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Runoff Generation

Runoff Generation. Brian Finlayson School of Anthropology, Geography and Environmental Studies The University of Melbourne. Premises There is significant locational specificity in runoff generation and delivery.

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Runoff Generation

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  1. Runoff Generation Brian Finlayson School of Anthropology, Geography and Environmental Studies The University of Melbourne

  2. Premises • There is significant locational specificity in runoff generation and delivery. • Much of what we know comes from small (usually experimental) catchments in steep and humid environments • The bulk of the agricultural and grazing lands in Australia’s major river basins are characterised by flat topography and sub-humid to semi-arid climates

  3. The major issue in relation to runoff generation in these catchments concerns the generation and transmission of surface runoff • There are two components to this: • How and where surface runoff is generated • How and where that runoff makes its way into and through the drainage network

  4. Krui River Headwaters

  5. Merriwa River

  6. Mooki River

  7. Comet River

  8. Comet River

  9. Comet River

  10. Comet River • Channel connectivity

  11. Comet River

  12. Summary of catchment characteristics Catchment Area Av Slope (˚) % Well Connected Brown River 1222 5.9 9.4 Corella Ck 144 1.7 1.0 Moolayember Ck 617 15.3 21.6

  13. Comet River

  14. Summary • Where and how is surface runoff generated? • Soil properties (surface sealing, depth, permeability etc) • Topography (slope, contour concavity, water surfaces, bedrock outcrops) • Land use (grazing, cultivation, irrigation)

  15. Summary • Where and how does it join the channel network? • Slope-channel coupling • Non-channel topographic networks

  16. Summary • How does the channel network deliver water and entrained sediment through the catchment? • Channel network continuity • Internal storage basins

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