www.geodatenkatalog.de (S1L)
Keyword
Grundwasser
689 record(s)
Provided by
Type of resources
Available actions
Topics
Keywords
Contact for the resource
Update frequencies
Service types
-
-
-
-
-
-
-
Die Daten zeigen Ergebnisse zur Überwachung der Radioaktivität in Grund- und Rohwasser; Rohwasser ist unbehandeltes, noch nicht gereinigtes oder aufbereitetes Wasser. Die Daten werden im Rahmen des Integrierten Mess- und Informationssystems (IMIS) von den Bundesländern im Auftrag des Bundes erhoben (siehe [<a href='http://www.bfs.de/DE/themen/ion/notfallschutz/messnetz/imis/imis_node.html' target='new'>http://www.bfs.de/DE/themen/ion/notfallschutz/messnetz/imis/imis_node.html</a>). Die dargestellten Punkte repräsentieren die jeweilige Verwaltungseinheit (Gemeinde). Die Farbe des angezeigten Punktes gibt die Höhe der Cs 137 Aktivität in der entsprechenden Maßeinheit wieder. Zusätzliche Informationen zur Messung wie Probenahmedatum, Messstelle, Medium, Maßeinheit sowie Messwerte zu K 40 und I 131 erhalten Sie über den Mausklick auf den Punkt. Weitere Informationen zur Radioaktivität in Grund- und Rohwasser finden Sie im Jahresbericht 2011 zur Umweltradioaktivität und Strahlenbelastung [<a href='http://nbn-resolving.de/urn:nbn:de:0221-2013090511044' target='new'>http://nbn-resolving.de/urn:nbn:de:0221-2013090511044</a>].
-
Das Landesamt für Bergbau, Energie und Geologie (LBEG) stellt Ihnen im Internet Daten aus den Bereichen Altlasten, Baugrund, Bergbau, Bodenkunde, Geologie, Grundwasser und Rohstoffe in einer Web-Mapping Anwendung mit umfangreichen Anzeige- und Auswahlfunktionen für Niedersachsen zur Verfügung. Darüber hinaus werden auch bundeslandübergreifende Daten, die in den Zuständigkeitsbereich des LBEG gehören, angeboten.
-
The World-wide Hydrogeological Mapping and Assessment Programme (WHYMAP) provides data and information about the earth´s major groundwater resources. The WHYMAP Viewer provides access to the topics “Groundwater Resources of the World", "World-wide River and Groundwater Basins", "World-wide Groundwater Vulnerability", "Karst Aquifers of the World", and to the “World-wide Hydrogeological Map Information System (WHYMIS)”.
-
Considering water as the primary resource necessary for social life, agriculture, industry, and wealth, the importance of groundwater investigation is clear. Apart from many other pollutants, this work focusses on geogenic uranium (U) and radium (Ra), which both stand for natural radionuclides (NORM) that need to be considered frame of groundwater exploration and monitoring programmes due to their specific mobility and chemo-/radiotoxicity. As investigation of U and – to a lesser extent - Ra is done by an increasing number of scientific working groups, the global dataset is improving continuously. In order to give a summarized overview on available and recent literature, scientific papers, reports, and governmental documents have been reviewed for U-238 mass concentrations and Ra-226 and Ra-228 activity concentrations and collected in tables and global maps. Further natural isotopes of U and Ra have been rarely subject of investigation. The collected data were evaluated and interpreted in frame of an associated scientific publication (see citation). From the available data it can be concluded that high geogenic U occur mainly under oxidizing conditions and carbonate rich groundwater, which might be seen as indicator for elevated U concentrations. Certain geological formations, as for example sedimentary, granitic, and volcanic host rocks, promote high U concentrations in groundwater. For geogenic Ra, the search for definite indications proved difficult, since less clear correlation is given for any observed factor. In a global perspective, the most promising evidence for elevated Ra are highly reducing redox conditions, as well as the occurrence of Fe/Mn mineral phases. Furthermore, barite represents a sink for Ra due to its ability to incorporate Ra isotopes. Dissolution of those mineral phases eventually results in co-dissolution of Ra, when Ra is found in host rocks of investigated aquifers, or downstream of such groundwater reservoirs. Furthermore, cation exchange might enhance Ra mobility process, especially in case of sedimentary aquifers with low sorption capacity and/or aquifers with high salinity. Given those chemical requirements for the occurrence of U and Ra, a negative correlation between mother and daughter nuclide can be established. When knowledge on present geological and geochemical constraints is available, elevated U and Ra concentrations might be predictable, as long as anthropogenic influence is excluded.