University of Natural Resources and Life Sciences Vienna Department of Water, Atmosphere and Environment Sediment management along rivers in Austria I Helmut Habersack Sediment management along rivers in Austria H. HABERSACK Christian Doppler Laboratory for Advanced Methods in River Monitoring, Modelling and Engineering, University of Natural Resources and Life Sciences, Vienna
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University of Natural Resources and
Life Sciences Vienna
Department of Water, Atmosphere and
Environment
Sediment management along rivers in Austria I Helmut Habersack
Sediment management along rivers in Austria
H. HABERSACKChristian Doppler Laboratory for Advanced Methods in River Monitoring, Modelling and Engineering, University of Natural
Resources and Life Sciences, Vienna
University of Natural Resources and
Life Sciences Vienna
Department of Water, Atmosphere and
Environment
Sediment management along rivers in Austria I Helmut Habersack
� Role of sediments in water management
� River Scaling Concept and sediment regime
� Sediment management along rivers in Austria - examples
� Sediment transport monitoring and modelling
� Conclusions
Contents
University of Natural Resources and
Life Sciences Vienna
Department of Water, Atmosphere and
Environment
Sediment management along rivers in Austria I Helmut Habersack
Sediments have centralfunctions in rivers
� Development of the river bed and morphodynamics
� Prerequisite for the minimization of negative trends (e.g. river
Sediment management along rivers in Austria I Helmut Habersack
River Restoration at Gosdorf
• 1 km length restored
• Removal of bank protection structures
• Dredging of new side arms
• 150 000 m³ immediate sediment input
Measures:
Aims:mitigating channel incision by:
• added sediment
• further sediment input originating from riverbank erosion
• increased width – decreased transport capacity
University of Natural Resources and
Life Sciences Vienna
Department of Water, Atmosphere and
Environment
Sediment management along rivers in Austria I Helmut Habersack
13.02.2012
24
Example Danube East of Vienna
University of Natural Resources and
Life Sciences Vienna
Department of Water, Atmosphere and
Environment
Sediment management along rivers in Austria I Helmut Habersack
River bed degradation
W. Reckendorfer, R. Schmalfuss, C. Baumgartner, H. Habersack, S. Hohensinner , M. Jungwirth, F. Schiemer
University of Natural Resources and
Life Sciences Vienna
Department of Water, Atmosphere and
Environment
Sediment management along rivers in Austria I Helmut Habersack
Artificial bedload input
Schimpf, Verbund
University of Natural Resources and
Life Sciences Vienna
Department of Water, Atmosphere and
Environment
Sediment management along rivers in Austria I Helmut Habersack
Artificial bedload supply
Schimpf, Verbund
University of Natural Resources and
Life Sciences Vienna
Department of Water, Atmosphere and
Environment
Sediment management along rivers in Austria I Helmut Habersack
River bed development 2005-2009
Habersack, Liedermann, Tritthart, 2010
� 635.000 m³ bedload output without supply
� Mean bed level difference(Strom-km 1880,0 – 1921,0):
� 1,9 cm/year (with supply)
� 4,2 cm/ year (without supply)
University of Natural Resources and
Life Sciences Vienna
Department of Water, Atmosphere and
Environment
Sediment management along rivers in Austria I Helmut Habersack
Problems/Measures
Problems
Measures
River bed
degradation,
Habitat structure
Minimum water
depth, River bed
degradation
Sidearm reconnection
Riverbank restoration
Low flow river regulation
Gravel redeposition
Granulometric bed improvement
Ecology Navigation
University of Natural Resources and
Life Sciences Vienna
Department of Water, Atmosphere and
Environment
Sediment management along rivers in Austria I Helmut Habersack
Reduce riverbed erosion by adding larger gravel
sizes (40 – 70 mm) within the natural grain size
spectrum � Granulometric Bed Improvement
Original stage I stage II
25
cm
GS
V
Mix
ed
ma
teri
al
University of Natural Resources and
Life Sciences Vienna
Department of Water, Atmosphere and
Environment
Sediment management along rivers in Austria I Helmut Habersack
Improve navigation conditions, particularly during
low flow periods, by raising water levels using
modified groyne shapes and riverbed adjustments
existing groynes
modified groynes
University of Natural Resources and
Life Sciences Vienna
Department of Water, Atmosphere and
Environment
Sediment management along rivers in Austria I Helmut Habersack
13.02.2012
32Hauer & Habersack, 2006Fotos: donauconsult, via donau
University of Natural Resources and
Life Sciences Vienna
Department of Water, Atmosphere and
Environment
Sediment management along rivers in Austria I Helmut Habersack
Nationalpark Donauauen
University of Natural Resources and
Life Sciences Vienna
Department of Water, Atmosphere and
Environment
Sediment management along rivers in Austria I Helmut Habersack
River Monitoring
Monitoring
Habersack, H.M. & Laronne, J. B.
(2002), J. Hydraulic Engineering,
Vol. 128, No. 5, 484‐‐‐‐499.
Habersack, H., Hauer, C.,
Liedermann, M., Tritthart, M.,
(2008), Water 21: 29-31.
Habersack, H.M, Nachtnebel, H.-
P, Laronne, J. B. (2001), J.
Hydraulic Research, Vol. 39/2,
125-133.
Habersack, H.M. & Laronne, J.B.
(2001), Water Resources
Research, Vol. 37, No. 12, 3359-
3370.
Smart, G.M., Habersack, H.M.
(2007), J. Hydraulic Research,
Vol: 45 / Issue: 5, 661–673.
Habersack, H.M., Seitz, H.,
Laronne, J.B. (2008), J.
Geodinamica Acta, 21/1-2, 67-79.
University of Natural Resources and
Life Sciences Vienna
Department of Water, Atmosphere and
Environment
Sediment management along rivers in Austria I Helmut Habersack
35
AUSTRIAN BED LOAD CONVEYOR
flow direction
bed-load traps
Integrated Bedload Monitoring Dellach/Drau
processing unit
bridge Dellach/Drautal
river gauging
Helley-Smith sampler
suspended load measurement
flow velocity meter
40 hydrophonesbed-loadflap
radiotracers
Admodus Sonar
Seitz & Habersack, 2007
University of Natural Resources and
Life Sciences Vienna
Department of Water, Atmosphere and
Environment
Sediment management along rivers in Austria I Helmut Habersack
Seitz & Habersack, 2007
University of Natural Resources and
Life Sciences Vienna
Department of Water, Atmosphere and
Environment
Sediment management along rivers in Austria I Helmut Habersack
University of Natural Resources and
Life Sciences Vienna
Department of Water, Atmosphere and
Environment
Sediment management along rivers in Austria I Helmut Habersack
River Modelling
3D-Hydrodynamics Flow field
Particle Tracing Sediment transport
� Suspended sed., bedload
� Lagrange‘ modelling by particle tracing
� Euler modelling by new sediment transport model
� ���� Habitat modelling
Tritthart, M; Liedermann, M; Schober,
B; Habersack, H (2011): J HYDRAUL
RES. 49(3) 335-344
Tritthart, M; Schober, B; Habersack, H
(2011): J HYDRAUL RES. 2011 49(3),
325-334
Tritthart, M., Liedermann, M.,
Habersack, H., (2009), River Research
and Applications, 25: 62-81.
Krapesch, G., Tritthart, M.,
Habersack, H., (2009), River Research
and Applications, 25: 593-606.
Habersack, H., Hauer, C.,
Liedermann, M., Tritthart, M., (2008),
Water 21: 29-31.
Hauer, C., Mandlburger, G.,
Habersack, H. (2009), River Research
and Applications, 25, 29-47.
University of Natural Resources and
Life Sciences Vienna
Department of Water, Atmosphere and
Environment
Sediment management along rivers in Austria I Helmut Habersack
Conclusions
� there exists a strong hierachical scale depending
relation concerning sediment transport � RSC
� many rivers have already reached or will reach in the coming years a critical state of morphodynamic development (e.g. river bed break-through)
� sediment continuum, transport and river morphodynamics play a central role in river management and need to be incorporated, from new hydropower types to river restoration
� we need to promote less design but more self forming river restoration or mitigated management procedures
� the second river basin management plan needs fundamental sediment research concerning processes and measures
University of Natural Resources and
Life Sciences Vienna
Department of Water, Atmosphere and
Environment
Sediment management along rivers in Austria I Helmut Habersack
13.02.2012
40
University of Natural Resources and Applied Life Sciences
Vienna
Department for Water, Atmosphere and Environment
Institute of Water Management, Hydrology and Hydraulic Engineering
Christian Doppler Laboratory for Advanced Methods in River