Generalised hydrogeological map of Lower Saxony, 1 : 200 000 – Groundwater contour map
(HUEK200GWO)
The depth of a confined groundwater table or a phreatic surface is usually visualised using groundwater contours (isohypses). This map topic shows the groundwater table for all of Lower Saxony's unconsolidated rock regions. In the consolidated rock regions of southern Lower Saxony, this type of visualisation is not possible, because a large, spatially contiguous body of groundwater does not generally exist here. In consolidated rock the groundwater either moves along joint and fault systems or through karst cavities. Although considerable groundwater reserves may well exist in consolidated rock, e.g. in karst regions, they cannot be sensibly visualised using groundwater contours. These regions are shown as consolidated rock in the map and the assumed direction of groundwater flow indicated by arrows.
Generally, groundwater level measurements taken simultaneously at all monitoring wells are used to construct the groundwater contours. Reference day measurements are available for larger regions, but not for all of Lower Saxony. It was therefore necessary to adopt groundwater level measurements made at different times for this groundwater contour map, converted to mean water levels. All monitoring wells within the state hydrological service (Gewässerkundliche Landesdienst) monitoring network were included in the evaluation. Numerous other monitoring wells supplement these state monitoring wells. They are monitored during the course of waterworks operations, conservation of evidence procedures and special programmes and and are also utilised for this map.
To improve visualisation of the groundwater contours, the intermediate areas have a coloured backdrop. The coloured areas reflect the depth to the groundwater table or to the phreatic surface in m NN.
The groundwater contour map is suitable for visualising the groundwater's large-scale direction of flow and the potential gradient conditions in the unconsolidated rock regions.
Additional documents
Informations about data
- Editing state:
Erfassung bzw. Erstellung der Daten ist abgeschlossen (completed).
- Date of last publication:
01.01.1982
- Information about data origin:
An Datengrundlagen sind eingegangen:
- Daten des Niedersächsischen Landesbetriebs für Wasserwirtschaft, Küsten- und Naturschutz (NLWKN)
- Daten von Wasserversorgungsunternehmen
- Bohrungen der Bohrdatenbank Niedersachsen
- Archivunterlagen des LBEG
Contact person
Phone:
+49 (0)511-643-3613
Fax:
+49 (0)511-643-533613
Online access to data
To access the data online you can use the following applications/services:
Distribution information
Common informations (order proccess, product choise, prices):
NIBIS-Preisliste, AGB, Vergütungsverzeichnis für Leistungen des LBEG, Bestellhinweise (https://www.lbeg.niedersachsen.de/portal/live.php?navigation_id=613&article_id=905&_psmand=4); Produktkatalog des LBEG (https://www.lbeg.niedersachsen.de/download/1238)
Data formats
- ArcGIS-Shapefile
(
Version:
inapplicable)
- JPEG
(
Version:
inapplicable)
- PDF
(
Version:
inapplicable)
- TIFF
(
Version:
inapplicable)
Data medium
- Ausdruck (hardcopy)
- CD-ROM (cdRom)
- DVD (dvd)
Distribution contact
Phone:
+49 (0)511-643-3354
Fax:
+49 (0)511-643-533354
Additional information about the data
- Format of data:
digitale Karte in Raster- oder Vektorform (mapDigital)
- Topic:
Geowissenschaften
(geoscientificInformation)
- Key words:
inspireidentifiziert, sgd_Hydrogeologie, NIBIS-Metadaten
- Key words GEMET:
Geology
- Thesaurus name:
GEMET - INSPIRE themes, version 1.0
- Thesaurus date of puplication:
2008-06-01
- Geometry type:
Fläche (surface)
- Scale:
1:200000
- Structure of spacial data:
Flächen flächendeckend (fullSurfaceGraph)
- Coordinate system:
4647; ETRS89 / UTM zone 32N (zE-N)
(Europäisches Terrestrisches Referenzsystem von 1989 / Universale Transversale Mercatorabbildung Zone 32N)
- Altitude reference system:
DE_DHHN92_NH
- Reference layer:
Datenbestand (dataset )
, Datenbestand (dataset )
- Language:
ger
- Character set:
utf8
Access- and security restrictions
- Security classification:
unbeschränkt (unclassified)
- Access restriction:
Urheberrecht (copyright)
- Restriction of application:
Allgemeine Geschäftsbedingungen -AGB- des Landesamtes für Bergbau, Energie und Geologie (LBEG) und die Anlage Vergütungsverzeichnis für Leistungen des LBEG
Information about content (auto detected)
- Amount datasets/features:
keine Angabe
- Spacial notation:
vector
- Eastern longitude:
6.5475
to
11.7416
- Northern latitude:
51.225
to
53.9343
About this data description
- Metadata standard:
Standard
ISO 19115
,
version
ISO 19115:2003/Cor. 1:2006 (E)
- Metadata status:
05.09.2022
- Metadata language:
ger
- Metadata character code:
utf8
Metadata contact