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.

Item Type:	Refereed Article
Keywords:	flood, sediment, fingerprinting, climate variability, climate change, uncertainty
Research Division:	Engineering
Research Group:	Environmental Engineering
Research Field:	Environmental Technologies
Objective Division:	Environment
Objective Group:	Land and Water Management
Objective Field:	Land and Water Management of environments not elsewhere classified
Author:	Franks, SW (Professor Stewart Franks)
ID Code:	93396
Year Published:	2003
Web of Science® Times Cited:	61
Deposited By:	Office of the School of Engineering
Deposited On:	2014-07-31
Last Modified:	2018-10-05
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