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• W4310011069 startingPage "160452" @default.
• W4310011069 abstract "Suspended fine sediment has a significant impact on freshwater quality variables such as visual clarity (VC). However, freshwater quality is related to the attributes of the catchment sources contributing fine sediment to the stream network. Here, the extent to which an array of sources defined spatially according to erosion process and geological parent material may be discriminated and classified based on sediment-related water quality (SRWQ) attributes that potentially affect VC was examined. Erosion sources were sampled across two New Zealand catchments representing six types of erosion and eight parent materials. Erosion source measurements focused on particle size, organic matter content, and light beam attenuation (which is convertible to VC). The source data were analysed to: 1) evaluate source variability using a combination of Kruskal-Wallis and principal component analysis; 2) reclassify sources using a Random Forest model; and 3) demonstrate how erosion source affects VC for a range of theoretical sediment concentrations (SC) using a simple empirical model. The results indicate that SRWQ attributes show significant variation across erosion sources. The extent to which attributes differed between sources often related to whether there was a strong association between a specific erosion process and parent material. The 19 a priori source classifications were reduced to 5 distinct sources that combined erosion process and parent material (i.e., bank erosion–alluvium; mass movement–ancient volcanics; mass movement–sedimentary; surficial erosion; gully–unconsolidated sandstone). At low SC, the impact of erosion source on VC became most evident ranging from 2.6 to 5.6 m at SC of 5 g m−3. These findings show how catchment sources of sediment, in addition to sediment concentration, influence VC, and highlight the need to consider quality as well as quantity of material supplied to stream networks when planning erosion control." @default.
• W4310011069 created "2022-11-30" @default.
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• W4310011069 date "2023-02-01" @default.
• W4310011069 modified "2023-10-01" @default.
• W4310011069 title "The influence of erosion sources on sediment-related water quality attributes" @default.
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• W4310011069 doi "https://doi.org/10.1016/j.scitotenv.2022.160452" @default.
• W4310011069 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36436635" @default.
• W4310011069 hasPublicationYear "2023" @default.
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