04318, Germany; Helmholtz Center for Environmental Research – UFZ, Department of Catchment Hydrology, Theodor-Lieser-Straße 4, Halle (Salle), 06120, Germany; Helmholtz Center for Environmental Research – UFZ, Department of Conservation Biology, Permoserstraße 15, Leipzig, 04318, Germany; Helmholtz Center for Environmental Research – UFZ, Department of Monitoring and Exploration Technologies, Permoserstraße 15, Leipzig, 04318, Germany
Recommended Citation:
Trauth N.,Musolff A.,Knöller K.,et al. River water infiltration enhances denitrification efficiency in riparian groundwater[J]. Water Research,2018-01-01,130