Grazing land use is the dominant contributing land use of TSS in the BBB . Across the whole BBB , it is predicted that gully erosion is the dominant erosion source ( 65 %), followed by hillslope ( 27 %) and streambank ( 8 %) erosion . These proportions vary between sub catchments , but gully erosion is the dominant sediment source , except in the Broken River sub catchment where hillslope erosion dominates ( 65 %).
Figure 15 . Estimated BBB sub catchment contributions ( modelled 2013 baseline ). Reproduced from Waterhouse et al . ( 2016 ).
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