dot
Detailansicht
Katalogkarte GBA
Katalogkarte ISBD
Suche präzisieren
Drucken
Download RIS
Hier klicken, um den Treffer aus der Auswahl zu entfernen
Titel Sediment deposition modelling and virtual coring in a high alpine lake
VerfasserIn Tristan Martel, Marco van de Wiel
Konferenz EGU General Assembly 2010
Medientyp Artikel
Sprache Englisch
Digitales Dokument PDF
Erschienen In: GRA - Volume 12 (2010)
Datensatznummer 250036945
 
Zusammenfassung
Sediment deposition by turbidity current processes has been modeled in a high alpine lake setting. Virtual sediment core extraction reveals grain-size and layer thickness at pre-defined locations in the sediment fan. The newly developed Lake Sediment Deposition Model utilizes an event-based iterative structure to drive distinct short lived intense inflows, or long durations of base flow, treated as single instantaneous events. Bulk quantities of sediment placed in grain size categories and discharge rates from the river mouth are used as inputs. Results show how lake sediment laminae accumulate, with distinct variations in layer thickness and grain-size sequences . The model is also sensitive to the effects that the existing and evolving bed topography have on subaqueous turbidity current routing and the location where sediment plume formation occurs. The model and virtual coring could provide an improved understanding of real world lake sediment transportation dynamics, and the inferences based upon lake sediment cores.