Investigating river-restoration-effects on riverbed-stability by physical modelling
Autor:in (Körperschaft)
Publikationsdatum
17.04.2024
Typ der Arbeit
Studiengang
Sammlung
Typ
06 - Präsentation
Herausgeber:innen
Herausgeber:in (Körperschaft)
Betreuer:in
Übergeordnetes Werk
Themenheft
DOI der Originalpublikation
Link
Reihe / Serie
Reihennummer
Jahrgang / Band
Ausgabe / Nummer
Seiten / Dauer
Patentnummer
Verlag / Herausgebende Institution
Verlagsort / Veranstaltungsort
Wien
Auflage
Version
Programmiersprache
Abtretungsempfänger:in
Praxispartner:in/Auftraggeber:in
Zusammenfassung
This study shows how experimental results provide fundamental insights in the challenge of river revitalisation, and thus represent a powerful tool to guide engineers’ actions. Results concerns a study case, namely the “Wiese Vital” project, a restoration project in Basel area (Switzerland), with the objectives of safeguarding Basel's drinking water supply while revitalizing its watercourse and providing flood protection.
The planned revitalisation measures involve the reconstruction of the Wiese riverbed, the introduction of structures to improve its morphological variability and the replenishment of fine sediment to improve the spawning habitat of native fishes.
The new Wiese riverbed will consist of a coarser sediment layer, about 1.2 meters deep, overlaying a layer of finer sediments, meant to protect the underlaying aquifer from undesirable water infiltrations and thus to ensure Basel's drinking water supply safety. The stability of the coarser layer was investigated using a physical model in scale 1 to 20, built in the hydraulic hall of the University of Applied Sciences and Arts Northwestern Switzerland.
Experiments investigated the stability of the coarse protective layer in presence and in absences of revitalization measures: with and without “ecological” structures and before and after the addition of fine sediments.
Results revealed that wrong placement of “ecological” structures can cause local erosion and threaten the stability of the riverbed. Moreover, they provided useful insights on the response of a coarser riverbed to the input of fine sediments.
Schlagwörter
Flood protection, Riverbed stability, Hydraulic modelling, River revitalisation
Fachgebiet (DDC)
624 - Ingenieurbau und Umwelttechnik
Veranstaltung
EGU General Assembly 2024
Startdatum der Ausstellung
Enddatum der Ausstellung
Startdatum der Konferenz
14.04.2024
Enddatum der Konferenz
19.04.2024
Datum der letzten Prüfung
ISBN
ISSN
Sprache
Englisch
Während FHNW Zugehörigkeit erstellt
Ja
Zukunftsfelder FHNW
Publikationsstatus
Begutachtung
Keine Begutachtung
Open Access-Status
Lizenz
Zitation
UNRAU, Silas, Sara VENULEO, Guido DERUNGS und Henning LEBRENZ, 2024. Investigating river-restoration-effects on riverbed-stability by physical modelling. EGU General Assembly 2024. Wien. 17 April 2024. Verfügbar unter: https://doi.org/10.26041/fhnw-9205