Seegangsmessungen zur Erstellung von Bemessungsgrundlagen fuer Bauwerke des Insel- und Kuestenschutzes sowie zur ursaechlichen Deutung seegangsbedingter hydrodynamisch-morphologischer Wechselwirkungen.
Kurzbeschreibung Der BUND initiiert und koordiniert Strandreinigungsaktionen an verschiedenen Orten der Nord- und Ostsee, sowie an Gewässern des Binnenlandes. Zum Beispiel sammelt der BUND Bundesarbeitskreis „Meer und Küste“ jedes Frühjahr auf einer ostfriesischen Insel Strandmüll. Ergebnisse Siehe Website
Die Karte stellt die Verbreitung potenzieller Spülsande nördlich der Ostfriesischen Inseln dar. Dort werden für den Inselküstenschutz vorrangig mittelsandige Spülsande benötigt, um die stetige Küstenerosion durch den ansteigenden Meeresspiegel, Sturmflutereignissen sowie strömungsbedingten Materialabtrag und -transport zu kompensieren. Das Untersuchungsgebiet beschränkt sich auf ein Gebiet, das landseitig durch die -8 m NN Isobathe und seeseitig durch das südliche Verkehrstrennungsgebiet („Terschelling – Deutsche Bucht“) begrenzt wird. Flächenhafte Entnahmen von Spülsanden sind nur bis in eine Tiefe von 3 m möglich. Für den künftigen Bedarf müssen eventuell auch lokale Tiefenentnahmen bis in eine Tiefe von 20 m unter der Meeresbodenoberfläche in die Überlegungen einbezogen werden. Für die Auswertung des gesuchten Korngrößenspektrums wurden 2 Karten erstellt. Die Betrachtungsteufe unterscheidet sich hinsichtlich der Auswertung für eine Flächenentnahme bis 3 m Tiefe und einer zweiten zur Tiefenentnahme bis 20 m unter dem Meeresboden. Es wurden 2 Klassen ausgehalten, die potenzielle Vorkommen von Sand in den genannten Teufenbereichen ausweisen. Ist die Datengrundlage qualitativ hochwertig vorhanden, wurde die allgemeine Klasse "Sand" präzisiert und in "Fein- bis Mittelsand" untergliedert.
Ocean velocities were collected by a Teledyne RDI 1200 kHz Workhorse Sentinel II ADCP that was mounted on RV SENCKENBERG during RV SENCKENBERG cruise SE202208-2. The transducer was located at 1.5 m below the water line. The instrument was operated in single-ping, broadband mode with bin size of 0.25 m and a blanking distance of 0.25 m. The velocity of the ship was calculated from position fixes obtained by the Global Positioning System (GPS) received at a Trimble SPS461 Modular GPS Heading Receiver. Heading was obtained both from the Trimble receiver and the internal ADCP gyro. Heading as well as pitch and roll data from ADCP's internal gyrocompass and the navigation data were used by the data acquisition software ViSea DAS (AquaVision®) internally to convert ADCP velocities into earth coordinates. Accuracy of the ADCP velocities mainly depends on the quality of the position fixes as well as Trimble receiver and internal ADCP heading data. Further errors stem from a misalignment of the transducer with RV SENCKENBERG's centerline.
Data presented here were collected during the cruise SE202208-1 with RV Senckenberg from Neuharlingersiel, Germany to Neuharlingersiel, Germany (August, 01rst, 2022 to August 05th, 2022). In total, 16 vertical deep CTD-hauls were conducted. The CTD system used was a Sea-Bird Electronics Inc. SBE 19plus V2 probe (SN 7245). The CTD was attached to a SBE 55 Carousel Water Sampler (SN 5571979-0100) containing 6 4-liter Ocean Test Equipment Inc. bottles. The system was equipped with additonally an altimeter (Benthos, SN 4711), and a double chlorophyll fluorometer (SCUFA Turner, SN 0773). The sensors were pre-calibrated by the manufacturers. Data were recorded with the Seasave V 7.26.7.107 software and processed using the SeaBird SBE Data Processing. Data were converted, filtered, loop edited and bin averaged (size 0.25 m) and also visually checked. The ship position was derived from a trimble DGPS-system linked to the CTD data. The time zone is given in UTC. For more details on post-processing see the CTD processing report attached. Raw data on request.
Ocean velocities were collected by a Teledyne RDI 1200 kHz Workhorse Sentinel II ADCP that was mounted on RV SENCKENBERG during RV SENCKENBERG cruise SE202208-1. The transducer was located at 1.5 m below the water line. The instrument was operated in single-ping, broadband mode with bin size of 0.25 m and a blanking distance of 0.25 m. The velocity of the ship was calculated from position fixes obtained by the Global Positioning System (GPS) received at a Trimble SPS461 Modular GPS Heading Receiver. Heading was obtained both from the Trimble receiver and the internal ADCP gyro. Heading as well as pitch and roll data from ADCP's internal gyrocompass and the navigation data were used by the data acquisition software ViSea DAS (AquaVision®) internally to convert ADCP velocities into earth coordinates. Accuracy of the ADCP velocities mainly depends on the quality of the position fixes as well as Trimble receiver and internal ADCP heading data. Further errors stem from a misalignment of the transducer with RV SENCKENBERG's centerline.
Data presented here were collected during the cruise SE202206-1 with RV Senckenberg from Neuharlingersiel, Germany to Neuharlingersiel, Germany (June, 27th, 2022 to June 30th, 2022). In total, 30 vertical deep CTD-hauls were conducted. The CTD system used was a Sea-Bird Electronics Inc. SBE 19plus V2 probe (SN 7245). The CTD was attached to a SBE 55 Carousel Water Sampler (SN 5571979-0100) containing 6 4-liter Ocean Test Equipment Inc. bottles. The system was equipped with additonally an altimeter (Benthos, SN 4711), and a double chlorophyll fluorometer (SCUFA Turner, SN 0773). The sensors were pre-calibrated by the manufacturers. Data were recorded with the Seasave V 7.26.7.107 software and processed using the SeaBird SBE Data Processing V 7.26.7-b40. Data were converted, filtered, loop edited and bin averaged (size 0.25 m) and also visually checked. The ship position was derived from a trimble DGPS-system linked to the CTD data. The time zone is given in UTC. For more details on post-processing see the CTD processing report attached. Raw data on request.
Ocean velocities were collected by a Teledyne RDI 1200 kHz Workhorse Sentinel II ADCP that was mounted on RV SENCKENBERG during RV SENCKENBERG cruise SE202206-1. The transducer was located at 1.5 m below the water line. The instrument was operated in single-ping, broadband mode with bin size of 0.25 m and a blanking distance of 0.25 m. The velocity of the ship was calculated from position fixes obtained by the Global Positioning System (GPS) received at a Trimble SPS461 Modular GPS Heading Receiver. Heading was obtained both from the Trimble receiver and the internal ADCP gyro. Heading as well as pitch and roll data from ADCP's internal gyrocompass and the navigation data were used by the data acquisition software ViSea DAS (AquaVision®) internally to convert ADCP velocities into earth coordinates. Accuracy of the ADCP velocities mainly depends on the quality of the position fixes as well as Trimble receiver and internal ADCP heading data. Further errors stem from a misalignment of the transducer with RV SENCKENBERG's centerline.
Data presented here were collected during the cruise SE202203-2 with RV Senckenberg from Neuharlingersiel, Germany to Neuharlingersiel, Germany (March, 28th, 2022 to March 30th, 2022). In total, 33 vertical deep CTD-hauls were conducted. The CTD system used was a Sea-Bird Electronics Inc. SBE 19plus V2 probe (SN 7245). The CTD was attached to a SBE 55 Carousel Water Sampler (SN 5571979-0100) containing 6 4-liter Ocean Test Equipment Inc. bottles. The system was equipped with additonally an altimeter (Benthos, SN 4711), and a double chlorophyll fluorometer (SCUFA Turner, SN 0773). The sensors were pre-calibrated by the manufacturers. Data were recorded with the Seasave V 7.26.7.107 software and processed using the SeaBird SBE Data Processing. Data were converted, filtered, loop edited and bin averaged (size 0.25 m) and also visually checked. The ship position was derived from a trimble DGPS-system linked to the CTD data. The time zone is given in UTC. For more details on post-processing see the CTD processing report attached. Raw data on request.
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