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dc.contributor.authorKuha, Jonna
dc.date.accessioned2016-08-02T07:38:48Z
dc.date.available2016-08-02T07:38:48Z
dc.date.issued2016
dc.identifier.isbn978-951-39-6713-0
dc.identifier.otheroai:jykdok.linneanet.fi:1566090
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/50909
dc.description.abstractAutomated water quality monitoring (AWQM) is becoming increasingly common in lakes worldwide. The history of AWQM is relatively short and standard calibration procedures for the measured variables are largely yet to be established. The use of optical AWQM sensors, developed in oceanic environments, raises new questions on the diverse effects which humic compounds may have on the automated optical measurements in inlands waters. The focus of this thesis was to characterize the effects of coloured dissolved organic matter (CDOM) on optical in situ measurements of organic matter (OM) and chlorophyll (Chl) in lakes with varying humic content, and to use AWQM data as a part of traditional monitoring and independently to study current topics in limnology; weather-related episodic events on lake mixing and the effect of hypolimnetic oxygenation (HLO) on the nutrient conditions in a humic lake. The data were collected from AWQM stations on lakes in Finland and Ireland and involved both AWQM and discrete data from open water season. The study on the quality of CDOM revealed that OM fluorometers represented the humic content in water column reliably. However, OM fluorometers did not detect changes in the quality of OM. In situ Chl fluorometer was affected by background OM. The effect was less important when OM remained at constant level. Effects of weather-related episodic events on lake mixing and on Chl-patterns studied with AWQM showed Finnish lakes to face multiple short-lived mixing events during stratified period. The Chl-a content in the lakes varied accordingly. A case study conducted on Jyväsjärvi showed that HLO had a significant effect on the temperature structure of the lake but had little long-term effect on its trophic status
dc.format.extent1 verkkoaineisto (39 sivua, 6 sivua, 4 numeroimatonta sivua)
dc.language.isoeng
dc.publisherUniversity of Jyväskylä
dc.relation.ispartofseriesJyväskylä studies in biological and environmental science
dc.relation.isversionofJulkaistu myös painettuna.
dc.subject.otherautomated monitoring
dc.subject.otherchlorophyll a
dc.subject.othercoloured dissolved organic matter
dc.subject.otherdissolved oxygen
dc.subject.otherepisodic events
dc.subject.otherfluorescence
dc.subject.othertemperature
dc.titleAutomated water quality monitoring of humic lakes by using the optical properties of water
dc.typeDiss.fi
dc.identifier.urnURN:ISBN:978-951-39-6713-0
dc.type.dcmitypeTexten
dc.type.ontasotVäitöskirjafi
dc.type.ontasotDoctoral dissertationen
dc.contributor.tiedekuntaMatemaattis-luonnontieteellinen tiedekuntafi
dc.contributor.tiedekuntaFaculty of Mathematics and Scienceen
dc.contributor.yliopistoUniversity of Jyväskyläen
dc.contributor.yliopistoJyväskylän yliopistofi
dc.contributor.oppiaineAkvaattiset tieteetfi
dc.relation.issn1456-9701
dc.relation.numberinseries319
dc.rights.accesslevelopenAccessfi
dc.subject.ysovedenlaatu
dc.subject.ysomonitorointi
dc.subject.ysooptiset ominaisuudet
dc.subject.ysofluoresenssi
dc.subject.ysomittaus
dc.subject.ysomittauslaitteet
dc.subject.ysoautomaatio
dc.subject.ysojärvet
dc.subject.ysohumusjärvet
dc.subject.ysohumus
dc.subject.ysoorgaaninen aines
dc.subject.ysoklorofylli
dc.subject.ysohappi
dc.subject.ysolämpötila
dc.subject.ysoJyväsjärvi


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