A deconvolutional Bayesian mixing model approach for river basin sediment source apportionment

Scientific Reports
William H BlakeBrice X Semmens

Abstract

Increasing complexity in human-environment interactions at multiple watershed scales presents major challenges to sediment source apportionment data acquisition and analysis. Herein, we present a step-change in the application of Bayesian mixing models: Deconvolutional-MixSIAR (D-MIXSIAR) to underpin sustainable management of soil and sediment. This new mixing model approach allows users to directly account for the 'structural hierarchy' of a river basin in terms of sub-watershed distribution. It works by deconvoluting apportionment data derived for multiple nodes along the stream-river network where sources are stratified by sub-watershed. Source and mixture samples were collected from two watersheds that represented (i) a longitudinal mixed agricultural watershed in the south west of England which had a distinct upper and lower zone related to topography and (ii) a distributed mixed agricultural and forested watershed in the mid-hills of Nepal with two distinct sub-watersheds. In the former, geochemical fingerprints were based upon weathering profiles and anthropogenic soil amendments. In the latter compound-specific stable isotope markers based on soil vegetation cover were applied. Mixing model posterior distributions of pr...Continue Reading

References

Nov 22, 2007·The Science of the Total Environment·Generose Nziguheba, Erik Smolders
Feb 26, 2008·Ecology Letters·Jonathan W Moore, Brice X Semmens
May 11, 2013·Journal of Environmental Management·David J GilvearRoser Casas-Mulet
Jan 23, 2014·Environmental Science & Technology·Richard A FrankL Mark Hewitt
Oct 21, 2014·Environmental Science & Technology·N R WarnerA Vengosh
Jun 5, 2015·Environmental Science & Technology·Daren C GooddyBen W J Surridge
Nov 20, 2016·Ecology·Brian C Stock, Brice X Semmens

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Citations

Sep 11, 2020·Scientific Reports·Jaqueline Stenfert KroeseMariana C Rufino
Nov 27, 2020·Journal of Soils and Sediments·Adrian L CollinsYusheng Zhang
Jun 20, 2021·The Science of the Total Environment·Xiaolei WangGeoffrey Millward

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Methods Mentioned

BETA
X-Ray

Software Mentioned

Deconvolutional MixSIAR
Pooled
R
MixSIAR
Exploratory Data Analysis EDA

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