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| Titel |
Methodology of determining soil structure in important groundwater areas:
case studies in Kauvonkangas, Finnish Lapland |
| VerfasserIn |
Juho Kupila |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250133541
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| Publikation (Nr.) |
 EGU/EGU2016-14164.pdf |
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| Zusammenfassung |
| Finland is fully self-sufficient in clean groundwater and even has a capacity of exportation.
There are approx. 6000 groundwater areas with a total yield of 5.4 million m3/day.
Currently only 10% of this groundwater resource is in use. For the efficient and safe
exploitation of these areas in the future, detailed modeling of soil structure is an important
method in groundwater surveys. 3D -models improve the general knowledge of
linkage between land use planning and groundwater protection. Results can be used
as a base information in water supply service development and when performing
the measures needed in case of environmental accidents. Also, when creating the
groundwater flow models the collected information is utilized and is usually the main data
source.
Geological Survey of Finland has carried out soil structure studies in co-operation with
authorities, municipalities and the local water suppliers. The main objectives of these projects
are to determine the geological structure of groundwater area for estimating the validity of the
present exclusion area, the quantity of ground water volume and recharge capability and
possible risks to the groundwater. Research areas are usually under an active water supply
service.
Kauvonkangas groundwater area is located in the municipality of Tervola, in Southern
part of Finnish Lapland. Extent of the area is 7.9 km2 and it is an important water source for
the local and nearby population centers. There are two active water supply companies in the
area. Field studies in the project will include general geological and hydrological mapping,
soil drilling with observation pipe installation, test pumping and water sampling.
Geophysical measures will play a key-role, including ground penetrating radar (GPR)
and gravimetric measurements. Studies will be carried out in spring and summer
2016. The main results will be the models of the bedrock and groundwater level and
main characteristics of the soil layers in the area. Results will also include the main
flow directions of the groundwater. Structure models will be done with Groundhog
-software.
Kauvonkangas -project is funded by local water supply companies Meri-Lapin Vesi and
Tervolan Vesi, Ministry of Agriculture and Forestry, and Geological Survey of Finland. |
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