Project Co-Funded by European Union Funds (ERDF, IPA) Impressum
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Project co-funded by European Union funds (ERDF, IPA) Impressum Authors: H. Habersack1, S. Baranya2, K. Holubova3, F. Vartolomei4, H. Skiba5, M. Babic-Mladenovic6, A. Cibilic7, U. Schwarz8, M. Krapesch1, Ph. Gmeiner1, M. Haimann1 With contributions from: M. Außendorf5, P. Bakonyi2, D. Balcheva-Makedonska9, V. Chendes10, A. Galie10, A. Jakus11, L. Javornik12, J. Józsa², T. Karagiozova13, B. Keri2, M. Lukac3, I. Mitrović14, K. Mravcova3, J. Muškatirović14, A. Pandele10, M. Reisenbüchler15, C. Rusu4, D. Singer5, P. Suhadolnik12, C. Trifu10 Affiliation: 1University of Natural Resources and Life Sciences, Vienna; 2Budapest University of Technology and Economics; 3Water Research Institute; 4National Administration “Romanian Waters”; 5Bavarian Environment Agency; 6Jaroslav Černi Institute for the Development of Water Resources; 7Croatian Waters; 8Fluvius; 9Executive Agency “Exploration and Maintenance of the Danube River”; 10National Institute of Hydrology and Water Management, Bucharest; 11General Directorate of Water Manage- ment; 12Institute for Water of the Republic of Slovenia; 13National Institute of Meteorology and Hydrology; 14Republic of Serbia, Ministry of Construction, Transport and Infrastructure, Directorate for Inland Waterways; 15Technical University of Munich Coordinated and published by: BOKU – University of Natural Resources and Life Sciences, Vienna, Institute of Hydraulic Engineering and River Research (IWA) Place and date: Vienna, November 2019 Cover image: © Philipp Gmeiner / IWA-BOKU UWZ_Vermerk_GmbH_4C_Umweltzeichen_Vermerk.qxd 31.05.13 08:02 Seite 1 Layout: Alexandra Schepelmann & Franz Tettinger / donaugrafik.at Printed by: Druckerei Janetschek GmbH, Brunfeldstraße 2, A-3860 Heidenreichstein Gedruckt nach der Richtlinie „Druckerzeugnisse“ des Österreichischen Umweltzeichens / gedruProducedckt nach de accordingr Richtlinie „D toru cthekerz austrianeugnisse“ Eco-Label criteria UZ 24 „low pollutant printed products“ des Österreichischen Umweltzeichens Druckerei Janetschek GmbH • UW-Nr. 637 Druckerei Janetschek GmbH · UW-Nr. 637 100 % Recyclingpapier / 100 % recycled paper Acknowledgements:gedruckt na chTheder Rauthorsichtlinie „ Dwouldrucker zlikeeug ntoiss thanke“ des ICPDR and all Associated Strategic Partners of the project Österreichischen Umweltzeichens DanubeSediment as well as our external stakeholders for their comments and valuable input to the Druckerei Janetschek GmbH · UW-Nr. 637 present document. This report is an output of the project Danube Sediment Management – Restoration of the Sediment Balance in the Danube River. DanubeSediment is co-funded by the European Union funds ERDF and IPA in the frame of the Danube Transnationalge dProgrammeruckt nach der (ProjectRichtlinie reference„Druckerzeu number:gnisse“ des DTP-1-1-195-2.1). The overall budget is: 3 558 581.62 Euros, where- Österreichischen Umweltzeichens · Druckerei Janetschek GmbH · UW-Nr. 637 by the ERDF contributes 2 827 421.16 Euros and the IPA contributes 197 373.19 Euros. Project duration: 01.01.2017–30.11.2019 gedruckt nach der Richtlinie Website: www.interreg-danube.eu/danubesediment „Druckerzeugnisse“ des Österreichischen Umweltzeichens RecommendedDru cformkerei Jofan ecitation:tschek Gm bH · UW-Nr. 637 Habersack H., Baranya S., Holubova K., Vartolomei F., Skiba H., Babic-Mladenovic M., Cibilic A., Schwarz U., Krapesch M., Gmeiner Ph., Haimann M. (2019). Danube Sediment Management Guidance. Output 6.1 of the Interreg Danube Transnational Project DanubeSediment co-funded gedrbyuck thet na cEuropeanh Commission, Vienna. der Richtlinie „Druckerzeugnisse“ des Österreichischen Umweltzeichens Druckerei Janetschek GmbH · UW-Nr. 637 www.interreg-danube.eu/danubesediment Project Introduction The Danube near Hainburg, Austria. (© Philipp Gmeiner / IWA-BOKU) Sediments are a natural part of aquatic systems. During Strengthening governance: One main project output is the past centuries, humans have strongly altered the the Danube Sediment Management Guidance (DSMG). Danube River. Riverbed straightening, hydropower It contains recommendations for reducing the impact dams and dykes have led to significant changes in the of a disturbed sediment balance, e. g. on the ecological sediment load. This sediment imbalance contributes to status and on flood risk along the river. By feeding into flood risks, reduces navigation possibilities and hydro- the Danube River Management Plan (DRBM Plan) and power production. It also leads to the loss of biodiversity the Danube Flood Risk Management Plan (DFRM Plan), within the Danube Basin. issued by the International Commission for the Protec- tion of the Danube River (ICPDR), the project directly To tackle these challenges, 14 project partners contributes to transnational water management and and 14 strategic partners came together in the flood risk prevention. DanubeSediment project. The partnership included numerous sectoral agencies, higher education institu- International Training Workshops supported the trans- tions, hydropower companies, international organisa- fer of knowledge to key target groups throughout the tions and nongovernmental organisations from nine Danube River Basin, for example hydropower, naviga- Danubian countries. tion, flood risk management and river basin manage- ment, which includes ecology. The project addressed Closing knowledge gaps: In a first step, the project these target groups individually in its second main team collected sediment transport data in the Danube project output: the Sediment Manual for Stakeholders. River and its main tributaries. This data provided the The document provides background information and foundation for a Danube-wide sediment balance that concrete examples for implementing good practice analysed the sinks, sources and redistribution of sedi- measures in each field. ment within the Danube – from the Black Forest to the Black Sea. In order to understand the impacts and risks DanubeSediment was co-funded by the European Union of sediment deficit and erosion, the project partners ERDF and IPA funds in the frame of the Danube Transna- analysed the key drivers and pressures causing sedi- tional Programme. Further information on the project, ment discontinuity. news on events and project results are available here: Ĭ www.interreg-danube.eu/DanubeSediment www.interreg-danube.eu/danubesediment Table of Contents Overview and key recommendations 6 1 Introduction 8 Statement of problems and needs 10 2 Increase of sediment transport capacity due to river regulation ..........................................11 Interruption of sediment continuity .....................................................................................................12 Further aspects ................................................................................................................................................14 Needs with respect to sediment management .............................................................................14 Sediment budget 15 3 Sediment transport ........................................................................................................................................15 Grain size distributions of the bed material ......................................................................................17 Dredging and feeding ..................................................................................................................................17 Bed level change .............................................................................................................................................18 Need for completion of sediment balance ........................................................................................19 Risk assessment ...............................................................................................................................................20 Suggestions for an improved monitoring 4 and data management 21 Suspended sediment and bedload transport ..................................................................................21 Bed material .......................................................................................................................................................23 Dredging and feeding ..................................................................................................................................24 Floodplain sedimentation ..........................................................................................................................24 Bathymetry measurements .......................................................................................................................25 Danube-wide sediment data management .....................................................................................26 Sediment transport modelling ................................................................................................................27 Practical measures 28 5 Selection of suitable measures ................................................................................................................28 Types of measures ...........................................................................................................................................30 Key question – 6 Significant Water Management Issue 34 Recommendations 36 7 General recommendations ........................................................................................................................36 Recommendations for the different