Generalised hydrogeological map of Lower Saxony, 1 : 500 000 - Groundwater quality - pH
(HUEK500GWB_PH)
The generalised hydrogeological map of Lower Saxony, 1 : 500 000 - Groundwater quality: pH, shows the evaluation of a representative sample of pH values taken from the LBEG laboratory database. The data collected in the period 1967-2000 were averaged twice. Where groundwater monitoring wells were subject to multiple analyses, the averages of the available analysis results were formed. In addition, the data from all sampling wells in a 2000 m radius were averaged again.
pH values which are obviously caused by point-source anthropogenic inputs (e.g. abandoned landfills), are not included in these generalised maps. The pH values are shown in depth stages without reference to the local hydrogeological situation. The data therefore cannot be compared without taking the respective hydrogeological situation into consideration (e.g hydrogeological layering), nor can the data be adopted for detailed investigations.
The pH values shown in the generalised map lie in a range between 3.3 and 8.8 (median = 6.7). Very low pH values between 3.5 and 5.5 are primarily encountered in the groundwater of moor areas (e.g. Vehnemoor south-west of Oldenburg, Lichtemoor north-east of Nienburg or Wietingsmoor west of Sulingen). In lime-free rocks in which silicates and alumosilicates primarily determine groundwater quality, pH values between 5 and 6 are reached (e.g. Lüneburger Heide and Solling). The dissolution of carbonates leads to pH values increased to 7.5-8.5.
Additional documents
Informations about data
- Editing state:
Erfassung bzw. Erstellung der Daten ist abgeschlossen (completed).
- Date of last publication:
01.06.2008
- Information about data origin:
An Datengrundlagen sind eingegangen:
- Daten des NIBIS, einzelner Wasserversorger und des Niedersächsischen Landesbetriebs für Wasserwirtschaft, Küsten- und Naturschutz (NLWKN), Stand: März 2000
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
- CD-ROM (cdRom)
- Ausdruck (hardcopy)
- 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:
NIBIS-Metadaten, inspireidentifiziert, sgd_Hydrogeologie
- Key words GEMET:
Geology
- Thesaurus name:
GEMET - INSPIRE themes, version 1.0
- Thesaurus date of puplication:
2008-06-01
- Geometry type:
Punkt (point)
- Scale:
1:500000
- 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 )
- 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:
2325
- 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