Charakteristika des Sedimenttransports in einem kleineinzugsgebiet der Aragonesischen Pyrenäen.

  1. Seeger, M. 2
  2. Errea, M.-P. 3
  3. Lana-Renault, N. 3
  4. Beguería, S. 4
  5. Arnáez, J. 1
  6. Martí, C. 3
  7. Regüés, D. 3
  8. García-Ruiz, J.-M. 3
  1. 1 Universidad de La Rioja
    info

    Universidad de La Rioja

    Logroño, España

    ROR https://ror.org/0553yr311

  2. 2 University of Trier
    info

    University of Trier

    Tréveris, Alemania

    ROR https://ror.org/02778hg05

  3. 3 Instituto Pirenaico de Ecología
    info

    Instituto Pirenaico de Ecología

    Zaragoza, España

    ROR https://ror.org/039ssy097

  4. 4 Utrecht University
    info

    Utrecht University

    Utrecht, Holanda

    ROR https://ror.org/04pp8hn57

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Zeitschrift:
Zeitschrift für Geomorphologie

ISSN: 0372-8854

Datum der Publikation: 2005

Ausgabe: 138

Nummer: 138

Seiten: 211-228

Art: Artikel

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SCOPUS: 2-s2.0-33645521579 GOOGLE SCHOLAR

Andere Publikationen in: Zeitschrift für Geomorphologie

Zusammenfassung

The transport of suspended sediment during a stormflow event is very variable. The resulting hysteretic loop of the relationship of the discharge and suspended sediment concentration is used in the present paper to classificate rainfall-runoff-events and identify by canonical discriminant analysis the factors determining the different event types. The analysis of 19 events in a headwater catchment of the Central Pyrenees leads to the identification of 3 types of floods. A majoritary with clockwise shaped hysteretic loop, a second one with anti-clockwise shaped hysteretic loop and a third group with eight shaped hysteretic loop. The most important factor for generating different types of events is the soil moisture in the catchment. On a secondary level, total rainfall amount and precipitation of the 3 days before are important. So, the different flood types are generated with different contributing areas or by different processes. Clockwise shaped events have limited sources of suspended sediment near the channel with limited supply. Anti clockwise shaped events lead sediments from all over the catchment to the ravine. Eight-shaped events are produced under dry conditions, when rainfall intensity exceeds infiltration capacity, so sediments sources may be localised all over the catchment, but their connection to the fluvial network is stoped rapidly with decreasing precipitation. © 2005 Gebrüder Borntraeger.