Water quality time series for Big Melen stream (Turkey): its decomposition analysis and comparison to upstream

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dc.authorid0000-0002-0156-1657en_US
dc.authorid0000-0003-1099-4363en_US
dc.contributor.authorKarakaya, Nusret
dc.contributor.authorEvrendilek, Fatih
dc.date.accessioned2021-06-23T19:26:58Z
dc.date.available2021-06-23T19:26:58Z
dc.date.issued2010
dc.departmentBAİBÜ, Mühendislik Fakültesi, Çevre Mühendisliği Bölümüen_US
dc.description.abstractBig Melen stream is one of the major water resources providing 268 km(3) year (-aEuro parts per thousand 1) of drinking and municipal water for Istanbul. Monthly time series data between 1991 and 2004 for 25 chemical, biological, and physical water properties of Big Melen stream were separated into linear trend, seasonality, and error components using additive decomposition models. Water quality index (WQI) derived from 17 water quality variables were used to compare Aksu upstream and Big Melen downstream water quality. Twenty-six additive decomposition models of water quality time series data including WQI had R (2) values ranging from 88% for log(water temperature) (P a parts per thousand currency signaEuro parts per thousand 0.001) to 3% for log(total dissolved solids) (P a parts per thousand currency signaEuro parts per thousand 0.026). Linear trend models revealed that total hardness, calcium concentration, and log(nitrite concentration) had the highest rate of increase over time. Tukey's multiple comparison pointed to significant decreases in 17 water quality variables including WQI of Big Melen downstream relative to those of Aksu upstream (P a parts per thousand currency signaEuro parts per thousand 0.001). Monitoring changes in water quality on the basis of watersheds through WQI and decomposition analysis of time series data paves the way for an adaptive management process of water resources that can be tailored in response to effectiveness and dynamics of management practices.en_US
dc.identifier.doi10.1007/s10661-009-0932-7
dc.identifier.endpage136en_US
dc.identifier.issn0167-6369
dc.identifier.issn1573-2959
dc.identifier.issue1-4en_US
dc.identifier.pmid19444637en_US
dc.identifier.scopus2-s2.0-77952289727en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage125en_US
dc.identifier.urihttps://doi.org/10.1007/s10661-009-0932-7
dc.identifier.urihttps://hdl.handle.net/20.500.12491/6699
dc.identifier.volume165en_US
dc.identifier.wosWOS:000277371000011en_US
dc.identifier.wosqualityQ3en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakPubMeden_US
dc.institutionauthorKarakaya, Nusret
dc.institutionauthorEvrendilek, Fatih
dc.language.isoenen_US
dc.publisherSpringeren_US
dc.relation.ispartofEnvironmental Monitoring And Assessmenten_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectDecomposition Analysisen_US
dc.subjectMonitoringen_US
dc.subjectTime Seriesen_US
dc.subjectWater Quality Indexen_US
dc.titleWater quality time series for Big Melen stream (Turkey): its decomposition analysis and comparison to upstreamen_US
dc.typeArticleen_US

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