Field studies as a basis for determining the erosion stability of dyke cover layers when greened with different seed mixtures for conditions in Hamburg
Project description
The REGIOSAAT-HH research project investigates the suitability of various seed mixtures for greening dyke cover layers under the specific conditions of the Free and Hanseatic City of Hamburg. The aim is to systematically evaluate the erosion stability, resistance and durability of the turf in combination with the clay or marl cover. The focus is on both hydrodynamic loads (e.g. wave run-up, overflow, flow shear stresses) and climatic effects such as dry periods, heavy rainfall or frost, which will become more severe in the future as a result of climate change.
Against the backdrop of growing flood protection requirements, ecological objectives (including the use of native seeds in accordance with Section 40 of the Federal Nature Conservation Act) and increasing demands on the use of dykes, the project is conducting multi-year field trials on a real scale. To this end, different seed mixtures are sown at a test site and exposed to repeatedly defined stress scenarios over several years. In addition, evaluations are carried out on vegetation development, root penetration, shear strength, susceptibility to erosion and crack formation in the top layer.
The results should enable an objectively comparable assessment of the condition of different dyke vegetation and lead to practical recommendations for the selection, use and monitoring of seed mixtures in dyke construction in Hamburg. Close cooperation between the university and the relevant authorities ensures a direct transfer of knowledge between research and practice and contributes to the climate-resilient further development of flood protection.
Project participants
Project duration
- Planned project duration: approx. 2026 - 2029
- Total duration: 4.5 years
