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| 1 | An integrated suspended sediment transport monitoring and analysis concept显示文摘A new integrated suspended sediment monitoring strategy applying direct and indirect technologies is presented.Optical sensors continuously record the turbidity at one point in the channel cross section close to the river bank and are calibrated by water samples taken close to the sensor.Additionally measurements are performed to establish the distribution of suspended sediment in a cross section(bottle samples combined with acoustic devices).Using correction factors(probe and cross-sectional factor) these monitoring methods are combined and it is,thus,possible to fully document the temporal and spatial variability of the suspended sediment transport and to estimate the suspended sediment load for certain time periods.This monitoring strategy was implemented at various measurement sites in Austria as well as at the Hainburg Road Bridge site on the Danube River.It has already been successfully applied for three years at this measurement site and suspended sediment loads during high discharges up to a 15 year flood event have been monitored.To evaluate the new monitoring methods the results were compared with load estimation methods found in the literature including averaging and ratio estimators as well as rating curves.The results prove that with the new methodology,the temporal variability of the suspended sediment transport can be detected more accurately compared with the other methods.They also demonstrate that the additional consideration of the spatial distribution of the suspended sediment concentration in the cross section is crucial as the mean concentration in the cross section can significantly exceed the concentration near the banks,especially at large rivers like the Danube River. | Marlene HAIMANN Marcel LIEDERMANN Petra LALK Helmut HABERSACK | 2014 | International Journal of Sediment Research2014，29，2： | 4 |
| 2 | Evaluation and improvement of bedload discharge formulas based on Helley-Smith sampling in an alpine gravel bed river显示文摘 | HABERSACK H.M LARONNE J.B | | 0，，05： | 1 |
| 3 | Pregnancy associated hormones modulate the cytokine production but not the phenotype of PBMC-derived human dendritic cells显示文摘 | HUCK B STECK T HABERSACK M et a1 | 2005 | Eur J Obstet Gynecol Re-prod Biol2005，122，： | 1 |
| 4 | On bed particle diffusion in gravel bed flows under weak bed load transport 显示文摘 | NIKORA V HABERSACK H HUBER T | 2002 | Water Resources Research2002，38，10816： | 1 |
| 5 | Short-term effects of local river restoration on morphology,flow field,substrate and biota显示文摘 | Habersack H Nachtnebel H | | 0，，： | 1 |
| 6 | On bed particle diffusion in gravel bed flows under weak bed load transport显示文摘 | NIKORA V HABERSACK H HUBER T | 2002 | Water Resources Research2002，38，6： | 1 |
| 7 | Reconstruction of the characteristics of a natural alluvial riverfloodplain system and hydromorphological changes following human modifications: The Danube River ( 1812- 1991 ) 显示文摘 | Hohensinner S Habersack H Jungwirth M | 2004 | River Research and Applications2004，20，1： | 1 |
| 8 | The river-scaling concept (RSC):a basis for ecological assessments显示文摘 | HABERSACK H M | 2000 | Hydrobiologia2000，，： | 1 |
| 9 | Morphodynamics of a 1000-year flood in the Kamp River,Austria,and impacts on floodplain morphology显示文摘 | HAUER C HABERSACK H | 2009 | Earth Surface Processes and Landforms2009，34，5： | 1 |
| 10 | Impact analysis of river morphology and roughness variability on hydro peaking based on unmerical modelling 显示文摘 | Christoph Haner Bernhard Schober Helmut Habersack | 2013 | Hydro- logical Processes2013，27，15： | 1 |
| 11 | Pregnancy associated hormones modulate the cytokine production but not the phenotype of PBMC-derived human dendritic cells显示文摘 | Huck B Steck T Habersack M | 2005 | Eur J Obstet Gynecol Reprod Biol2005，122，： | 1 |
| 12 | Pregnancy associated hormones modulate the cytokine production but not the phenotype of PBMC-derived human dendritic cells显示文摘 | Huck B Steck T Habersack M | 2005 | Eur J Obstet Gynecol Reprod Biol2005，122，1： | 1 |
| 13 | High-resolution multislice computerized tomography with multiplanar and 3-dimensional reformation imaging in rapid palatal expansion显示文摘 | Habersack K Karoglan A Sommer B | 2007 | Am J Orthod Dentofacial Orthop2007，131，6： | 1 |
| 14 | High-resolution mul- tislice computerized tomography with muhiplanar and 3-dimensional reformation imaging in rapid palatal expansion 显示文摘 | Habersack K Karoglan A Sommer B | 2007 | Am J Orthod Dentofacial Orthop2007，131，6： | 1 |
| 15 | Sediment loads and processes in large rivers显示文摘The pressure and impact on large rivers have increased greatly in recent years,as a consequence of their exploitation to meet various human needs.Large rivers are particularly exposed to problems of multiple uses,often with conflicting aims.At the global scale river systems are increasingly altered by dams,leading to interruption of continuity and a disrupted sediment regime,which results in far-reaching problems.These challenges point also to the need for more integrated management approaches and consideration of catchment-river interactions emphasizing land use management and effects of these uses.At the global scale,there is currently no overview assessment of the current status of the world’s large rivers,the conflicting demands on such rivers,and likely future anthropogenic impacts,as well as the potential for restoration,improvements in integrated management and the associated problems caused by their multiple uses.The special issue in the International Journal of Sediment Research on'Sediment loads and processes in large rivers'aims to provide a global forum for a wide-ranging discussion of key issues related to research on large rivers and to their effective and sustainable management,involving both scientists and decision makers.The sequence of papers in the special issue highlights the current situation in different river systems with regard to morphodynamic reactions | Helmut HABERSACK Daniel HASPEL | 2013 | International Journal of Sediment Research2013，28，4： | 0 |
| 16 | Physical model experiments for sediment supply to the old Rhine through induced bank erosion显示文摘A mobile-bed,undistorted physical model(1:40) has been used to investigate different sediment supply strategies to the Old Rhine through bank protection removal and modifications of groyne dimensions and configuration,which cause bank erosion.This trained channel was previously the main bed of the upper Rhine downstream of Basel(Switzerland),but it has an artificially low flow regime since the construction of the Grand Canal d'Aisace,a navigation canal,and a flow control dam at Kembs(France).Training works and subsequent channel incision have also greatly reduced sediment transport rates and created a heavily armoured bed.The modelled pilot site has a groyne field on the left bank.Results show that the currently existing groynes at the site are not effective in creating high bank-side velocities conducive to bank erosion,even for flow rates significantly higher than the mean annual How rate.The river bank has also proved to be more resistant than previously thought,allowing long stretches of bank protection to be safely removed.The physical model testing process has produced a new configuration for the groyne field,where two higher,larger island groynes are placed further apart than the three existing attached groynes.This innovative approach has proved effective,causing bank erosion for flow rates below the mean annual flow rate,with consistent erosion being observed.It has also been found that such a configuration does not pose a hazard for the Grand Canal d'Aisace,which is situated next to the Old Rhine,through excessive bank erosion during high flow events. | Andres DIE MORAN Kamal EL KADI ABDERREZZAK Erik MOSSELMAN Helmut HABERSACK Franck LEBERT Denis AELBRECHT Eric LAPERROUSAZ | 2013 | International Journal of Sediment Research2013，28，4： | 0 |
| 17 | Experimental investigation on local shear stress and turbulence intensities over a rough non-uniform bed with and without sediment using 2D particle image velocimetry显示文摘The current work focuses on locally resolving velocities,turbulence,and shear stresses over a rough bed with locally non-uniform character.A nonporous subsurface layer and fixed interfacial sublayer of gravel and sand were water-worked to a nature-like bed form and additionally sealed in a hydraulic flume.Two-dimensional Particle Image Velocimetry(2D-PIV)was applied in the vertical plane of the experimental flume axis.Runs with clear water and weak sediment transport were done under slightly supercritical flow to ensure sediment transport conditions without formation of considerable sediment deposits or dunes.The study design included analyzing the double-averaged flow parameters of the entire measurement domain and investigating the flow development at 14 consecutive vertical subsections.Local geometrical variabilities as well the presence of sediment were mainly reflected in the vertical velocity component.Whereas the vertical velocity decreased over the entire depth in presence of sediment transport,the streamwise velocity profile was reduced only within the interfacial sublayer.In the region with decelerating flow conditions,however,the streamwise velocity profile systematically increased along the entire depth extent.The increase in the main velocity(reduction of flow resistance)correlated with a decrease of the turbulent shear and main normal stresses.Therefore,effects of rough bed smoothening and drag force reduction were experimentally documented within the interfacial sublayer due to mobile sediment.Moreover,the current study leads to the conclusion that in nonuniform flows the maximum Reynolds stress values are a better predictor for the bed shear stress than the linearly extrapolated Reynolds stress profile.This is an important finding because,in natural flows,uniform conditions are rare. | Petr Lichtneger Christine Sindelar Johannes Schobesberger Christoph Hauer Helmut Habersack | 2020 | International Journal of Sediment Research2020，35，2： | 0 |
| 18 | Effective transport width——A methodology to describe the spatial variability of bedload transport显示文摘The monitoring of bedload transport processes in rivers is a still challenging task in research and the parameter effective transport width(ETW)allows,for the first time,a process description of the local variability of the bedload transport.In this paper,the distribution of bedload transport over a river crosssection was studied by statistically analyzing long-term monitoring data.Using an innovative integrated measurement system,combining geophones distributed over the river width with bedload traps and basket sampling,allows for continuous,high-resolution,long-term monitoring data of bedload transport characteristics to be generated.Geophone data can be used to record and describe bedload transport processes such as intensity,temporal variability,and local variability.One parameter observed was the ETW,which describes the width where bedload transport is taking place for different discharge classes in gravel bed rivers.With the help of a data series recorded over more than a decade,it is now possible,for the first time,to statistically describe the continuously and directly measured ETW.Hence,it became evident that the effective bedload transport width depends on the discharge rate and local transport capacity,and that bedload transport over the entire river width only occurs at high flows that prevail a few days a year. | Rolf Rindler Sabrina Schwarz Marcel Liedermann Dorian Shire-Peterlechner Andrea Kreisler Johann Aigner Michael Tritthart Helmut Habersack | 2023 | International Journal of Sediment Research2023，38，2： | 0 |
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