Rapid assessment of gully sidewall erosion rates in data-poor catchments: a case study in Australia
Article
Article Title | Rapid assessment of gully sidewall erosion rates in data-poor catchments: a case study in Australia |
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ERA Journal ID | 1803 |
Article Category | Article |
Authors | Whitford, J. A. (Author), Newham, L. T. H. (Author), Vigiak, O. (Author), Melland, A. R. (Author) and Roberts, A. M. (Author) |
Journal Title | Geomorphology |
Journal Citation | 118 (3/4), pp. 330-338 |
Number of Pages | 9 |
Year | 2010 |
Place of Publication | Amsterdam, Netherlands |
ISSN | 0169-555X |
1872-695X | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.geomorph.2010.01.013 |
Web Address (URL) | http://www.sciencedirect.com/science/article/pii/S0169555X10000395# |
Abstract | Knowledge of erosion rates and sediment yields from gullies is critical for the effective prioritisation of management efforts aimed at reducing the impact of gully-derived sediments on water quality. This paper describes a rapid assessment method for estimating sidewall gully erosion rates for already established gully networks. It combines a conceptual-empirical model of the cycle of gully initiation and stabilisation with an easy-to-apply technique for assessing gully extent and dimensions. The method is illustrated using a case study of the Avon-Richardson Catchment of north-central Victoria, Australia. It is estimated that a total of 4.6×106tonnes of sediment have been generated in that catchment from gully erosion since the latest major phase of gullying in the mid 1800s. This is equivalent to 8.9tha-1y-1 if sediment generation was evenly distributed spatially and temporally across the 3300km2 catchment over 160years prior to 2010. Current rates of gully erosion are estimated to be 4700ty-1 (equivalent to 1.4tha-1y-1). The results are comparable with observed rates of sidewall erosion in the Avon-Richardson Catchment. Further testing is required to build confidence in its applicability to assess sediment yields and for assisting regional authorities to plan remediation efforts. |
Keywords | erosion rates; gully erosion model; rapid assessment; sediment generation |
ANZSRC Field of Research 2020 | 370704. Surface water hydrology |
370509. Sedimentology | |
410601. Land capability and soil productivity | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Department of Primary Industries, Victoria |
Australian National University | |
Teagasc Agriculture and Food Development Authority, Ireland | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q2901/rapid-assessment-of-gully-sidewall-erosion-rates-in-data-poor-catchments-a-case-study-in-australia
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