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Miljøovervåking av kulturminner i grunnvannsbrønner i Dronning Eufemias gt. (DEG), Oslo Sluttrapport 2010 til 2018

Authors: Bergersen, Ove;

Miljøovervåking av kulturminner i grunnvannsbrønner i Dronning Eufemias gt. (DEG), Oslo Sluttrapport 2010 til 2018

Abstract

I forbindelse med anleggsarbeider for anleggelse av nytt hovedgateløp i Bjørvika-byen, Oslo, er det igangsatt et miljøovervåkningsprogram for å dokumentere bevaringstilstand og bevaringsforhold i kulturlag i området. Flere miljøbrønner var i drift ved oppstart, men pga. ferdigstillelse av trikketrase og vei ble flere avviklet våren 2014. Videre overvåking instrumentert med multiparametersensorer for overvåkning av temperatur, pH, ledningsevne og redokspotensialet i grunnvannet fortsatte i miljøbrønn MB4, sammen med en ny miljøbrønn (MB8) etablert i 2013. Sistnevnte hadde i tillegg oksygensensor. Logger i MB8 ble ødelagt av fuktighet slik at vi mangler data i en periode etter mai 2015 til 2016. De første 3 års overvåking i MB3, MB4, MB5 & MB7 er fremstilt i eget kapittel. De resterende år 2014 og ut måleperioden beskriver overvåkings data fra brønn MB4 og MB8. Det er kun MB4 som har dataserier i alle år. En viktig observasjon er at grunnvannet ble målt under 1 moh. i de første årene i alle aktive brønner, men steg over 1 meter fra 2014 i både MB4 og MB8. En slik økning betyr bedre bevaring av kulturlag i øvre del av boreprofilene analysert i 2010. Temperaturen til grunnvannet har ligget i underkant av 10°C. Lav jordtemperatur sammen med negative redoksverdier og lave oksygenkonsentrasjoner gir en gunstig situasjon for bevaring av kulturminner i Bjørvika. Disse resultatene og egenskapene til grunnvannet som berører resterende kulturminner over, under, eller nær brønnen indikerer gode bevaringsforhold av organisk og uorganisk materiale in Situ for regionen under og etter bygging av ny veitrase.

Country
Norway
Keywords

Miljøovervåkning, Ground water, VDP::Natural resource management: 914, Cultural heritage, Environmental monitoring, Grunnvann, Kulturminner, VDP::Naturressursforvaltning: 914

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  • citations
    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    0
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Average
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    Average
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Average
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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Related to Research communities
Digital Humanities and Cultural Heritage