• HELCOM Metadata catalogue
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Changes to hydrological conditions (HOLAS 2)

Pressure layer combines all human activities that cause changes to hydrological conditions.


The human activities were presented as point data which were given spatial extents (given below). The pressure value was given as the proportion of the grid cell under the pressure.


The following human activities were combined into the changes to hydrological conditions layer;

- Hydropower dams (a 1km2 grid cell in the river estuary was selected)

- Water course modification (1 km)

- Wind turbines (operational, 0.3 km, linear decline)

- Oil platforms (0.5 km, linear decline)


The human activity datasets were first processed separately covering the whole Baltic Sea and then summed together and overlapping areas were dissolved to remove double counting. Attenuation gradients are assigned to each layer as described above. Area effected decreases when distance from avtivity increases. Layer was normalized.

Simple

Date (Creation)
2018-01-15
Unique resource identifier
https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/50a19d2e-bc8a-40f3-a786-9e26274778a6
pointOfContact
  HELCOM Secretariat

GEMET - INSPIRE themes, version 1.0

  • Hydrography

GEMET

  • environmental impact

Keywords
  • MADS

  • HOLAS2

Use constraints
Other restrictions
Other constraints

Use constraints: Data can be used freely given that the source is cited.

Access constraints
Other restrictions
Other constraints
Access constraints: No limitations on public access.
Spatial representation type
Grid
Metadata language
English
Topic category
  • Environment
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S
E
W
thumbnail


Begin date
2011-01-01
End date
2015-12-13
Unique resource identifier
EPSG:3035
Distribution format
  • TIFF ( )

OnLine resource
Download dataset ( WWW:LINK-1.0-http--link )
OnLine resource
Open in Map Viewer ( WWW:LINK-1.0-http--link )
Hierarchy level
Dataset

Conformance result

Date (Publication)
2010-12-08
Statement

Data source:

See separate fact sheet on human activities listed in the description.


Data quality: Gaps may occur.


Attribute information: Raster values represent the area effected (km2).


Spatial resolution: Original data as vectors, finally converted to 1 km x 1 km grid.

File identifier
50a19d2e-bc8a-40f3-a786-9e26274778a6 XML
Metadata language
English
Character set
UTF8
Hierarchy level
Dataset
Date stamp
2023-03-15T14:45:34
pointOfContact
  HELCOM Secretariat
 
 

Overviews

Spatial extent

N
S
E
W
thumbnail


Keywords

GEMET
environmental impact
GEMET - INSPIRE themes, version 1.0
Hydrography

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Associated resources

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