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Opportunities for combining data of Estonian and Russian monitoring to reflect on water quality in large transboundary Lake Peipsi

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dc.contributor.authorTammeorg, Olga
dc.contributor.authorTuvikene, Lea
dc.contributor.authorKondratyev, Sergey
dc.contributor.authorGolosov, Sergey
dc.contributor.authorZverev, Ilya
dc.contributor.authorZadonskaya, Olga
dc.contributor.authorNõges, Peeter
dc.date.accessioned2022-09-28T07:56:17Z
dc.date.available2022-09-28T07:56:17Z
dc.date.issued2022
dc.description.abstractLake Peipsi, one of the world’s largest lakes, is shared between Estonia and Russia. The water quality in different parts of the lake has so far been assessed independently. Here we explore opportunities for combining data of Estonian and Russian monitoring. For that, we 1) analysed the compatibility of data for some water quality variables; 2) estimated the potential effects of the differences in sampling frequency; 3) provided a few regression models to calculate the missing data for months not sampled by the Russian side. Data of the concurrent Estonian and Russian sampling indicated a good compatibility. Estonian data analysis suggested that water quality assessment results are sensitive to sampling frequency. For example, total phosphorus (TP) in the largest basin showed a long-term decreasing trend in three month data that disappeared when data for other months were added. Disregarding some months may lead to underor overestimation of certain factors with no consistency in the response of different basins. Hence, data of the whole ice-free period are recommended for an adequate water quality assessment. Furthermore, we demonstrated that monthly values of the water quality variables of the same year are autocorrelated. Based on this, we filled the gaps in the long-term data and compiled a dataset for the whole lake that enables its most comprehensive use in water quality assessment and management. Long-term data revealed no water quality improvement of Lake Peipsi. Further reduction of the external nutrient load is needed. Eutrophication is sustained by high internal phosphorus load.eng
dc.description.abstractThe study has received funding from the Estonian Research Council grants PRG1167 and PRG709, European Union’s Horizon 2020 research and innovation programme under grant agreement No 951963, and grant No 0154-2019-0001 of the Russian Academy of Sciences.eng
dc.description.sponsorshipThe study has received funding from the Estonian Research Council grants PRG1167 and PRG709, European Union’s Horizon 2020 research and innovation programme under grant agreement No 951963, and grant No 0154-2019-0001 of the Russian Academy of Sciences.eng
dc.identifier.issn0380-1330
dc.identifier.publicationJournal of Great Lakes Research, 48, (2022), 961–970eng
dc.identifier.urihttp://hdl.handle.net/10492/7791
dc.identifier.urihttps://doi.org/10.1016/j.jglr.2022.05.009
dc.publisherElsevier
dc.relationinfo:eu-repo/grantAgreement/EC/H2020/951963/EU/TREICLAKEeng
dc.rightsCreative Commons Attribution 4.0 International (CC BY 4.0)eng
dc.rights© 2022 The Authors.eng
dc.rightsinfo:eu-repo/semantics/openAccesseng
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/eng
dc.subjectLake Peipsieng
dc.subjecttransboundaryeng
dc.subjectmonitoringeng
dc.subjectlake water quality assessmenteng
dc.subjectfilling gapseng
dc.subjectarticleseng
dc.titleOpportunities for combining data of Estonian and Russian monitoring to reflect on water quality in large transboundary Lake Peipsieng
dc.typeinfo:eu-repo/semantics/articleeng

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