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Kartläggning av sand och naturgrus med hjälp av resistivitetsmätning på Själland, Danmark

På svenska

Author

  • Hanna Nilsson

Summary, in English

The purpose of this study is to analyze resistivity data from an area in Hilleröd municipality and to map the presence of sand and gravel. Gravel and sand are materials with high a demand in the construction sector, but also function as great groundwater reservoirs. Region Hovedstaden in Denmark wants to search for thick layers of sand (0.6-2 mm) and gravel (2-20 mm) in Själland for extraction. The research is performed in collaboration with the consultancy firm COWI A/S and is centered on an area north of Skævinge, which is approximately 2 km2. In the area, 12 resistivity measurement profiles have been carried out. The method, electrical resistivity, measures the specific electrical resistance of the ground. The measurements have been interpreted and two-dimensional models have been formed in the RES2DINV program. These models have been compared with wells from the area and one-dimensional profiles. After the modeling has been done, the profiles and wells have been inserted into the map in Qgis (geographic information system) and a description of the soil layers has been made. The geology has been mapped in the area and several areas with superficial layers of higher resistivity have been found, which are interpreted as sand and gravel. These coincide with the topography of the area. The results show that there is a potential for sand and gravel in the area for extraction. Core drilling is recommended to strengthen the interpretation.

Publishing year

2017

Language

Swedish

Publication/Series

Examensarbeten i geologi vid Lundsuniversitet

Document type

Student publication for Bachelor's degree

Topic

  • Earth and Environmental Sciences

Keywords

  • Danmark
  • geologi
  • resistivitetsmätning
  • geofysik
  • naturgrus
  • kvartärgeologi

Report number

522

Supervisor

  • Andreas Nilsson