Bedload pulses in a hydropower affected alpine gravel bed river

Aigner, Johann; Kreisler, Andrea; Rindler, Rolf; Hauer, Christoph; Habersack, Helmut

doi:10.1016/j.geomorph.2016.05.015

Cited by 30 publications

(33 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Mängel und Einschränkungen einzelner Messmethoden werden damit ausgeglichen. In Österreich werden hochmoderne Messstellen von der Universität für Bodenkultur Wien (BOKU) (Aigner et al 2017;Habersack et al 2017;Kreisler et al 2017;Liedermann et al 2013) betrieben. Auch die an Österreichs Flüssen angewandte Schwebstoffmonitoringstrategie besteht aus diesen Gründen aus einer Kombination von direkten und indirekten Messmethoden (BMLFUW 2008(BMLFUW , 2017Haimann et al 2014 Das verbesserte Verständnis der Auswirkungen kurz-und langfristiger Einflüsse auf die Flussmorphologie und das Sedimentbudget können dazu beitragen, die Planungskriterien für nach-Abb.…”

Section: Abstract Bedload Transport • Extreme Events • Sediment Transunclassified

See 1 more Smart Citation

Forschung zu alpinen Sedimentprozessen als Basis für ein verbessertes Feststoffmanagement unter Berücksichtigung extremer Ereignisse

Liedermann

Aigner

Kreisler

et al. 2019

Österr Wasser- und Abfallw

Self Cite

View full text Add to dashboard Cite

lichten die Vulnerabilität der Gesellschaft gegenüber derartigen Ereignissen. Die Gewässergeometrie reagiert bei starken Hochwässern mit massiven morphologischen Umlagerungen. Häuser und Infrastruktureinrichtungen in den betroffenen Gebieten sind somit in Gefahr. Daher ist ein verbessertes Verständnis der Sedimenttransportprozesse zentral für die Analyse der Morphodynamik und damit für das Hochwasserrisikomanagement. Sedimentmonitoring soll ein verbessertes Prozessverständnis bringen, doch beziehen sich bisherige Analysen primär auf die Flussabschnitte, an denen die jeweiligen Daten erhoben wurden. Das Projekt RAISE zielt nun auf die Kombination von Langzeit-mit Kurzzeit-Sedimentforschung (z. B. Extremhochwässer) ab, um diese Daten erstmals in Beziehung zu setzen und integrativ zu diskutieren. Erste Analysen brachten ein verbessertes Prozessverständnis variabler Transportverhältnisse durch die Definition von Geschiebetransport-Prozesstypen. Diese Klassifizierung hilft in der

show abstract

Section: Abstract Bedload Transport • Extreme Events • Sediment Transunclassified

“…Laufzeit von 38 Geschiebepulsen in Abhängigkeit vom mittleren Durchfluss an der Geschiebemessstation Lienz/Drau im Zeitraum 2001 bis 2015. Je größer und länger ein Durchflussereignis ist, desto schneller wird ein Geschiebepuls flussab transportiert (adaptiert nachAigner et al 2017) …”

unclassified

Forschung zu alpinen Sedimentprozessen als Basis für ein verbessertes Feststoffmanagement unter Berücksichtigung extremer Ereignisse

Liedermann

Aigner

Kreisler

et al. 2019

Österr Wasser- und Abfallw

Self Cite

View full text Add to dashboard Cite

show abstract

“…Alternative measuring techniques are indirect methods such as acoustic bed load monitoring in gravel bed streams. The interest in these methods has grown considerably in the last decade or so (Gray et al, ; Rickenmann, ), and an increasing number of related, process‐oriented studies have been published (Aigner et al, ; Beylich & Laute, ; Downs et al, ; Habersack et al, ; Kreisler et al, ; Magirl et al, ; Mao et al, ; Mizuyama et al, ; Raven et al, ; Reid et al, ; Rickenmann, ; Rickenmann & McArdell, ; Schneider et al, ; Turowski et al, ; Uchida et al, ; Vatne et al, ). These indirect techniques have the important advantage of providing continuous measurements in time.…”

Section: Introductionmentioning

confidence: 99%

“…Many previous studies investigated hysteresis effects in the relationship between sediment transport rate and flow strength, which occur over different timescales from hours to years. Hysteresis can be clockwise (higher transport on rising hydrograph limb; e.g., Mao et al, ; Moog & Whiting, ; Nanson, ; Schneider et al, ; Vatne et al, ) or counterclockwise (higher transport on falling hydrograph limb; e.g., Aigner et al, ; Emmett et al, ; Klingeman & Emmett, ; Mao et al, ; Milhous & Klingeman, ). Possible reasons for hysteresis behavior were recently summarized by Roth et al (): exhaustion or increases in sediment supply (e.g., Mao et al, ; Moog & Whiting, ; Reid et al, ; Whiting et al, ) or changes in transport efficiency due to bed evolution, such as packing (e.g., Charru et al, ; Mao, ) or changes in the grain size of the bed surface (e.g., Dietrich et al, ; Humphries et al, ; Kuhnle, ; Martin & Jerolmack, ; Whiting et al, ; Wohl & Cenderelli, ).…”

Section: Introductionmentioning

confidence: 99%

Variability of Bed Load Transport During Six Summers of Continuous Measurements in Two Austrian Mountain Streams (Fischbach and Ruetz)

Rickenmann

2018

Water Resources Research

View full text Add to dashboard Cite

Previous measurements of bed load transport in gravel bed streams revealed a large temporal and spatial variability of bed load transport rates. Using an impact plate geophone system, continuous bed load transport measurements were made during 6 years in two mountain streams in Austria. The two streams have a snow‐melt and glacier‐melt dominated hydrologic regime resulting in frequent transport activity during the summer half year. Periods of days to weeks were identified which are associated with approximately constant Shields values that indicate quasi‐stable bed conditions. Between these stable periods, the position of the bed load transport function varied while its steepness remained approximately constant. For integration time scales of several hours to 1 day, the fluctuations in bed load transport decreased and the correlation between bed load transport and water discharge increased. For integration times of about 70–100 days, bed load transport is determined by discharge or shear stress to within a factor of about 2, relative to the 6 year mean level. Bed load texture increased with increasing mean flow strength and mean transport intensity. Weak and predominantly clockwise daily hysteresis of bed load transport was found for the first half of the summer period.

show abstract

“…Unsteady flow events are intensive phenomena occurring in streams and rivers in various climatic and geomorphic settings [1]. They can be triggered by snowmelts [2], glacial processes, excessive rainfall, dam water releases, or hydropower operations [3,4] and very often entail catastrophic consequences, falling into the category of flood events. Unsteady flows differ in terms of frequency, magnitude, and hydrograph shape and duration, depending on the region and flood origin.…”

Section: Introductionmentioning

confidence: 99%

Impact of Unsteady Flow Events on Bedload Transport: A Review of Laboratory Experiments

Mrokowska

Rowiński

2019

Water

View full text Add to dashboard Cite

Recent advances in understanding bedload transport under unsteady flow conditions are presented, with a particular emphasis on laboratory experiments. The contribution of laboratory studies to the explanation of key processes of sediment transport observed in alluvial rivers, ephemeral streams, and river reaches below a dam is demonstrated, primarily focusing on bedload transport in gravel-bed streams. The state of current knowledge on the impact of flow properties (unsteady flow hydrograph shape and duration, flood cycles) and sediment attributes (bed structure, sediment availability, bed composition) on bedload are discussed, along with unsteady flow dynamics of the water-sediment system. Experiments published in recent years are summarized, the main findings are presented, and future directions of research are suggested.

show abstract

Bedload pulses in a hydropower affected alpine gravel bed river

Cited by 30 publications

References 36 publications

Forschung zu alpinen Sedimentprozessen als Basis für ein verbessertes Feststoffmanagement unter Berücksichtigung extremer Ereignisse

Forschung zu alpinen Sedimentprozessen als Basis für ein verbessertes Feststoffmanagement unter Berücksichtigung extremer Ereignisse

Variability of Bed Load Transport During Six Summers of Continuous Measurements in Two Austrian Mountain Streams (Fischbach and Ruetz)

Impact of Unsteady Flow Events on Bedload Transport: A Review of Laboratory Experiments

Contact Info

Product

Resources

About