Arid
DOI10.1016/j.geomorph.2016.05.009
Timing and causes of gully erosion in the riparian zone of the semi-arid tropical Victoria River, Australia: Management implications
McCloskey, G. L.1,3; Wasson, R. J.2,3; Boggs, G. S.3,4; Douglas, M.3,5
通讯作者McCloskey, G. L.
来源期刊GEOMORPHOLOGY
ISSN0169-555X
EISSN1872-695X
出版年2016
卷号266页码:96-104
英文摘要

Gully erosion in the seasonally wet tropics of Australia is a major source of sediment in rivers. Stabilization of gullies to reduce impacts on aquatic ecosystems and water storages is a focus for management. However, the cause of the gully erosion is poorly understood and so a critical context for soil conservation is missing. It is uncertain if they are the result of post-European cattle grazing or are they much older and related to non-human factors. The causes of riparian gully erosion along a reach of the Victoria River in the semi-arid tropics of Australia were investigated using several methods. Gully complexes were described and characterised by two major components: a Flood Drainage Channel (FDC) and upslope of this an Outer Erosion Feature (OEF) characterised by badlands set within an amphitheatre. The OEF is likely to be a major source of sediment that appears to be of recent origin. A review of historical records, combined with Optically Stimulated Luminescence (OSL) dating, showed that the FDCs were well established prior to the introduction of domestic stock. It also showed that the badlands began to develop about 90 years ago; that is, about 40 years after the arrival of domestic stock. In addition, an analysis of aerial photos coupled with an on-ground survey and analysis of fallout radionuclides revealed that erosion processes are still active within the gully complexes. While the FDCs are natural drainage channels, cattle grazing probably triggered the badland formation, with the expansion aided by increased rainfall in the past 40 years. Therefore, the OEFs are of human origin and protection from grazing of the riparian zone should slow badland erosion and reduce sediment input to the river. (C) 2016 Elsevier B.V. All rights reserved.


英文关键词Victoria River Gully erosion Age of gullies Land use Optically stimulated luminescence (OSL) Caesium-137
类型Article
语种英语
国家Australia ; Singapore
收录类别SCI-E
WOS记录号WOS:000378665000009
WOS关键词SOUTHEASTERN AUSTRALIA ; EUROPEAN SETTLEMENT ; SEDIMENT ; CATCHMENT ; QUEENSLAND ; INITIATION ; EVOLUTION ; FLUX
WOS类目Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向Physical Geography ; Geology
来源机构University of Western Australia
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/193250
作者单位1.Dept Nat Resources & Mines, POB 937, Cairns, Qld 4870, Australia;
2.Natl Univ Singapore, Lee Kuan Yew Sch Publ Policy, Inst Water Policy, Singapore 117548, Singapore;
3.Charles Darwin Univ, Darwin, NT 0909, Australia;
4.Wheatbelt NRM, Northam, WA 6401, Australia;
5.Univ Western Australia, Sch Earth & Environm, Perth, WA 6009, Australia
推荐引用方式
GB/T 7714
McCloskey, G. L.,Wasson, R. J.,Boggs, G. S.,et al. Timing and causes of gully erosion in the riparian zone of the semi-arid tropical Victoria River, Australia: Management implications[J]. University of Western Australia,2016,266:96-104.
APA McCloskey, G. L.,Wasson, R. J.,Boggs, G. S.,&Douglas, M..(2016).Timing and causes of gully erosion in the riparian zone of the semi-arid tropical Victoria River, Australia: Management implications.GEOMORPHOLOGY,266,96-104.
MLA McCloskey, G. L.,et al."Timing and causes of gully erosion in the riparian zone of the semi-arid tropical Victoria River, Australia: Management implications".GEOMORPHOLOGY 266(2016):96-104.
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