ELBE - Phase II: Morphodynamic phenomena with a focus on bedload management and alternating bars at the federal waterway Elbe
Abstract
River regulation (channel narrowing, course shortening and the construction of dikes) and sediment retention in the catchment area (by dams, retention basins and impoundments) increased the Elbe's transport capacity and led to riverbed erosion, especially in the section between El-km 121 and El-km 290 ("erosion section"). To counteract the riverbed incision, gravel is added by means of dump barges at water levels suitable for navigation. However, the augmentation is insufficient because the high bedload transport capacities during larger discharge events cannot be compensated for in the periods with smaller, navigable discharges. In phase 1 of the project, initial preliminary investigations were undertaken and proposed solutions to improve the current situation with regard to bedload management. Conveyor belt augmentation and depositional dumping in combination with bank erosion were identified as promising possible measures for supplementary bedload input. Possible sections for such augmentation methods were identified and the design of the measures was outlined. However, there is a lack of experience with such measures, knowledge of the determining process sequences and thus also the knowledge for optimised designs. In phase 2 of the project, 1:1 tests in nature on alternative addition methods will be designed, planned and carried out, accompanied by a monitoring programme in the field and process analyses in the laboratory. The present project includes phase 2a, which includes the conception and planning of the field tests and a pre- and on-site monitoring. In addition, an exchange of research on the topic of alternating banks will lead to the definition of further procedures.
sediment management gravel augmentation alternating banks monitoring
Publikationen
Project staff
Helmut Habersack
Univ.Prof. Dipl.-Ing. Dr.nat.techn. Dr.h.c. Helmut Habersack
helmut.habersack@boku.ac.at
Tel: +43 1 47654-81901, 81911
Project Leader
10.03.2023 - 05.06.2023
Project Leader
03.07.2023 - 31.05.2026
Marcel Georg Liedermann
Dipl.-Ing. Dr.nat.techn. Marcel Georg Liedermann
marcel.liedermann@boku.ac.at
Tel: +43 1 47654-81914
Project Leader
01.03.2023 - 02.07.2023
Project Leader
06.06.2023 - 02.07.2023
Roman Dunst
Dipl.-Ing. Roman Dunst
roman.dunst@boku.ac.at
Tel: +43 1 47654-81932
Project Staff
01.03.2023 - 31.05.2026
Mario Klösch
Dipl.-Ing. Dr. Mario Klösch
mario.kloesch@boku.ac.at
Tel: +43 1 47654-81913
Project Staff
01.03.2023 - 31.05.2026
Michael Krapesch
Dipl.-Ing. Michael Krapesch
michael.krapesch@boku.ac.at
Tel: +43 1 47654-81915
Project Staff
01.03.2023 - 31.05.2026