Spatio-Temporal Dynamics of Algae and Macrophyte Cover in Urban Lakes: A Remote Sensing Analysis of Bellandur and Varthur Wetlands in Bengaluru, India

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dc.date.accessioned2020-12-23T07:58:56Z
dc.date.available2020-12-23T07:58:56Z
dc.date.issued2020-11-23
dc.description.sponsorshipGefördert durch den Publikationsfonds der Universität Kasselger
dc.identifierdoi:10.17170/kobra-202012222888
dc.identifier.urihttp://hdl.handle.net/123456789/12366
dc.language.isoengeng
dc.relation.doidoi:10.3390/rs12223843
dc.rightsNamensnennung 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectecosystem serviceeng
dc.subjectGoogle Earth imageseng
dc.subjectlake eutrophicationeng
dc.subjectlake surface covereng
dc.subjectsupervised classificationeng
dc.subjecturban wetlandseng
dc.subjectwaste water dischargeeng
dc.subject.ddc550
dc.subject.ddc710
dc.subject.swdIndienger
dc.subject.swdÖkosystemdienstleistungger
dc.subject.swdGoogle Earthger
dc.subject.swdEutrophierungger
dc.subject.swdSeeger
dc.subject.swdWasseroberflächeger
dc.subject.swdVerstädterungger
dc.subject.swdFeuchtgebietger
dc.subject.swdAbwassereinleitungger
dc.titleSpatio-Temporal Dynamics of Algae and Macrophyte Cover in Urban Lakes: A Remote Sensing Analysis of Bellandur and Varthur Wetlands in Bengaluru, Indiaeng
dc.typeAufsatz
dc.type.versionpublishedVersion
dcterms.abstractRapid urbanization processes and indiscriminate disposal of urban wastewaters are major causes for anthropogenic lake-sediment deposition and eutrophication. However, information about the spatial and temporal variation of macrophyte and phytoplankton distribution as indicators for water contamination is limited. To gain insights into the dynamics, we analyzed lake-cover changes of Bellandur and Varthur Lake in the S-Indian megacity of Bengaluru for the post-rainy seasons of the years 2002–2019. Supervised maximum likelihood classifications were conducted on 62 freely available, true-color satellite images in order to distinguish between macrophytes, algae, and free water surface. The image-derived results were verified by supervised classification and manual mapping of two simultaneously recorded multispectral satellite images (Sentinel-2 and WorldView-2). Seasonal interrelations between macrophytes and algae distribution were similar for both lakes. The increase in macrophyte cover during post-rainy season negatively correlated with algal abundance. Macrophyte expansion progressively suppressed algae development at both lakes, reflective of increasing eutrophication caused by on-going wastewater input. Seasonal variation in precipitation, wind direction, and temperature seemed to trigger intra-annual shifts of macrophytes and algae while similar macrophyte spread intensities during the post-monsoon season indicated independence of nutrient loads in the lake water.eng
dcterms.accessRightsopen access
dcterms.creatorBareuther, Mischa
dcterms.creatorKlinge, Michael
dcterms.creatorBürkert, Andreas
dcterms.source.articlenumber3843
dcterms.source.identifierEISSN 2072-4292
dcterms.source.issueIssue 22
dcterms.source.journalRemote Sensingeng
dcterms.source.volumeVolume 12
kup.iskupfalse

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