dc.contributor.author | Harvey, E. Therese | |
dc.contributor.author | Sørensen, Kai | |
dc.date.accessioned | 2024-02-07T08:09:39Z | |
dc.date.available | 2024-02-07T08:09:39Z | |
dc.date.created | 2024-02-06T13:31:17Z | |
dc.date.issued | 2021 | |
dc.identifier.isbn | 978-82-577-7395-3 | |
dc.identifier.issn | 1894-7948 | |
dc.identifier.uri | https://hdl.handle.net/11250/3116055 | |
dc.description | Prosjektleder: Therese Harvey | en_US |
dc.description.abstract | Sentinel 2 & 3 data for 2016 to 2020 were processed with C2RCC processor for six lakes in the ØKOSTOR monitoring program: Mjøsa, Selbusjøen, Gjende, Røssvatnet, Snåsavatnet and Femunden. In this report we have taken steps towards an operational remote sensing (RS) service for Norwegian lakes. Maps of multi-year chlorophyll-a concentrations (chl-a) were produced. Chl-a status classification based on RS was assessed and compared with the status based on in-situ sampling. The chl-a satellite data was variable over month, year and for an assessment period of 4-5 years It worked well for some lakes but overestimations of the chl-a retrieval can most likely be improved by the use of other algorithms or by finding a more correct conversions factor between chl-a concentration and chl-a absorption. The amount of data for each lake increases with satellite observations, on average 15 observations per year (Sentinel 2) and 19 (Sentinel 3), compared to 4-6/year or every 4th year with in-situ observations. RS can provide new knowledge of spatial and temporal dynamics and is thus a good complement to ordinary sampling for water quality classifications of Norwegian lakes, but it needs more in-depth work for possible adjustments and corrections. | en_US |
dc.description.sponsorship | Norwegian Environment Agency (Miljødirektoratet) | en_US |
dc.language.iso | eng | en_US |
dc.publisher | Norsk institutt for vannforskning | en_US |
dc.relation.ispartof | NIVA-rapport | |
dc.relation.ispartofseries | NIVA-rapport;7659-2021 | |
dc.relation.ispartofseries | Miljødirektoratet-rapport;M-2118 | |
dc.subject | Overvåking | en_US |
dc.subject | Monitoring | en_US |
dc.subject | Vannkvalitet | en_US |
dc.subject | Water quality | en_US |
dc.subject | Innsjøer | en_US |
dc.subject | Lakes | en_US |
dc.subject | Fjernmåling | en_US |
dc.subject | Remote sensing | en_US |
dc.title | Steps towards a status classification of Norwegian lakes using satellite data - method development and case studies | en_US |
dc.type | Research report | en_US |
dc.description.version | publishedVersion | en_US |
dc.rights.holder | © Norwegian Institute for Water Research and the Norwegian Environment Agency. The publication can be cited freely if the source is stated. | en_US |
dc.subject.nsi | VDP::Matematikk og naturvitenskap: 400 | en_US |
dc.subject.nsi | VDP::Mathematics and natural scienses: 400 | en_US |
dc.source.pagenumber | 42 | en_US |
dc.source.issue | 7659-2021 | en_US |
dc.identifier.cristin | 2243687 | |
cristin.ispublished | true | |
cristin.fulltext | original | |