Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/12453
Title: A two-step up-scaling method for mapping runoff and sediment production from pasture and woody encroachment on semi-arid hillslopes
Contributor(s): Munoz-Robles, Carlos (author); Tighe, Matthew  (author); Reid, Nick  (author)orcid ; Frazier, Paul  (author); Briggs, Sue V (author); Wilson, Brian  (author)orcid 
Publication Date: 2013
DOI: 10.1002/eco.283
Handle Link: https://hdl.handle.net/1959.11/12453
Abstract: Management of woody encroachment and pasture to reduce runoff and sediment production is important in semi-arid areas. However, the study of relationships between vegetation and surface hydrology at hillslope scale is difficult because of cost and time constraints. Up-scaling eco-hydrological responses measured at fine scale can overcome these constraints and provide insights into runoff and erosion at scales relevant to management. In this study, runoff and sediment production were modelled on two adjacent hillslopes, one with woody encroachment (3500 stems ha⁻¹) and the other a volunteer pasture cultivated to oats 18 months previously. Spatial modelling was undertaken to integrate small-plot (1 m²) rainfall simulation, slope and the spatial distribution of ground cover. The estimates of runoff and sediment production in the woody hillslope were considerably lower than in the pasture hillslope in both years of the study. Runoff and sediment production in the woody hillslope were similar in consecutive years, whereas the estimates of runoff and sediment production in the pasture hillslope were lower in the second year as a result of the establishment of a water spreading system of contour banks. The results showed the importance of measuring patchiness and connectivity of runoff source areas for runoff and sediment production. The spatial modelling approach allowed a description of fine-scale, surface eco-hydrological interactions on hillslopes, based on high resolution spatial data and experimental fine-scale rainfall simulations. A similar modelling approach could be used to explore runoff and sediment production resulting from varying management of semi-arid lands.
Publication Type: Journal Article
Source of Publication: Ecohydrology, 6(1), p. 83-93
Publisher: John Wiley & Sons Ltd
Place of Publication: United Kingdom
ISSN: 1936-0592
1936-0584
Fields of Research (FoR) 2008: 050305 Soil Physics
050302 Land Capability and Soil Degradation
040607 Surface Processes
Fields of Research (FoR) 2020: 410602 Pedology and pedometrics
410601 Land capability and soil productivity
370901 Geomorphology and earth surface processes
Socio-Economic Objective (SEO) 2008: 961406 Sparseland, Permanent Grassland and Arid Zone Soils
961207 Rehabilitation of Degraded Sparseland, Permanent Grassland and Arid Zone Environments
960910 Sparseland, Permanent Grassland and Arid Zone Land and Water Management
Socio-Economic Objective (SEO) 2020: 180605 Soils
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
Appears in Collections:Journal Article

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