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Modelling erosion and sediment delivery from unsealed roads in southeast Australia

Author

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  • Fu, B.
  • Newham, L.T.H.
  • Field, J.B.

Abstract

Unsealed roads and tracks are potentially significant sources of diffuse pollutants, particularly sediment. This paper describes the application and development of a road erosion and sediment transport model in the Moruya-Deua and Tuross River catchments of southeast Australia. An empirical model based on the Washington Road Surface Erosion Model (WARSEM) is applied using typically widely available spatial data sets and field-collected data. The results suggest that approximately 21kt and 35kt of sediment respectively are produced annually from road erosion in the Moruya-Deua and Tuross River catchments, but that less than 10% of the sediment is delivered to streams. Surprisingly, about half of the delivered sediment is derived from only 4% of the total road network. Testing of the model shows that the model outputs are likely to overestimate road erosion rates. To address this problem, catchment-specific testing of the factors of the model and improving knowledge of the processes of road to stream sediment transport are required.

Suggested Citation

  • Fu, B. & Newham, L.T.H. & Field, J.B., 2009. "Modelling erosion and sediment delivery from unsealed roads in southeast Australia," Mathematics and Computers in Simulation (MATCOM), Elsevier, vol. 79(9), pages 2679-2688.
    • Handle: RePEc:eee:matcom:v:79:y:2009:i:9:p:2679-2688
    DOI: 10.1016/j.matcom.2008.10.001
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    Cited by:

    1. P. Dalir & R. Naghdi & V. Gholami, 2014. "Modelling of forest road sediment in the northern forest of Iran (Lomir Watershed)," Journal of Forest Science, Czech Academy of Agricultural Sciences, vol. 60(3), pages 109-114.

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