Nitrogen retention from the National Nitrogen Model

This dataset shows the percentage nitrogen retention in Denmark, i.e. the proportion of nitrogen leached from the root zone that is transformed or retained in the subsurface and surface waters before reaching the coast. Nitrogen retention is calculated using the National Nitrogen Model and represents an average retention for the period 1990–2010. The dataset provides nationwide coverage of spatial variations in nitrogen retention and is used as a basis for assessing nitrogen transport and coastal nutrient loading.

The National Nitrogen Model version 2020 is documented in National Nitrogen Model – version 2020, a GEUS special report, including a method report (ISBN 978-87-7871-551-7) and an appendix (ISBN 978-87-7871-552-4), both available from GEUS (in danish).

Simple

Date ( Publication )
2020-12-15
Identifier
dk.geus / kvælstofretention
Presentation form
Digital map
Purpose
The purpose of the dataset is to support environmental management, planning and research related to nitrogen loading of the aquatic environment. The dataset is used in water management planning, assessment of mitigation measures, scenario analyses and modelling of nitrogen transport from land to sea.
Status
Completed
Point of contact
  The Geological Survey of Denmark and Greenland (GEUS) - Lars Troldborg ( )
Author
  The Geological Survey of Denmark and Greenland (GEUS) - Hans Thodsen
Author
  Aarhus University - Christen Duus Børgesen
Maintenance and update frequency
As needed
Point of contact
  The Geological Survey of Denmark and Greenland (GEUS) - GIS-support
Keywords ( Theme )
  • Dataset
  • Nitrogen retention
  • Aquatic environment
  • Nutrients
  • Denmark
Forskningsemner Forskningsemner ( Theme )
Geografisk Geografisk ( Place )
Access constraints
Other restrictions
Use constraints
Other restrictions
Other constraints
CC0 1.0
Spatial representation type
Vector
Denominator
100000
Metadata language
Da
Character set
UTF8
Topic category
  • Geoscientific information
  • Environment
  • Inland waters
Begin date
1990-01-01
End date
2010-12-15
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S
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Supplemental Information
The dataset includes attributes describing calculated nitrogen retention at the ID15 catchment level. Key attributes include total nitrogen retention from the root zone to the coast, retention in surface waters and groundwater, as well as associated uncertainty estimates. The dataset also contains information on whether a catchment is included as a measured catchment in the model or represents an unmeasured catchment for which retention is estimated based on average values.
Reference system identifier
ETRS 89 / UTM 32N (EPSG:25832)
Distribution format
  • WMS ( )

  • REST ( )

  • WMTS ( )

Distributor
  The Geological Survey of Denmark and Greenland (GEUS) - GIS-support
OnLine resource
Download ( WWW:DOWNLOAD-1.0-http--download )

Download dataset from GEUS' Dataverse

OnLine resource
Interactive webmap ( WWW:LINK-1.0-http--link )

Interactive map displaying the dataset.

OnLine resource
National Nitrogen Model 2025 – Method report ( DOI )

Method report documenting the calculation framework and model structure of the National Nitrogen Model.

OnLine resource
The National Nitrogen Model ( WWW:LINK-1.0-http--link )

Overordnet beskrivelse af Den Nationale Kvælstofmodel, dens anvendelser og datagrundlag.

OnLine resource
Kvaelstofretention ( ESRI:REST )

ArcGIS REST Service

OnLine resource
Kvaelstofretention ( OGC:WMS-1.3.0-http-get-capabilities )

ArcGIS WMS Service

OnLine resource
Denmark_Kvaelstofretention ( OGC:WMTS-1.0.0-http-get-capabilities )

ArcGIS WMTS Service

Hierarchy level
Dataset
Statement
The dataset was developed during the period mid-2013 to early 2015 by GEUS in collaboration with Aarhus University (DCE and DCA) as part of the work on the National Nitrogen Model. The map was subsequently revised in August 2015. Nitrogen retention is calculated using the National Nitrogen Model and represents model-based estimates of nitrogen transport and reduction from the root zone through groundwater and surface waters to the coast. The dataset is based on a subdivision into ID15 catchments and reflects the assumptions and data basis applied in the model at the time of calculation.
File identifier
f92f9e5c-ab8d-40ae-8f53-158f7b441ca1 XML
Metadata language
Danskda
Character set
UTF8
Hierarchy level
Dataset
Date stamp
2026-03-19T15:10:48.074502Z
Metadata standard name
ISO 19115:2003/19139
Metadata standard version
1.0
Point of contact
  The Geological Survey of Denmark and Greenland (GEUS) - GIS-support ( )
 
 

Overviews

overview

Spatial extent

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Keywords

Aquatic environment Dataset Denmark Nitrogen retention Nutrients
Forskningsemner
Computational geoscience, informatics and remote sensing Hydrology Soils and biogeochemistry

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Associated resources

Not available