Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
En jämförelse mellan markbundna resistivitetsmätningar och helikopterburen Sky-TEM i Skåne
2013 (Swedish)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Access to groundwater of good quality may in some places be limited. The Geological Surveyof Sweden (SGU) has for the first time in Sweden used Sky-TEM (Danish developed systemfor measurements with Transient Electromagnetic by helicopter) in an area of Skåne tomeasure the resistivity of the ground and thus identify areas with saline groundwater. Thisthesis has its basis in the comparison between those Sky-TEM measurements and fieldworkwith geoelectrical measurements (electrical resistivity measurement with a multi-electrodesystem)The geoelectrical measurements were carried out along two profiles in the area of theprivios Sky-TEM measurements. One of the profiles (Annero) in an area where the depthdown to the saline groundwater were interpreted to be large, and the other (Lillevångsgatan)in an area where the depth was interpreted to be small.The interpretations of Sky-TEM and geoelectrical measurements were not entirely inagreement with each other. They both showed a greater depth to the saline groundwater atAnnero and a smaller depth at Lillevång, but also that measurements with Sky-TEMsystematically pointed to a greater depth to the saline groundwater compared to thegeoelectrical. It could be derived from that TEM works best at low resistivities (<100 ohm-m)and electrical resistivity measurements are good at detecting contrasts between differentresistivities. The saline groundwater has a low resistivity (<10 ohm-m) and its surface createsno clear contrast. It is thus likely that the interpretation of the Sky-TEM measurements liesclosest to the truth.Measurements with Sky TEM provide good overall data but not as good detailed data.Many smaller geological formations and shifts are lost in interpretations of Sky-TEM data,these can however be more effectively detect the geoelectrical method. Sky-TEM is a goodmethod when large areas need to be examined and when the data does not have to be toodetailed. The geoelectrical method is good for smaller areas where more detailed informationis required. To get a good interpretation of how the ground looks like in the area requires acombination of both Sky-TEM measurements and geoelectrical measurements.

Place, publisher, year, edition, pages
2013. , p. 59
Keywords [en]
Technology
Keywords [sv]
Teknik, Resistivitet, grundvatten
Identifiers
URN: urn:nbn:se:ltu:diva-43992Local ID: 1cd827c9-180f-410b-8cd3-f80d3f5d2976OAI: oai:DiVA.org:ltu-43992DiVA, id: diva2:1017266
External cooperation
Subject / course
Student thesis, at least 30 credits
Educational program
Natural Resources Engineering, master's
Examiners
Note
Validerat; 20131216 (global_studentproject_submitter)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

Open Access in DiVA

fulltext(12755 kB)473 downloads
File information
File name FULLTEXT02.pdfFile size 12755 kBChecksum SHA-512
f2830d9407a9b3ebc84251b92eb9d014dcb58a2d4de1ab669f8227a2c784522109a7ee0a1a99ee9f61661e709b48a515a6590bd6cd6440daf3d7fd58087e5ccc
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Hansen, Alexander

Search outside of DiVA

GoogleGoogle Scholar
Total: 473 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 91 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf