DOI: 10.1016/j.foreco.2013.04.032
Scopus记录号: 2-s2.0-84878132361
论文题名: Estimating catchment-scale annual soil loss in managed native eucalypt forests, Australia
作者: Jamshidi R. ; Dragovich D. ; Webb A.A.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 304 起始页码: 20
结束页码: 32
语种: 英语
英文关键词: Australia
; Forest management
; Raster data layers
; RUSLE
; Soil erosion estimation
; Spatial variability
Scopus关键词: Australia
; Raster data
; RUSLE
; Soil erosion
; Spatial variability
; Catchments
; Erosion
; Estimation
; Geographic information systems
; Hazards
; Rain
; Runoff
; Sediment transport
; Slope stability
; Soil conservation
; Soils
; Water conservation
; Water resources
; Forestry
; best management practice
; catchment
; erosion rate
; erosivity
; evergreen forest
; forest management
; forest soil
; hillslope
; precipitation (climatology)
; raster
; regolith
; Revised Universal Soil Loss Equation
; selective logging
; soil conservation
; soil erosion
; spatial variation
; sustainable development
; water resource
; Australia
; Erosion
; Forest Management
; Forestry
; GIS
; Hazards
; Rain
; Runoff
; Soil
; Water Management
; Water Resources
; Australia
; New South Wales
英文摘要: Conservation of soil and water resources is one of the key criteria underpinning sustainable forest management. While soil and water resources are important determinants of forest productivity, without appropriate assessment of soil erosion risk and the application of best management practices (BMPs), some forest management activities can adversely affect hillslope erosion rates with detrimental consequences for aquatic environments and downstream water users. In the multiple-use native eucalypt forests of New South Wales (NSW), Australia, hazard matrix tables are currently used to identify soil erosion risk based upon rainfall erosivity, soil regolith stability and slope classes at the compartment scale prior to undertaking forestry activities. Resultant "inherent hazard levels" (IHLs) direct the BMPs to be used, such as riparian buffer widths, during harvesting and roading operations. The IHL model, being an ordinal classification system, only provides a relative indication of erosion potential without any quantitative estimate of possible post-harvest erosion rates. To potentially better identify erosion risk and quantify likely soil erosion under a range of forest management and climatic scenarios at the hillslope and/or catchment scale, in this paper we utilised an alternative approach by modelling soil erosion using the empirically-derived Revised Universal Soil Loss Equation in combination with a GIS-based spatially distributed raster analysis. In four case study catchments in Kangaroo River State forest, two of which were subjected to single-tree selection harvesting operations, mean annual changes in soil loss were estimated at a grid cell level. Potential differences in soil loss estimates were assessed before, during and after selective logging. Vegetation cover and soil samples were recorded in a 500 × 1000 m rectangular network laid out across the catchments. Slope gradient was found to contribute substantially to the spatial variability of soil loss estimation across the catchments. However, between-year differences demonstrate that the highest estimated annual rates of soil loss occurred on steep hillslopes when high levels of rainfall were recorded, while the values on those same areas remained considerably lower during low rainfall periods. The major effect of the rainfall component in generating soil erosion overshadows the modest impacts of selective logging operations. © 2013 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66494
Appears in Collections: 影响、适应和脆弱性
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作者单位: School of Geosciences F09, University of Sydney, NSW 2006, Australia; Forestry Corporation of NSW, PO Box 4019, Coffs Harbour Jetty, NSW 2450, Australia; Australian Centre for Agriculture and Law, University of New England, NSW 2351, Australia
Recommended Citation:
Jamshidi R.,Dragovich D.,Webb A.A.. Estimating catchment-scale annual soil loss in managed native eucalypt forests, Australia[J]. Forest Ecology and Management,2013-01-01,304