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[{"key": "dc.contributor.advisor", "value": "Ihaksi, Taina", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.advisor", "value": "V\u00e4h\u00e4talo, Anssi", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.advisor", "value": "Lensu, Anssi", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.advisor", "value": "Ahonen, Salla", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Valjakka, Venla", "language": "", "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2023-05-25T06:14:31Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2023-05-25T06:14:31Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2023", "language": "", "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/87183", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Viime vuosikymmenten aikana pohjoisen pallonpuoliskon pintavesiss\u00e4 on ollut \nhavaittavissa tummumista. Tummuminen johtuu lis\u00e4\u00e4ntyneest\u00e4 orgaanisen \naineksen ja -hiilen kuormituksesta. Veden v\u00e4rin kasvu kantaa juurensa \nteollisuuden ilmansaasteiden kontrollointiin ja hapanlaskeuman v\u00e4hentymiseen. \nIlmastonmuutoksen on my\u00f6s tunnistettu olevan nousevien v\u00e4rilukutrendien \ntaustalla kasvaneiden l\u00e4mp\u00f6tilojen ja lis\u00e4\u00e4ntyneen sadannan sek\u00e4 valunnan takia. \nViime aikoina my\u00f6s valuma-alueen maank\u00e4yt\u00f6n ja ominaisuuksien on havaittu \nvaikuttavan vesist\u00f6jen tummumiseen. Erityisesti ojituksen, etenkin turvemailla, \nja muiden mets\u00e4talouden toimenpiteiden on tunnistettu lis\u00e4\u00e4v\u00e4n vesist\u00f6jen \nhumuskuormaa ja siten veden v\u00e4ri\u00e4. Vesist\u00f6jen tummumisella on haitallisia \nvaikutuksia pintavesien tilaan, vesiekosysteemeihin sek\u00e4 juomaveden \npuhdistukseen. T\u00e4ss\u00e4 tutkielmassa tarkasteltiin valuma-alueen maank\u00e4yt\u00f6n ja \nominaisuuksien vaikutusta j\u00e4rvien tummumiseen 24 j\u00e4rven valuma-alueella. \nTutkielmassa tarkasteltiin veden v\u00e4riluvun (mg/l Pt) trendi\u00e4 vuosien 1990\u20132022 \nv\u00e4lill\u00e4 sek\u00e4 tehtiin paikkatietoanalyysej\u00e4, joissa tarkasteltiin valuma-alueen \nkokoa, vesialaa, mets\u00e4alaa, peltoalaa, ojitusintensiteetti\u00e4, mets\u00e4n ik\u00e4\u00e4 \ntapahtuneiden hakkuiden mittarina, metsien kuusipuuvaltaisuutta, turvemaita \nsek\u00e4 pohjavesialueita. Paikkatietoanalyysien tuloksia tarkasteltiin suhteessa \nveden v\u00e4rin muutokseen ja lis\u00e4ksi tarkasteltiin eroja tummuneiden ja \ntummumattomien j\u00e4rvien valuma-alueiden v\u00e4lill\u00e4. Tutkielmassa huomattiin \npienen vesialan omaavien valuma-alueiden j\u00e4rvien tummuvan voimakkaammin. \nTutkimuksessa havaittiin my\u00f6s turvemaiden ja suuremman ojitusintensiteetin \nvoimistavan j\u00e4rvien tummumista. Tutkimuksessa havaittiin tummuneiden \nj\u00e4rvien valuma-alueilla tapahtuneen enemm\u00e4n hakkuita, kuin tummumattomien \nj\u00e4rvien valuma-alueilla. Tulokset vahvistivat aiemmassa tutkimuksessa tehtyj\u00e4 \nhavaintoja ja her\u00e4tt\u00e4v\u00e4t huolta pintavesien tilasta ja nostavat kysymyksi\u00e4 \ntarvittavista toimista humuskuormituksen v\u00e4hent\u00e4miseksi pintavesiss\u00e4. \nMaank\u00e4yt\u00f6n tunnistaminen merkitt\u00e4v\u00e4n\u00e4 tekij\u00e4n\u00e4 pintavesien tummumiseen \ntarkoittaa, ett\u00e4 maanpeitteen hallinta on t\u00e4rke\u00e4 tapa torjua tummumista.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Over the past decades, brownification in surface waters in the Northern \nHemisphere has been noticeable. Brownification is caused by an increased load \nof organic matter and carbon. The increase in watercolor is a result of controlling \nindustrial air pollution and the reduction of acid deposition. Climate change has \nalso been identified as being a root cause of rising watercolor trends through \nincreased temperature, precipitation, and runoff. Recently, catchment area land \nuse and properties have also been found to affect brownification. Drainage, \nespecially in peatlands, and other forestry actions have been found to increase \nthe humus load of water bodies and thus increase brownification. Brownification \nhas harmful effects on the condition of surface waters, water ecosystems and the \npurification of drinking water. This study examined the effect of land use and \nproperties of the catchment area on the brownification of lakes in 24 lakes' \ncatchment areas. The study looked at the trend of watercolor (mg/l Pt) in the \nstudy lakes between 1990 and 2022 and carried out geospatial data analyses, \nwhich looked at catchment area's size, water area, land area, forest area, field area, \ndrainage intensity, age of the forest as a measure of felling intensity, the \nproportion of spruce in the forests, peatlands, and groundwater forming areas. \nThe results of the spatial data analyses were examined in relation to the change \nin watercolor and, in addition, the differences between the catchment areas of \nbrowned and non-browned lakes were examined. The study found that lakes in \ncatchment areas with a small water area experienced more browning. The study \nalso found that peatlands and higher drainage intensity strengthen the browning \nof the lakes. The study also found that more tree felling took place in the \ncatchment areas of browned lakes than in the catchment areas of non-browned \nlakes. The results confirmed observations made in previous studies and raised \nconcern about the state of surface waters and questions about the necessary \nactions to reduce humus load into surface waters. Recognizing land use as a \nsignificant factor in surface water browning means that land cover management \nis an important way to manage browning.", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by Paivi Vuorio (paelvuor@jyu.fi) on 2023-05-25T06:14:31Z\nNo. of bitstreams: 0", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2023-05-25T06:14:31Z (GMT). No. of bitstreams: 0\n Previous issue date: 2023", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "83", "language": "", "element": "format", "qualifier": "extent", "schema": "dc"}, {"key": "dc.language.iso", "value": "fin", "language": null, "element": "language", "qualifier": "iso", "schema": "dc"}, {"key": "dc.rights", "value": "In Copyright", "language": null, "element": "rights", "qualifier": null, "schema": "dc"}, {"key": "dc.subject.other", "value": "ojitus", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Valuma-alueen maank\u00e4yt\u00f6n ja ominaisuuksien vaikutus j\u00e4rvien tummumiseen", "language": "", "element": "title", "qualifier": null, "schema": "dc"}, {"key": "dc.type", "value": "master thesis", "language": null, "element": "type", "qualifier": null, "schema": "dc"}, {"key": "dc.identifier.urn", "value": "URN:NBN:fi:jyu-202305253247", "language": "", "element": "identifier", "qualifier": "urn", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Master\u2019s thesis", "language": "en", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Pro gradu -tutkielma", "language": "fi", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Matemaattis-luonnontieteellinen tiedekunta", "language": "fi", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Faculty of Sciences", "language": "en", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Bio- ja ymp\u00e4rist\u00f6tieteiden laitos", "language": "fi", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Department of Biological and Environmental Science", "language": "en", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "Jyv\u00e4skyl\u00e4n yliopisto", "language": "fi", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "University of Jyv\u00e4skyl\u00e4", "language": "en", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Ymp\u00e4rist\u00f6tiede", "language": "fi", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Environmental science", "language": "en", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "yvv.contractresearch.collaborator", "value": "public", "language": "", "element": "contractresearch", "qualifier": "collaborator", "schema": "yvv"}, {"key": "yvv.contractresearch.funding", "value": "5000", "language": "", "element": "contractresearch", "qualifier": "funding", "schema": "yvv"}, {"key": "yvv.contractresearch.initiative", "value": "student", "language": "", "element": "contractresearch", "qualifier": "initiative", "schema": "yvv"}, {"key": "dc.type.coar", "value": "http://purl.org/coar/resource_type/c_bdcc", "language": null, "element": "type", "qualifier": "coar", "schema": "dc"}, {"key": "dc.rights.copyright", "value": "\u00a9 The Author(s)", "language": null, "element": "rights", "qualifier": "copyright", "schema": "dc"}, {"key": "dc.rights.accesslevel", "value": "openAccess", "language": null, "element": "rights", "qualifier": "accesslevel", "schema": "dc"}, {"key": "dc.type.publication", "value": "masterThesis", "language": null, "element": "type", "qualifier": "publication", "schema": "dc"}, {"key": "dc.subject.oppiainekoodi", "value": "40151", "language": "", "element": "subject", "qualifier": "oppiainekoodi", "schema": "dc"}, {"key": "dc.subject.yso", "value": "ojitus", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "maatalous", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "mets\u00e4talous", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "turvemaat", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "vesist\u00f6t", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "vedenlaatu", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "valuma-alueet", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "j\u00e4rvet", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "pintavesi", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "vesist\u00f6nkuormitus", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "vesiensuojelu", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "vesienhoito", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "vedenv\u00e4ri", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.rights.url", "value": "https://rightsstatements.org/page/InC/1.0/", "language": null, "element": "rights", "qualifier": "url", "schema": "dc"}]
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