Fachbeiträge

Sämtliche Fachbeiträge aus den Hydrographischen Nachrichten seit der Ausgabe HN 100 sind online verfügbar.
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Extensive sheet pile wall inspection in the Port of Hamburg

In spring 2014 a survey was conducted in the Port of Hamburg to examine the condition of a quay wall. For this purpose Kongsberg Maritime Embient GmbH (KMEMB) introduced a three-stage inspection concept, which provides, according to the current state-of-the-art sonar-techniques, best possible information and analysis of the inspected object, while significantly reducing survey time and costs related to the inspection. On basis of the survey data, a complete picture of the quay wall was created. Several areas of specific interest have been detected, such as bended sheet piles, scouring and distorted steel plates.

quay wall inspection | underwater inspection | MBES | multi-frequency scanning sonar | 3D modelling

Ausgabe: HN 100 Seite: 12–15
DOI: 10.23784/HN100-02
Autor/en: Isabell Mücke

Bathmetry of Lake Constance – State-of-the-art in surveying a large lake

In 2014 the by far largest German lake has been newly surveyed. The transnational project is funded by the European Union and delivers a detailed 3D-model of the lakefloor. The German project name is »Tiefenschärfe – Hochauflösende Vermessung Bodensee«, which in English roughly means: high-resolution survey of Lake Constance. The German term »Tiefenschärfe« (in optics and photography: depth of field) plays with the meanings of »Tiefe« (depth) and »Schärfe« (sharpness). The result of the survey shall be a clear and sharp image of the deep and shallow lakefloor. At present the LiDAR and multibeam data are still processed, but first results are presented in this article.

Lake Constance | Tiefenschärfe | IGKB | lake level | geoid | groundwater intrusions | megaripples | pockmarks

Ausgabe: HN 100 Seite: 6–11
DOI: 10.23784/HN100-01
Autor/en: Martin Wessels, Flavio Anselmetti, Roberto Artuso, Ramona Baran, Gerhard Daut, Alain Geiger, Stefan Gessler, Michael Hilbe, Karin Möst, Berthold Klauser, Steffen Niemann, Robert Roschlaub, Frank Steinbacher, Paul Wintersteller, Ernst Zahn