Field measurements of wave run-up on coastal structures with a pressure step gauge

Research cooperation project between TU Tallinn (TUT) and TU Hamburg (TUHH)Founded by: Baltisch-Deutsches Hochschulkontor, Latvia


Summary

Wave run-up field measurements on German sea dikes have been carried out at the German North Sea coast in the last decade by the local authority responsible for coastal protection of the federal state of Schleswig-Holstein (LKN-SH) and in cooperation with the Institute of River and Coastal Engineering of TUHH (cp. Fig. 2). Lately, TUHH has developed a new prototype for wave run-up field measurements. Among others, the results have been used to validate and improve empirical formulas proposed in the well-known EurOtop manual.
We would like to use German know-how and equipment to measure wave run-up on local rubble mound breakwaters (cp. Fig. 1) which are adapted to icy conditions (with a smooth slope, similar to German sea dikes) and are thus different from normal breakwaters. The results are expected to have influence on empirical wave run-up calculations in Nordic and Baltic countries and thus improving cost-effective coastal engineering and management.
Moreover, the wave conditions near the breakwater are monitored with the help of a prototype for a miniature wave buoy (d=50cm, cp. Fig. 3) which will be validated and improved within an international research cooperation between scientists and engineers from Taiwan, Estonia and Germany.
The aims of the project are: i) implementation and optimization of the step gauge, ii) validation and improvement wave run-up formulas (e.g. EurOtop), iii) joint analysis and assessment of measurements at the North Sea and Baltic Sea, and finally iv) dissemination of results (public seminars and preparation of a joint scientific publication).

Background

The project participants know each other from scientific exchanges (e.g. a guest stay of Mr. Rain Männikus at TUHH in 2019) and the interests are based on joint research on the hydrodynamic conditions in the Baltic Sea and the consequences for coastal protection structures. A joint publication of the participants of the project (authors: Mr. Norman Dreier, Mr. Rain Männikus, Mr. Peter Fröhle) is under preparation and will be submitted to the International Coastal Symposium 2020. One of the aims of the project is the deepening of the relations between project partners and to exchange knowledge on the scientific questions for the preparation of future joint-project applications of the partners. German language will be used as one of the working languages between the project partners.

Duration: 02/2020-10/2020

Project Supervision: Peter Fröhle
Project Work: Norman Dreier
Jens Winkelbauer
Katrin Coelius