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Multi-parameter fingerprinting of sediment deposition in a small gullied catchment in SE Australia
journal contribution
posted on 2023-05-18, 02:20 authored by Krause, AK, Franks, SW, Kalma, JD, Loughran, RJ, Rowan, JSThe 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.
History
Publication title
CatenaVolume
53Issue
4Pagination
327-348ISSN
0341-8162Department/School
School of EngineeringPublisher
Elsevier Science BvPlace of publication
Po Box 211, Amsterdam, Netherlands, 1000 AeRights statement
Copyright 2003 Elsevier ScienceRepository Status
- Restricted