This dataset contains dredging sites reported by HELCOM Contracting Parties, according to the HELCOM Recommendation 36/2 ( https://helcom.fi/action-areas/industrial-municipal-releases/dredging/). Reporting of dredging sites is not mandatory according to the, but several Contracting Parties report information about dredging activities. The dredging sites are grouped by spatial data type to point, line and polygon datasets. The dredging site includes a link to corresponding site where the material has been deposited.

Attribute information (heading for downloadable shapefile):

Dredging ID (Dredging_I): Dredging site id, where material originates from

Deposit site (Helcom site ID) (Helcom_sit): Unique id for deposit site

Deposit site link (Deposit_si): Link to deposit site, where material from this dredging site is deposited

Site name (Site_name): Name of the dredging site

Type of area dredged (Type_of_ar): Type of area that was dredged (e.g. harbour or sea)

Dredging activity (Dredging_a): Maintenance or capital dredging

Material dredged (Material_d): The type of material dredged (e.g. sand, silt)

Year (Year): Year of activity

Country (Country): Contracting Party of HELCOM

Sub-basin (Sub_basin): HELCOM sub-basin (assessment unit level 2) where activity has taken place

Quality flag (Quality_fl): Quality flag of data

- Quality assured: Data is quality assured either in the annual verification or in a separate quality assurance process by EN DREDS

- No quality assurance: Data is not quality assured due to the reason that process has not been carried out

- No Quality assurance possible: Data quality assurance process has been made, but it was not possible to find the reference data to verify the parameters