Modelling upland and instream erosion, sediment and phosphorus transport in a large catchment

Autor: Timothy R. Green, Sara Beavis, Anthony Jakeman, Peter F. Crapper, C. R. Dietrich, Li Zhang
Rok vydání: 1999
Předmět:
Zdroj: Hydrological Processes. 13:745-752
ISSN: 1099-1085
0885-6087
DOI: 10.1002/(sici)1099-1085(19990415)13:5<745::aid-hyp777>3.0.co;2-e
Popis: 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 modelling framework described here consists of two major components: an upland catchment model and an instream 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 instream model routes SS and attached P from the outlet of upland catchments to gauging points downstream. The instream 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 associated effects on Q (and hence SS and P) can be assessed. This modelling framework is prototyped on the Namoi Basin in northern New South Wales, Australia, and is described briefly herein.
Databáze: OpenAIRE
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