Calculating sediment trapping efficiency for reservoirs in series

Waters, D.K., and Lewis, S.E. (2017) Calculating sediment trapping efficiency for reservoirs in series. In: Proceedings of the 22nd International Congress on Modelling and Simulation, Hobart, Tasmania, Australia, 3 to 8 December 2017. pp. 1990-1996. From: MODSIM 2017: 22nd International Congress on Modelling and Simulation, 3-8 December 2017, Hobart, TAS, Australia.

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Abstract

Trapping Efficiency (TE) is defined as the proportion of inflowing sediment that is accumulated in a reservoir. Accurately predicting the trapping efficiency (TE) of sediment in reservoirs is critical to estimate their useful life and inform catchment models for sediment budget estimation. A daily formulation of the Churchill sediment trapping efficiency equation previously implemented in the eWater Source modelling framework, enables the user to account for the accumulation of sediment and hence the subsequent sediment yield exiting a reservoir. Where reservoirs are in series, the particle size of sediment passing through an upstream storage is generally finer than the 'local' sediment. Therefore, the application of the Churchill equation to each reservoir in isolation, not taking into account the different sources of sediment, may result in an under prediction of the sediment yield for a basin. Churchill (1948) proposed a method to account for sediment that had already passed through an upstream reservoir.

Item ID: 53351
Item Type: Conference Item (Research - E1)
Keywords: eWater Source, Churchill, trapping efficiency, sediment yield
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Date Deposited: 01 May 2018 00:16
FoR Codes: 05 ENVIRONMENTAL SCIENCES > 0502 Environmental Science and Management > 050205 Environmental Management @ 100%
SEO Codes: 96 ENVIRONMENT > 9605 Ecosystem Assessment and Management > 960503 Ecosystem Assessment and Management of Coastal and Estuarine Environments @ 100%
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