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Inorganic geochemistry of sedimentary rocks in the catchment of river Thuringian Saale during the last 600 Ma

A literature retrieval was performed for whole rock geochemical analyses of sedimentary, magmatic and metamorphic rocks in the catchment of River Thuringian Saale for the past 600 Ma. Considering availability and coincidence with paleontological an facies data the following indicators seem suitable to detect environmental and climatic changes: biogenic P for Paleoproductivity, STI Index for weathering intensity, Ni/Co-ratio for redox conditions, relative enrichments of Co, Ba and Rb versus crustal values for volcanic activity at varying differentiation. The Mg/Ca-ratio as proxy for salinity is applicable in evaporites. The binary plot Nb/Y versus Zr/TiO2 indicates a presently eroded volcanic level of the Bohemian Massif as catchment area for the Middle Bunter, whereas higly differentiated volcanics provided source material for Neoproterozoic greywackes. A positive Eu-anomaly is limited to the Lower Bunter and implies mafic source rocks perhaps formerly located in the Bohemian Massif.

Geochemie und Erzaufbereitung

Eine Reihe von untersuchten thalliumhaltigen sulfidischen Mehrstoffsystemen zeigt, dass Thallium in polymetallischen Erzen vornehmlich mit Silber vergesellschaftet ist und zur Bildung von Sulfosalzen des Arsens und/oder Antimons neigt, bei Abwesenheit von Antimon auch mit Wismut. Folglich lassen sich die T1-Mineralien durch selektive Flotation weitgehend vom Haupterz abtrennen und in den Sulfosalzen anreichern.

Technische Planung Küsten- und Hochwasserschutz, Bau und Unterhaltung von Küstenschutzanlagen

Erarbeitung von Planungsunterlagen für verschieden Küstenschutzmaßnahmen (Leistungsphase 1-6 nach HOAI) Betreuung an Ingenieurbüros vergebener Planungsleistungen, Autorenkontrolle, Planung und Ausführung Naturschutzfachlichen Einschätzungen und Konzeptionen Aufstellen von Küstenschutzkonzeptionen, Fachplänen und Gebietsanalysen Bemessung und Konstruktion der geplanten Küstenschutzbauwerke

Digital surface model of the watercourses Elbe and Lower Havel (Germany), DGM-W Elbe project, DOM Elbe 2022

The high-resolution digital surface model (DSM1, DOM1) of the watercourses Elbe and Lower Havel is based on the airborne laser scanning data, undertaken from 06 January 2022 to 18 March 2022 in the Elbe area and from 20 to 22 December 2021 in the Havel area. It was produced and published by Germany’s Federal Institute of Hydrology (BfG), on behalf of the River Basin Community Elbe (RBC Elbe, FGG Elbe). The work was supported by the German Federal Waterways and Shipping Administration (WSV) and the surveying offices and water management administrations of six German states - Saxony, Saxony-Anhalt, Brandenburg, Lower Saxony, Mecklenburg-Vorpommern and Schleswig-Holstein. The data cover both the area around the inland water stretches of the Elbe from the Czech-German border to the village of Zollenspieker (part of the city of Hamburg) and the Lower Havel waterway from the town of Rathenow to its confluence with the Elbe. Since the dataset has a large coverage of 4,043 km², it is split into 62 sections. They were either labelled *HW in case of flood relevant areas (in German: “hochwasser-relevante Gebiete”) or *AU in case of historical floodplains (in German: “Altauengebiete”). Financing was divided according to these categories: In the HW areas, the project was co-funded by BfG, the WSV and the federal states, while in the AU areas, BfG covered all project costs. For each section we provide hillshade (*HS) and height maps (*NHN). The data are available in a raster resolution of 1 meter in GeoTiff format; Coordinate reference frame: ETRS89.DREF91.R16; Coordinate projection: UTM Zone 33N; EPSG-Code: 25833; Height reference system: DHHN2016, national vertical reference frame in Germany (2022). For further information please contact us. Citation short: BfG et al. / i.A. FGG Elbe (2025)

Digital terrain model of the watercourses Elbe and Lower Havel (Germany), DGM-W Elbe 2022 project

The high-resolution digital terrain model (DTM) of the waterways Elbe and Lower Havel (DGM-W Elbe 2022) comprises both the terrain on land and the bottom of rivers, channels and lakes. It was produced and published by Germany’s Federal Institute of Hydrology (BfG), on behalf of the River Basin Community Elbe (RBC Elbe, FGG Elbe). The work was supported by the German Federal Waterways and Shipping Administration (WSV) and the surveying offices and water management administrations of six German states - Saxony, Saxony-Anhalt, Brandenburg, Lower Saxony, Mecklenburg-Vorpommern and Schleswig-Holstein. The data cover both the area around the inland water stretches of the Elbe from the Czech-German border to the village of Zollenspieker (part of the city of Hamburg) and the Lower Havel waterway from the town of Rathenow to its confluence with the Elbe. Since the dataset has a large coverage of 4,043 km², it is split into 62 sections. They were either labelled *HW in case of flood relevant areas (in German: “hochwasser-relevante Gebiete”) or *AU in case of historical floodplains (in German: “Altauengebiete”). Financing was divided according to these categories: In the HW areas, the project was co-funded by BfG, the WSV and the federal states, while in the AU areas, BfG covered all project costs. For each section we provide hillshade (*HS), height maps (*NHN), slope (*sl) and source flags (*sc). The data are available as GeoTIFF-files (resolution 1 meter); Coordinate reference frame: ETRS89.DREF91.R16; Coordinate projection: UTM Zone 33N; EPSG-Code: 25833; Height reference system: DHHN2016, national vertical reference frame in Germany (2022). For further information please contact us. Citation short: BfG et al. / i.A. FGG Elbe (2025)

Retrospective trend analysis of biocides in suspended particulate matter of major German rivers

Dierkes, Georg; Schmidt, Susanne; Meier, Christiane; Ziegler, Korinna; Koschorreck, Jan; Wick, Arne Environ Sciences Europe, online: 25. Januar 2025 Background Due to their intrinsic biological activity biocides can pose an unintended threat to various aquatic organisms. Monitoring data on the spatial distribution and temporal trends are needed to evaluate potential risks and the effectiveness of mitigation measures, but these are scarce for biocides in aquatic environments. In particular, even though many biocides tend to sorb to particles, there are only few studies investigating the contamination of suspended particulate matter (SPM). The aim of this study was to obtain an overview of the temporal trends of selected biocides in SPM using German rivers as an example. For this purpose, SPM from the German Environmental Specimen Bank was used for a retrospective trend assessment of a broad spectrum of biocides in integrated SPM samples (yearly composite) in six large German rivers between 2008 and 2021. Results Overall 16 of 23 analyzed biocides were found, whereof 10 substances were detected in all samples. Highest concentrations were found for quaternary ammonium compounds (QACs, the sum of four analyzed QACs were up to 8.7 µg/g) and methyl-triclosan (up to 280 ng/g), a transformation product of the bactericide triclosan. Considerably lower concentrations in the range of 0.08 to 88 ng/g and < 0.03 to 13 ng/g were detected for azoles and triazines, respectively. The pyrethroid permethrin, which is highly toxic to aquatic organisms (invertebrates: NOEC = 0.0047 µg/L; fish: NOEC = 0.41 µg/L) as well as to sediment-dwelling organisms (Chironomidae: LC50 = 2.1 mg/kg and NOEC 0.1 mg/kg), was detected at several sampling sites (up to 11.2 ng/g). Concentrations of the other analyzed pyrethroids were below the respective quantification or detection limits. In general, for most compounds, concentrations were higher for locations with higher wastewater proportion, but overall no clear differences in biocide concentration pattern between the different sampling locations were observed. For cybutryne and triclosan significant decreasing concentration trends were observed. This is consistent with regulatory use restrictions and confirms their effectiveness. For benthic organisms a toxicological risk from the individual azole fungicides and QACs seems to be low. Conclusions Explicit differences between sampling sites and temporary changes in local concentrations indicate regional variations of biocide emissions which hamper identification of long-term concentration trends. Moreover, time trends could be affected by remobilization of legacy contamination from contaminated sites. Hence, for biocides a continuous long-term monitoring is crucial to identify the effectiveness of recent restrictions and mitigation measures. doi.org/10.1186/s12302-025-01053-5 Overview of SPM sampling sites. The red dots represent the sampling sites for this study (Rehlingen/Saar 2008–2021, Koblenz/Rhine 2008–2021, Bimmen/Rhine 2008–2021, Zehren/Elbe 2013–2021, Jochenstein/Danube 2009–2021, Dessau/Mulde 2008–2021, Wettin/Saale 2008–2021). Catchment area in km2, population in million inhabitants (2017), averaged discharge (2008–2021) in m3/s.

Trace element contents for the <2 μm, 2-20 μm and bulk fractions from LGM European loess sequences

Trace element contents in microg/g measured on the <2 microns, 2-20 microns size fractions and bulk samples from LGM European loess sequences. Samples were crushed in an agate mortar and trace element concentrations were measured following Chauvel et al. (2011). Reproducibility for trace element analyses is better than 5% based on repeat measurements, and the accuracy is also better than 5%, based on the analyses of international rock standards (JSD-1, JSD-3 and LKSD-1.

TWS_HQS_TK25

Abgrenzung der hessischen Trinkwasser- und Heilquellenschutzgebiete zur Darstellung auf der Topografischen Karte (TK) 1:25000 (nicht der Digitalen TK25). Es wird darauf hingewiesen, dass die hier vorgelegten Abgrenzungen keine rechtsverbindliche Aussage darstellen und daher nur der Orientierung dienen können. Die rechtsverbindlichen Unterlagen liegen bei den jeweils zuständigen Regierungspräsidien, Abteilung Umwelt (Dezernate 41.1 bzw. 31.1). Weitere Informationen zu Wasserschutzgebieten finden Sie im Fachinformationssystem Grundwasserschutz / Wasserschutzgebiete unter gruschu.hessen.de.

Untersuchung ueber die Wechselwirkung von Klaerschlaemmen auf unbelastete und belastete Boeden

Die Belastung von Boeden setzt eine Klaerung der geogenen und anthropogenen Herkunft von relevanten Schadstoffen voraus. Exakte Aussagen ueber die Herkunft solcher Schadstoffe lassen sich jedoch stets nur dann machen, wenn auch die lokalen geochemischen Verhaeltnisse bekannt sind und bei den Untersuchungen mit erfasst werden. Dieses ist besonders ausschlaggebend, wenn Klaerschlaemme aufgebracht werden. Hierbei sind die Tonmineralien als Schadstoffadsorber eine Loesung zur Vermeidung der staendig wachsenden Mengen, die insbesondere zur Deponierung oder Verbrennung fuehren. Desweiteren sind bisher nur wenige Untersuchungen ueber die Relevanz von Arsen und Thallium durchgefuehrt worden.

Erstellung von 'Environmental Health Criteria' Dokumenten (IPCS/WHO)

Im Rahmen des Internationalen Programms fuer Chemische Sicherheit (IPCS) wird an der Erstellung mehrerer Baende der Schriftenreihe 'Environmental Health Criteria Documents' als 'leading institution' gearbeitet. Unter gemeinsamer Verantwortung wird die Reihe vom 'United Nations Environmental Programme' (UNEP), der 'International Labour Organisation' (ILO) und der 'World Health Organization' (WHO) herausgegeben. Ziel der Kriteriendokumente ist es, vorhandene Informationen ueber eine definierte Chemikalie oder Stoffgruppe zu sammeln, sie zu ueberpruefen und sie zu bewerten. Damit soll eine wissenschaftlich fundierte Grundlage geschaffen werden, die besonders in den Entwicklungslaendern politische Entscheidungen ermoeglicht, um Mensch und Umwelt vor nachteiligen Folgen einer entsprechenden Exposition zu schuetzen.

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