Long-term watershed management is an effective strategy to reduce organic matter export and disinfection by-product precursors in source water

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dc.contributor.authorMajidzadeh, Hameden
dc.contributor.authorChen, Huanen
dc.contributor.authorCoates, T. Adamen
dc.contributor.authorTsai, Kuo-Peien
dc.contributor.authorOlivares, Christopher I.en
dc.contributor.authorTrettin, Carl C.en
dc.contributor.authorUzun, Habibullahen
dc.contributor.authorKaranfil, Tanjuen
dc.contributor.authorChow, Alex T.en
dc.contributor.departmentForest Resources and Environmental Conservationen
dc.date.accessioned2020-03-06T17:56:59Zen
dc.date.available2020-03-06T17:56:59Zen
dc.date.issued2019-09-18en
dc.description.abstractWatershed management practices such as prescribed fire, harvesting and understory mastication can alter the chemical composition and thickness of forest detritus, thus affecting the quantity and quality of riverine dissolved organic matter (DOM). Long-term effects of watershed management on DOM composition were examined through parallel field and extraction-based laboratory studies. The laboratory study was conducted using detritus samples collected from a pair of managed and unmanaged watersheds in South Carolina, USA. Results showed that dissolved organic carbon (DOC), total dissolved nitrogen (TDN) and ammonium (NH4+-N) concentrations were higher in water extracts from the unmanaged watershed than from the managed watershed (P < 0.01). Pyrolysis gas chromatography-mass spectrometry analysis showed that water extracts from the unmanaged watershed contained more aromatic compounds than extracts from the managed watershed. For the field study, monthly water samples were collected for 1 year (2015) from the paired watersheds. DOC and TDN concentrations, as well as DOM aromaticity, were significantly higher in the unmanaged watershed than in the managed watershed for most of the year (P < 0.05) and were linked to detrital thickness, precipitation and flow patterns. The formation potential of two regulated disinfection by-products was lower in the unmanaged watershed for most of 2015 (P < 0.05). From this study, it appears that long-term watershed management practices may alter detrital mass and chemistry in ways that improve water quality.en
dc.description.adminPublic domain – authored by a U.S. government employeeen
dc.description.notesWe are grateful for financial support from the Joint Fire Science Program (Project 14-1-06-19), USEPA (R835864) and the USDA Forest Service National Fire Plan (2014-18). We also thank Mary-Frances Wolf, Ryan Marsh, Rob O'Neal, David Miller, Jennie Untener and Brian Williams for their assistance with fieldwork and sample collection.en
dc.description.sponsorshipJoint Fire Science Program [14-1-06-19]; USEPAUnited States Environmental Protection Agency [R835864]; USDA Forest Service National Fire Plan (2014-18)en
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1071/WF18174en
dc.identifier.eissn1448-5516en
dc.identifier.issn1049-8001en
dc.identifier.issue10en
dc.identifier.urihttp://hdl.handle.net/10919/97231en
dc.identifier.volume28en
dc.language.isoenen
dc.rightsCreative Commons CC0 1.0 Universal Public Domain Dedicationen
dc.rights.urihttp://creativecommons.org/publicdomain/zero/1.0/en
dc.subjectcarbonen
dc.subjectforest managementen
dc.subjectfuelsen
dc.subjectharvestingen
dc.subjectmasticationen
dc.subjectprescribed fireen
dc.subjectWater qualityen
dc.titleLong-term watershed management is an effective strategy to reduce organic matter export and disinfection by-product precursors in source wateren
dc.title.serialInternational Journal of Wildland Fireen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.dcmitypeStillImageen

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