Hillslope erosion improvement targets: Towards sustainable land management across New South Wales, Australia

Yang, X; Leys, J; Gray, J; Zhang, M

Hillslope erosion improvement targets: Towards sustainable land management across New South Wales, Australia

Yang, X

Leys, J Gray, J Zhang, M

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Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: Catena, 2022, 211, pp. 105956
Issue Date:: 2022-04-01

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Field	Value	Language
dc.contributor.author	Yang, X https://orcid.org/0000-0002-5990-2186
dc.contributor.author	Leys, J
dc.contributor.author	Gray, J
dc.contributor.author	Zhang, M https://orcid.org/0000-0002-5431-9274
dc.date.accessioned	2023-07-02T23:03:48Z
dc.date.available	2023-07-02T23:03:48Z
dc.date.issued	2022-04-01
dc.identifier.citation	Catena, 2022, 211, pp. 105956
dc.identifier.issn	0341-8162
dc.identifier.uri	http://hdl.handle.net/10453/171102
dc.description.abstract	Hillslope erosion, including sheet and rill erosion, is the dominant form of erosion in Australia and many parts of the world. Hillslope erosion improvement (HEI) targets are necessary for the evaluation of natural resource condition and sustainable land use and land management practices. The tolerable soil loss concept has been widely applied to agricultural lands for setting soil erosion targets. It is a static target that is difficult to apply to diverse land uses and soil conditions. In this study, we developed a new approach for setting HEI resource condition targets by considering seasonal erosion levels over a large climate gradient and range of land management practices across New South Wales (NSW), Australia. A 20-year fractional vegetation cover and rainfall erosivity time-series have been used to estimate hillslope erosion rates and assign monthly and annual HEI targets across NSW. To assist with land management action target, monthly vegetation cover levels have been set to meet the HEI targets on a pixel-by-pixel (100 m) basis. We further assessed the HEI targets against land and soil capability classes and their spatial and temporal variation across local land service regions. The findings can help identify the locations and periods of time with hillslope erosion exceeding a desirable threshold level and indicate management actions that might be required to improve the soil condition over areas of concern. The processes are fully automated in a geographic information system (GIS) environment, thus providing a useful tool to determine HEI targets for sustainable soil and land management at any location and period. The methods are globally portable as the input datasets are widely available.
dc.language	en
dc.publisher	Elsevier
dc.relation.ispartof	Catena
dc.relation.isbasedon	10.1016/j.catena.2021.105956
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0403 Geology, 0406 Physical Geography and Environmental Geoscience, 0503 Soil Sciences
dc.subject.classification	Geochemistry & Geophysics
dc.title	Hillslope erosion improvement targets: Towards sustainable land management across New South Wales, Australia
dc.type	Journal Article
utslib.citation.volume	211
utslib.for	0403 Geology
utslib.for	0406 Physical Geography and Environmental Geoscience
utslib.for	0503 Soil Sciences
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Life Sciences
utslib.copyright.status	closed_access	*
dc.date.updated	2023-07-02T23:03:47Z
pubs.publication-status	Published
pubs.volume	211

Abstract:

Hillslope erosion, including sheet and rill erosion, is the dominant form of erosion in Australia and many parts of the world. Hillslope erosion improvement (HEI) targets are necessary for the evaluation of natural resource condition and sustainable land use and land management practices. The tolerable soil loss concept has been widely applied to agricultural lands for setting soil erosion targets. It is a static target that is difficult to apply to diverse land uses and soil conditions. In this study, we developed a new approach for setting HEI resource condition targets by considering seasonal erosion levels over a large climate gradient and range of land management practices across New South Wales (NSW), Australia. A 20-year fractional vegetation cover and rainfall erosivity time-series have been used to estimate hillslope erosion rates and assign monthly and annual HEI targets across NSW. To assist with land management action target, monthly vegetation cover levels have been set to meet the HEI targets on a pixel-by-pixel (100 m) basis. We further assessed the HEI targets against land and soil capability classes and their spatial and temporal variation across local land service regions. The findings can help identify the locations and periods of time with hillslope erosion exceeding a desirable threshold level and indicate management actions that might be required to improve the soil condition over areas of concern. The processes are fully automated in a geographic information system (GIS) environment, thus providing a useful tool to determine HEI targets for sustainable soil and land management at any location and period. The methods are globally portable as the input datasets are widely available.

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http://hdl.handle.net/10453/171102