Multi-parameter fingerprinting of sediment deposition in a small gullied catchment in SE Australia

A. K. Krause, S. W. Franks, J. D. Kalma, R. J. Loughran, J. S. Rowan

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    97 Citations (Scopus)

    Abstract

    The determination of relative contributions of potential sediment sources is an important step in the development of management strategies to combat soil erosion. In a 1.2 km2 gullied catchment in southeastern New South Wales, multi-parameter fingerprinting of sediment deposited in successive downstream pools has identified gully walls as the dominant sediment source when the grazed pasture surface was the only other potential source. The median fractional contributions remained relatively steady in the successive downstream pools, with the gully walls responsible for between 90% and 98% of the pool sediment. This result was achieved despite the ratio of the source areas varying considerably between successive nested subareas. Reliability bounds on the predictions, accounting for limited sampling of sources, were well constrained and varied between 5.4% and 13.8%. Downstream of an unsealed road crossing, sediment from the road source dominated the pool sediments such that contributions from the pasture surface and gully sources could not be determined.

    Original languageEnglish
    Pages (from-to)327-348
    Number of pages22
    JournalCATENA
    Volume53
    Issue number4
    Early online date14 Jun 2003
    DOIs
    Publication statusPublished - 1 Nov 2003

    Keywords

    • Fingerprinting
    • Mixing model
    • Sediment sourcing
    • Soil erosion

    ASJC Scopus subject areas

    • Earth-Surface Processes

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