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  • 1
    UID:
    b3kat_BV025914488
    Format: XVIII, 339 S.: zahlr. graph. Darst.
    ISBN: 3540626433
    Language: Undetermined
    Subjects: Chemistry/Pharmacy , Geography , Agriculture, Forestry, Horticulture, Fishery, Domestic Science , General works
    RVK:
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    Keywords: Boden ; Schadstoff ; Boden ; Schadstoffbelastung ; Chemische Analyse ; Boden ; Schadstoff ; Chemische Analyse ; Bodenprobe ; Bodenanalyse ; Lehrbuch ; Lehrbuch ; Lehrbuch ; Lehrbuch ; Lehrbuch ; Lehrbuch
    URL: Cover
    Author information: Leitschuh, Stephan 1967-
    Author information: Koß, Volker 1949-
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  • 2
    UID:
    kobvindex_GFZ76301
    Format: 106 S. + 1 CD-ROM
    Series Statement: Berichte des IGB 16
    Note: MAB0014.001: ZS-017(16)
    In: Berichte des IGB
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  • 3
    UID:
    edochu_18452_22701
    Format: 1 Online-Ressource (15 Seiten)
    Content: The interactions of groundwater with surface waters such as streams, lakes, wetlands, or oceans are relevant for a wide range of reasons—for example, drinking water resources may rely on hydrologic fluxes between groundwater and surface water. However, nutrients and pollutants can also be transported across the interface and experience transformation, enrichment, or retention along the flow paths and cause impacts on the interconnected receptor systems. To maintain drinking water resources and ecosystem health, a mechanistic understanding of the underlying processes controlling the spatial patterns and temporal dynamics of groundwater–surface water interactions is crucial. This Special Issue provides an overview of current research advances and innovative approaches in the broad field of groundwater–surface water interactions. The 20 research articles and 1 communication of this Special Issue cover a wide range of thematic scopes, scales, and experimental and modelling methods across different disciplines (hydrology, aquatic ecology, biogeochemistry, environmental pollution) collaborating in research on groundwater–surface water interactions. The collection of research papers in this Special Issue also allows the identification of current knowledge gaps and reveals the challenges in establishing standardized measurement, observation, and assessment approaches. With regards to its relevance for environmental and water management and protection, the impact of groundwater–surface water interactions is still not fully understood and is often underestimated, which is not only due to a lack of awareness but also a lack of knowledge and experience regarding appropriate measurement and analysis approaches. This lack of knowledge exchange from research into management practice suggests that more efforts are needed to disseminate scientific results and methods to practitioners and policy makers.
    Content: Peer Reviewed
    In: Water, Basel : MDPI, 22,2020,1
    Language: English
    URL: Volltext  (kostenfrei)
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  • 4
    UID:
    edochu_18452_10027
    ISSN: 1641-5558 , 1641-5558
    Content: Lake Altmühlsee in Middle Franconia, Germany, was constructed as part of a water transportation system and flooded in 1986 by River Altmühl. Supply of nutrient rich water resulted in a hypertrophic state characterized by low Secchi depth (
    Content: Peer Reviewed
    In: Studia Quaternaria, , 2004, 21,2004, Seiten 73-86, 1641-5558
    Language: English
    URL: Volltext  (kostenfrei)
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  • 5
    UID:
    edochu_18452_21267
    Format: 1 Online-Ressource (17 Seiten)
    Content: Exchange processes of surface and groundwater are important for the management of water quantity and quality as well as for the ecological functioning. In contrast to most numerical simulations using coupled models to investigate these processes, we present a novel integral formulation for the sediment-water-interface. The computational fluid dynamics (CFD) model OpenFOAM was used to solve an extended version of the three-dimensional Navier–Stokes equations which is also applicable in non-Darcy-flow layers. Simulations were conducted to determine the influence of ripple morphologies and surface hydraulics on the flow processes within the hyporheic zone for a sandy and for a gravel sediment. In- and outflowing exchange fluxes along a ripple were determined for each case. The results indicate that larger grain size diameters, as well as ripple distances, increased hyporheic exchange fluxes significantly. For higher ripple dimensions, no clear relationship to hyporheic exchange was found. Larger ripple lengths decreased the hyporheic exchange fluxes due to less turbulence between the ripples. For all cases with sand, non-Darcy-flow was observed at an upper layer of the ripple, whereas for gravel non-Darcy-flow was recognized nearly down to the bottom boundary. Moreover, the sediment grain sizes influenced also the surface water flow significantly.
    Content: Peer Reviewed
    In: Water, Basel : MDPI, 11,2019,7
    Language: English
    URL: Volltext  (kostenfrei)
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  • 6
    UID:
    edochu_18452_19535
    Format: 1 Online-Ressource (10 Seiten)
    ISSN: 2045-2322 , 2045-2322
    Content: Bioirrigation or the transport of fluids into the sediment matrix due to the activities of organisms such as bloodworms (larvae of Diptera, Chironomidae), has substantial impacts on sediment respiration in lakes. However, previous quantifications of bioirrigation impacts of Chironomidae have been limited by technical challenges such as the difficulty to separate faunal and bacterial respiration. This paper describes a novel method based on the bioreactive tracer resazurin for measuring respiration in-situ in non-sealed systems with constant oxygen supply. Applying this new method in microcosm experiments revealed that bioirrigation enhanced sediment respiration by up to 2.5 times. The new method is yielding lower oxygen consumption than previously reported, as it is only sensitive to aerobic heterotrophous respiration and not to other processes causing oxygen decrease. Hence it decouples the quantification of respiration of animals and inorganic oxygen consumption from microbe respiration in sediment.
    Note: Nachgenutzt gemäß den CC-Bestimmungen des Lizenzgebers bzw. einer im Dokument selbst enthaltenen CC-Lizenz.
    In: Scientific Reports, : Nature Publishing Group, 6,2016,27329, 2045-2322
    Language: English
    URL: Volltext  (kostenfrei)
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  • 7
    UID:
    edochu_18452_19534
    Format: 1 Online-Ressource (4 Seiten)
    ISSN: 1744-9561 , 1744-9561
    Content: While lakes occupy less than 2% of the total surface of the Earth, they play a substantial role in global biogeochemical cycles. For instance, shallow lakes are important sites of carbon metabolism. Aerobic respiration is one of the important drivers of the carbon metabolism in lakes. In this context, bioturbation impacts of benthic animals (biological reworking of sediment matrix and ventilation of the sediment) on sediment aerobic respiration have previously been underestimated. Biological activity is likely to change over the course of a year due to seasonal changes of water temperatures. This study uses microcosm experiments to investigate how the impact of bioturbation (by Diptera, Chironomidae larvae) on lake sediment respiration changes when temperatures increase. While at 5°C, respiration in sediments with and without chironomids did not differ, at 30°C sediment respiration in microcosms with 2000 chironomids per m2 was 4.9 times higher than in uninhabited sediments. Our results indicate that lake water temperature increases could significantly enhance lake sediment respiration, which allows us to better understand seasonal changes in lake respiration and carbon metabolism as well as the potential impacts of global warming.
    In: Biology Letters, : The Royal Society Publishing, 12,2016,8, 1744-9561
    Language: English
    URL: Volltext  (kostenfrei)
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  • 8
    UID:
    kobvindex_ZAF0029144
    Format: 106 S. , graph. Darst. + 1 CD-ROM
    ISSN: 1432-508X
    Series Statement: Berichte des IGB
    Language: Undetermined
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  • 9
    UID:
    b3kat_BV025298796
    Format: 144 S. , Ill., graph.Darst., Kt.
    Note: Berlin, Humboldt-Univ., Diss., 2002
    Language: German
    Subjects: Biology
    RVK:
    Keywords: Hochschulschrift
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  • 10
    UID:
    b3kat_BV025292638
    Format: X, 144 S. , Ill., graph.Darst., Kt.
    Note: Berlin, Humboldt-Univ., Diss., 2002
    Language: German
    Subjects: Biology
    RVK:
    Keywords: Hochschulschrift
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