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  • Grid-based sediment tracing approach to determine sediment sources

    Author(s)
    Haddadchi, Arman
    Hicks, Murray
    Olley, Jon M
    Singh, Shailesh
    Sriniyasan, IMS
    Griffith University Author(s)
    Olley, Jon M.
    Year published
    2019
    Metadata
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    Abstract
    The diffusive and nonspecific nature of nonpoint source contaminants such as sediment makes their management and mitigation challenging. Conventional source‐based tracing techniques for sediment simply apportion downstream sediment load to diffuse upstream sources classified by a limited number of source types including underlying rock type, land cover, and/or erosion process. Here, we develop a grid‐based sediment tracing technique that improves the precision of source contribution estimates and enhances the granularity of sediment source maps. We test the proposed technique using source and suspended sediment samples ...
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    The diffusive and nonspecific nature of nonpoint source contaminants such as sediment makes their management and mitigation challenging. Conventional source‐based tracing techniques for sediment simply apportion downstream sediment load to diffuse upstream sources classified by a limited number of source types including underlying rock type, land cover, and/or erosion process. Here, we develop a grid‐based sediment tracing technique that improves the precision of source contribution estimates and enhances the granularity of sediment source maps. We test the proposed technique using source and suspended sediment samples collected from the Emu Creek Catchment (911 km2), south‐east Queensland, Australia. Geochemical tracers were employed to distinguish sediments derived from the heterogenous and complex underlying rock types. Importantly, the proposed technique provided a greater spatial resolution of the sediment sources by assigning sediment contributions into grid sources rather than the area‐specific source types.
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    Journal Title
    Land Degradation and Development
    Volume
    30
    Issue
    17
    DOI
    https://doi.org/10.1002/ldr.3407
    Subject
    Chemical sciences
    Earth sciences
    Environmental sciences
    Science & Technology
    Life Sciences & Biomedicine
    Soil Science
    Environmental Sciences & Ecology
    Publication URI
    http://hdl.handle.net/10072/396620
    Collection
    • Journal articles

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