The map viewer "Groundwater Reservoir" contains information about the distribution and abstraction possibilities of larger groundwater reservoirs. There is also information on the direction of flow of groundwater, groundwater dividers, surface water contacts, river basins, low-permeable layers on top of reservoirs, sub-areas and mapping methods.
The information is an important basis for planning society's water supply. The information is also used in land use and spatial planning issues in general, for example as a basis for environmental impact assessments and for action programmes for the protection of groundwater during construction.
SGU's database contains both overview, regional information at scale 1:250,000 and more detailed, local information at scale 1:50,000.
Where detailed information is produced, the overall information has been replaced by the detailed information. Which objects belong to which mapping type is visible in the "Mapping Methods" layer. The regional information originates from SGUs county maps published in SGUs series Ah. There may be several groundwater reservoirs at different levels as seen from the ground surface. The top level is called J1 or S1 and the underlying level or levels are referred to as J2, J3, and S2, S3, respectively. J stands for warehouses in soil layers and S stands for magazines in sedimentary bedrock:
J1: Groundwater reservoir in soil storage
J2: Groundwater reservoir in soil storage, wholly or partly under another underground reservoir (J1)
J3: Groundwater reservoir in soil storage, wholly or partly under another underground reservoir (J2)
S1: Groundwater reservoir in sedimentary rock
S2: Groundwater reservoir in sedimentary rock, wholly or partly under another sedimentary rock reservoir (S1)
S3: Groundwater reservoir in sedimentary rock, wholly or partly under another sedimentary rock reservoir (S2)
Choose English version inside the map viewer by clicking the flag in the upper right corner.
Last reviewed 2021-09-02