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United States Department of Agriculture

Agricultural Research Service

Title: Modelling Upland and Instream Erosion, Sediment and Phosphorus Transport Ina Large Catchment

Authors
item Jakeman, Anthony - AUSTRALIAN NATL UNIV
item Green, Timothy
item Beavis, Sara - AUSTRALIAN NATL UNIV
item Zhang, Li - AUSTRALIAN NATL UNIV
item Diebrich, Claude - AUSTRALIAN NATL UNIV
item Crapper, Peter - CSIRO LAND AND WATER

Submitted to: Hydrological Processes
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: August 11, 1998
Publication Date: N/A

Interpretive Summary: This overview presents background information to place the subsequent papers by Beavis et al., Dietrich et al. and Green et al. in the context of a unified approach. The modeling framework described here consists of two major components: an upland catchment model and an in stream sediment transport model. The upland model simulates stream flow (Q), suspended sediment (SS) and associated phosphorus (P) using rainfall data, and is calibrated to daily stream flow time-series under historical conditions. The in stream model routes SS and attached P from the outlet of upland catchments to gauging points downstream. The in stream transport model can infer sources (resuspension and bank erosion) and sinks (deposition) within a reach. Aerial photographs are used to assess the on-site effects of climate and land cover/use on erosion and the drainage network. Changes in land cover/use and the effects on the drainage network are related to the parameters in the rainfall-runoff model so that associate effects on Q (an hence SS and P) can be assessed. This modeling framework is prototyped on the Namois Basin in northern New South Wales, Australia, and is described briefly herein.

Technical Abstract: This overview presents background information to place the subsequent papers by Beavis et al., Dietrich et al. and Green et al. in the context of a unified approach. The modeling framework described here consists of two major components: an upland catchment model and an in stream sediment transport model. The upland model simulates stream flow (Q), suspended sediment (SS) and associated phosphorus (P) using rainfall data, and is calibrated to daily stream flow time-series under historical conditions. The in stream model routes SS and attached P from the outlet of upland catchments to gauging points downstream. The in stream transport model can infer sources (resuspension and bank erosion) and sinks (deposition) within a reach. Aerial photographs are used to assess the on-site effects of climate and land cover/use on erosion and the drainage network. Changes in land cover/use and the effects on the drainage network are related to the parameters in the rainfall-runoff model so that associate effects on Q (an hence SS and P) can be assessed. This modeling framework is prototyped on the Namois Basin in northern New South Wales, Australia, and is described briefly herein.

Last Modified: 4/16/2014
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