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  • 1
    Language: English
    In: Science of the Total Environment, 15 December 2017, Vol.605-606, pp.598-609
    Description: The main objective of this study is to quantify the groundwater contamination risk of Songhua River Basin by applying a novel approach of integrating public datasets, web services and numerical modelling techniques. To our knowledge, this study is the first to establish groundwater risk maps for the entire Songhua River Basin, one of the largest and most contamination-endangered river basins in China. Index-based groundwater risk maps were created with GIS tools at a spatial resolution of 30 arc sec by combining the results of groundwater vulnerability and hazard assessment. Groundwater vulnerability was evaluated using the DRASTIC index method based on public datasets at the highest available resolution in combination with numerical groundwater modelling. As a novel approach to overcome data scarcity at large scales, a web mapping service based data query was applied to obtain an inventory for potential hazardous sites within the basin. The groundwater risk assessment demonstrated that 〈 1% of Songhua River Basin is at high or very high contamination risk. These areas were mainly located in the vast plain areas with hotspots particularly in the Changchun metropolitan area. Moreover, groundwater levels and pollution point sources were found to play a significantly larger impact in assessing these areas than originally assumed by the index scheme. Moderate contamination risk was assigned to 27% of the aquifers, predominantly associated with less densely populated agricultural areas. However, the majority of aquifer area in the sparsely populated mountain ranges displayed low groundwater contamination risk. Sensitivity analysis demonstrated that this novel method is valid for regional assessments of groundwater contamination risk. Despite limitations in resolution and input data consistency, the obtained groundwater contamination risk maps will be beneficial for regional and local decision-making processes with regard to groundwater protection measures, particularly if other data availability is limited.
    Keywords: Groundwater Contamination Risk ; Hazard ; Intrinsic Vulnerability ; Drastic ; Model Sensitivity ; Songhua River Basin ; Environmental Sciences ; Biology ; Public Health
    ISSN: 0048-9697
    E-ISSN: 1879-1026
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  • 2
    In: Hydrological Processes, 30 January 2018, Vol.32(3), pp.408-420
    Description: The transition zones between rivers and adjacent riparian aquifers are locations of high biogeochemical activities that contribute to a removal of potentially hazardous substances in the aquatic system. The potential of the removal processes depends highly on subsurface water travel times, which can be determined by using the propagation of electrical conductivity (EC) signal from the river into the riparian aquifer. Although this method has been applied and verified in many studies, we observe possible limitations for the usage of EC fluctuation analysis. Our findings are based on EC time series analyses during storm events and artificial hydropeaks induced by watermill operations. Travel times derived by cross‐correlation analysis were compared with travel times calculated based on backward particle tracking of a calibrated transient numerical groundwater flow model. The cross‐correlation method produced only reasonable travel times for the artificial hydropeaks. In contrast, cross‐correlation analysis of the EC data during natural storm events resulted in implausibly negative or unrealistically low travel times for the bulk of the data sets. We conclude that the reason for this behaviour is, first, the low EC contrast between river and groundwater in connection with a strong damping of the infiltrating river EC signal into the subsurface during storm events. Second, the existence of old and less‐mineralized riparian water between the river and the monitoring well resulted in bank‐storage‐driven EC breakthrough curves with earlier arrival times and the subsequent estimation of implausible riparian travel times.
    Keywords: Bank Storage ; Cross‐Correlation ; Electrical Conductivity ; Numerical Groundwater Modelling ; Riparian Zone ; River–Groundwater Interaction
    ISSN: 0885-6087
    E-ISSN: 1099-1085
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  • 3
    Language: English
    In: Environmental Earth Sciences, 2015, Vol.74(2), p.1837(7)
    Description: Byline: Erik Nixdorf (1,2), Cui Chen (1,4), Yuanyuan Sun (3), Olaf Kolditz (1,2,4) Author Affiliation: (1) Department of Environmental Informatics, Helmholtz Centre for Environmental Research, Permoserstr.15, 04318, Leipzig, Germany (2) Applied Environmental System Analysis, Technische Universitat Dresden, Helmholtzstr.10, 01069, Dresden, Germany (3) Chinese Research Academy of Environmental Sciences, Dayangfang, Beiyuan 8, 100012, Beijing, China (4) Sino-German Research Centre on Environmental Information Science (RCEIS), Chinese Academy of Sciences, 11A, Datun Road, Anwai, 100101, Beijing, China Article History: Registration Date: 20/04/2015 Online Date: 06/05/2015
    Keywords: Water Pollution ; Water Resources ; Persistent Organic Pollutants
    ISSN: 1866-6280
    Source: Cengage Learning, Inc.
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  • 4
    Language: English
    In: Environmental Earth Sciences, 7/2015, Vol.74(2), pp.1837-1843
    Description: Issue Title: Thematic Issue: Karst Water Under GCP, Guilin, China
    Keywords: Earth Sciences ; Geology ; Hydrology/Water Resources ; Geochemistry ; Environmental Science and Engineering ; Terrestrial Pollution ; Biogeosciences ; Geology;
    ISSN: 1866-6280
    E-ISSN: 1866-6299
    Source: Springer (via CrossRef)
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  • 5
    Language: English
    In: Environmental earth sciences, 2015, Vol.73(8), pp.4861-4871
    Description: Due to rapid economic development and population growth, China is facing severe water problems that include sea-level rise and increasing salinization, floods, water pollution, water shortage, soil erosion and ecosystem deterioration, as well as biodiversity loss. In recent decades, China is progressively more concerned with its water issues that are now at the center of social and political attention. Having to overcome similar challenges, Germany has taken a leading role in the field of water sciences and technology. In particular, China can benefit from the lessons learnt in Germany concerning the rehabilitation of water resources in areas heavily affected by chemical industry and mining after the reunification in 1989. German-Chinese cooperation in water sciences started over 25 years ago and dealt with increasing challenges in the 21st century. Following the open space workshop during the Water Research Horizon Conference in Berlin 2014, this article provides a view of some of the challenges and potential opportunities of German-Chinese cooperation in water science and technology. ; p. 4861-4871.
    Keywords: Mining ; Biodiversity ; Economic Development ; Open Space ; Water Shortages ; Ecosystems ; Chemical Industry ; Politics ; Population Growth ; Sea Level ; Floods ; Soil Erosion ; Water Pollution
    ISSN: 1866-6280
    E-ISSN: 18666299
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  • 6
    Language: English
    Description: This volume of the Chinese Water Systems subseries offers up-to-date and comprehensive information on various aspects of the Poyang Lake, the largest freshwater lake in China. This volume of the Chinese Water Systems subseries offers up-to-date and comprehensive information on various aspects of...
    Keywords: Science ; Ecological Science, The Biosphere ; Environmental Monitoring ; Hydrology & The Hydrosphere ; Waste Management ; China ; Water Supply & Treatment ; Environmental Science, Engineering & Technology
    ISBN: 9783319977249
    Source: VLeBooks
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  • 7
    Language: English
    Description: This tutorial on the application of the open-source software OpenGeoSys (OGS) in computational hydrology is based on a one-week training course at the Helmholtz Centre...
    Keywords: Earth Sciences -- Hydrogeology; Earth Sciences -- Quantitative Geology; Earth Sciences -- Simulation and Modeling; Earth Sciences -- Environmental Chemistry; Earth Sciences -- Computer Applications in Chemistry
    ISBN: 978-3-319-52808-3
    ISBN: 3319133349
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  • 8
    Language: English
    In: SpringerBriefs in Earth System Sciences
    Description: Intro -- Foreword -- Acknowledgements -- Contents -- 1 Introduction -- 1.1 Catchment Description -- 1.1.1 Topography and Climate -- 1.1.2 Socio-Economy and Land Cover -- 1.1.3 Hydrology -- 1.1.4 Hydrogeology -- 1.1.5 Water Quality -- 1.2 Potential Pressures and Impacts on Acheng Water Supply -- 1.2.1...
    Keywords: Earth Sciences ; Hydrogeology ; Quantitative Geology ; Simulation and Modeling ; Environmental Chemistry ; Computer Applications in Chemistry ; Geography
    ISBN: 9783319528083
    ISBN: 3319528084
    E-ISSN: 97833195
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  • 9
  • 10
    Book
    Book
    Springer International Publishing, Cham
    Language: English
    Keywords: Environment -- Monitoring/Environmental Analysis; Environment -- Hydrology/Water Resources; Environment -- Freshwater & Marine Ecology; Environment -- Waste Management/Waste Technology
    ISBN: 978-3-319-97724-9
    Source: Springer Science & Business Media B.V.
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