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- W4293529587 abstract "The assessment of water quality across space and time is of considerable interest for both agricultural and public health reasons. The standard method to assess the water quality of a catchment, or a group of catchments, usually involves collecting point measurements of water quality and other additional information such as the date and time of measurements, rainfall amounts, the land-use and soil-type of the catchment and the elevation. Some of this auxiliary information will be point data, measured at the exact location, whereas other such as land-use will be areal data often in a compositional format. Two problems arise if analysts try to incorporate this information into a statistical model in order to predict (for example) the influence of land-use on water quality. First is the spatial change of support problem that arises when using areal data to predict outcomes at point locations. Secondly, the physical process driving water quality is not compositional, rather it is the observation process that provides compositional data. In this paper we present an approach that accounts for these two issues by using a latent variable to identify the land-use that most likely influences water quality. This latent variable is used in a spatial mixture model to help estimate the influence of land-use on water quality. We demonstrate the potential of this approach with data from a water quality research study in the Mount Lofty range, in South Australia." @default.
- W4293529587 created "2022-08-30" @default.
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- W4293529587 date "2017-02-26" @default.
- W4293529587 modified "2023-09-23" @default.
- W4293529587 title "A mixture model approach to infer land-use influence on point referenced water quality" @default.
- W4293529587 doi "https://doi.org/10.48550/arxiv.1702.08140" @default.
- W4293529587 hasPublicationYear "2017" @default.
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