Salinization map 2014/2017 conservative (m-mv)

The map, based on the helicopter measurements of 2014 and 2017, shows a conservative estimate of the depth of the interface between fresh and brackish groundwater in meters relative to ground level. Taking into account the uncertainty of the measurements, two versions of the salinization map were drawn up: 1. A conservative estimate of the depth of the interface, assuming a 95% chance that fresh groundwater will be found above this interface. 2. An optimistic estimate of the depth of the interface assuming an 89% chance of fresh groundwater being found above this interface. Fresh water means a conductivity less than 2000 µS/cm. It is recommended to consult both interfaces to estimate the fresh-brackish water distribution at a particular location. In addition, the data points are available (“versiltingskaart_2014/2017_helicopter measurements”) so that it can be checked where effective measurements were taken and where interpolation took place. The data points are located on flight lines where a vertical profile can be consulted showing the salinity, the bulk resistivity, the lithology and the stratigraphy. The profiles show the boundary between fresh and brackish (optimistic and conservative) and between brackish and saline groundwater. The boundary between brackish and saline groundwater is defined as 25000 µS/cm. Due to buildings and other obstacles, certain zones within the coastal and polder area could not be measured. For these areas, one can fall back on the 1974 salinization map.

Data and Resources

Additional Info

Field Value
Last Updated July 27, 2023, 10:59 (UTC)
Created July 27, 2023, 10:59 (UTC)
GUID db9493ed-7831-4c29-8f51-1d4c60612175
access_constraints ["Bij het gebruik van de informatie die DOV aanbiedt, dient steeds volgende standaardreferentie gebruikt te worden: Databank Ondergrond Vlaanderen - (vermelding van de beheerder en de specifieke geraadpleegde gegevens) - Geraadpleegd op dd/mm/jjjj, op https://www.dov.vlaanderen.be"]
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bbox-north-lat 51.38821764042906
bbox-south-lat 50.92966860281871
bbox-west-long 2.528999693191497
contact-email dov@vlaanderen.be
coupled-resource []
dataset-reference-date [{"type": "creation", "value": "2019-05-09"}]
frequency-of-update
graphic-preview-file https://www.dov.vlaanderen.be/geoserver/wms?SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&FORMAT=image%2Fpng&TRANSPARENT=false&STYLES&LAYERS=gw_varia:verziltingskaart_2014_2017_con_mmv&SRS=EPSG%3A31370&WIDTH=858&HEIGHT=330&BBOX=9518.482229747839%2C148172.73525929108%2C271454.8939534676%2C248854.86152133934
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harvest_source_id a1ad0b10-1c73-4916-9862-424d20a41377
harvest_source_title Flemish region - Open Data Portal CSW Flanders
licence []
lineage In april 2014 en juli 2017 voerde de VMM metingen uit in het kust- en poldergebied om de verziltingstoestand van het grondwater te bepalen. Elektromagnetisch onderzoek vanuit de lucht is de meest efficiënte methode om zoet en zout grondwater regionaal te karteren. De verdeling tussen zoet en zout grondwater werd al eens in kaart gebracht in de jaren 1960 en 1970. Dat is toen bekendgemaakt via de verziltingskaart (1974). De helikoptermetingen werden gebruikt om een nieuwe verziltingskaart (2014/2017) op te maken.
metadata-date 2023-03-24
metadata-language dut
progress completed
resource-type dataset
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