Groundwater - daily groundwater levels from 9 locations at Cabauw

Groundwater levels at Cabauw have been measured since August 2003 in two fields south of the tower. Nine piezometers were placed in a row. Initially, 6 of those piezometers contained pressure transducers (of the brand Keller) to measure levels automatically every 4 hours. On 9 July 2010, the temporal resolution was increased to hourly. Several sensors have stopped working since 2003. Piezometers that were not measured automatically were measured during each filed visit, which was initially every 2 weeks, but has become longer towards the end of the measurement period.

Access dataset via API

The dataset can be downloaded via an API, more about this on the Developer Portal. Use the following API endpoint for access to this dataset:

Browse dataset

Browse through the files of this dataset. To retrieve a specific file, we recommend to use the API.

Data and Resources

Additional Info

Field Value
Dataset name cesar_grndwater_level_la1_t1d
Dataset version v1.0
Dataset edition 2
Dataset manager Claudia Brauer
Maintainer KNMI Data Services
Publication timestamp 2019-09-25T13:22:08Z
Reference system identifier EPSG4326
North bound latitude 51.975
East bound longitude 4.929
South bound latitude 51.968
West bound longitude 4.921
Dataset start time 2003-01-01
Dataset end time 2011-12-31
Update frequency notPlanned
Status completed
Identifier urn:xkdc:ds:nl.knmi::cesar_grndwater_level_la1_t1d/v1.0/
Lineage statement Dataset has been gap filled (see dataset description document)
Supplemental information This dataset was initial uploaded and distributed via CESAR Database System, CDS ( The full name in CDS was cesar_groundwater_leveldaily_la1_t1d, v1.0 A dataset description document can be downloaded from (note the CDS datasetID=1166 but DDD is missing, both daily and hourly datasets have the same DDD)
Use limitation No use limitations
Last metadata update March 28, 2022, 12:43 (UTC)