Mass wasting in Lake Constance – A GIS-based geo-morphometric reconnaissance

New high-resolution hydroacoustic data from the »Tiefenschärfe« project in Lake Constance (central Europe) reveals a large amount of mass wasting events occurring on all slopes and influencing large parts of the lake floor. Within a GIS-supported geomorphologic investigation, a manual picking of mass transport deposits, as well as a digital reconnaissance were carried out, based on the visual appearance of mass transport deposits and on elevation-derived morphometric parameters, respectively. Subjective manual and objective (semi-)automatic detection strategies show the usability of the latter to be a new, easy-to-use assistive tool for identifying mass transport deposits in large bathymetric data sets and quantifying the morphological imprint of events on the lake floor. The iteratively determined algorithm divides mass wasting occurrences into the sub-features break-off edge, transport channel and depositional lobe and suggests morphometric dependencies for each sub-feature. Because Lake Constance consists of three mutually independent subbasins the algorithm success differs somewhat, which we credit to locally changing hydrodynamic and sedimentologic patterns.

Lake Constance | bathymetry | mass wasting | morphometry | GIS

• Ausgabe: HN 110 Seite: 8–12
• DOI: 10.23784/HN110-01
• Autor/en: Nils Brückner, Paul Wintersteller, Martin Wessels, Stefanie Gaide

A keystone in the defence oceanography community

As a scientist at the Underwater Acoustics and Marine Geophysics Research Institute of the German Federal Armed Forces (FWG) Thomas Wever has left remarkable traces with his contributions to the international research community. Above all the organisation of a symposium called »The Ocean’s Seafloor – One Bio-Geo System« was a gift to his colleagues. The results of this superb conference in October 2016 in Hannover are still resonating.

• Ausgabe: HN 109 Seite: 50
• DOI: 10.23784/HN109-11
• Autor/en: Chris Jenkins

In memoriam Dr. Thomas Wever

Am Samstag, dem 28. Oktober 2017, verstarb nach langer und schwerer Krankheit Herr Dr. Thomas Wever im Alter von 59 Jahren. Der Wissenschaftler bei der WTD 71 im Forschungsbereich für Wasserschall und Geophysik (FWG) in Kiel war schon lange krank, dennoch kam sein Tod für seine Kollegen und Freunde unerwartet, da er bis zuletzt zuversichtlich war, die Krankheit besiegen zu können.

• Ausgabe: HN 109 Seite: 48–49
• DOI: 10.23784/HN109-10
• Autor/en: Wolfgang Maier

GMT und DHyG intensivieren ihre Zusammenarbeit

Seit Jahren arbeiten die Gesellschaft für Maritime Technik (GMT) und die DHyG zusammen. Da heutzutage immer mehr Interessen für die Hydrographie und die hydrographische Wirtschaft vertreten werden müssen, haben sich die beiden Verbände entschlossen, künftig noch enger zu kooperieren. Vor allem ein gemeinsamer Arbeitskreis »Hydrographische Wirtschaft« soll etabliert werden, um Nutzer von hydrographischen Produkten mit den Anbietern zu vernetzen.

• Ausgabe: HN 109 Seite: 47
• DOI: 10.23784/HN109-09
• Autor/en: Holger Klindt

Connected 4D future – Hydro17 in Rotterdam

Hydro17 took place in November 2017 in Rotterdam. During the three days of this annual conference, six keynotes and 45 presentations were given on the theatre stage of the venue: the permanently moored cruiseliner SS »Rotterdam«. The conference theme was »Connecting 4D future«, aiming to stretch connection in space and time from hydrography to any other relevant disciplines.

• Ausgabe: HN 109 Seite: 43–45
• DOI: 10.23784/HN109-08
• Autor/en: Rob van Ree