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Investigation of re-suspended sediment and it´s influence on the oxygen content in river stretches

Investigation of re-suspended sediment and it´s influence on the oxygen content in river stretches
type:Masterarbeit
time:From now on
tutor:

Stephan Hilgert

Zusatzfeld:

Führerschein, Feldarbeit, Umgang mit ArcGIS, möglichst gewässerökologisches Vorwissen, Arbeit kann auf Wunsch auch auf engl. Verfasst werden

Description

Due to deficits in the saprobic assessment of wide stretches of tributaries in the upper Rhine valley, north of Karlsruhe, the potential ecological reasons have to be closely investigated.
Next to studies about the habitat structure, the influence of discharge from waste water treatment plants and combined sewer overflows as well as a long-term oxygen monitoring, investigations of the re-suspension of cohesive sediment will be conducted. The focus of the research will be the effect of resuspended fine material on the short- and mid-term oxygen consumption in the river. In parallel to the in-situ experiments for remobilization, laboratory experiments for sediment-oxygen consumption will be conducted.
The results should be analyzed and interpreted in the context of the specific river ecology and flow dynamic. Objective is the improved understanding of fine sediment deposits and their potential influence on the oxygen budget of rivers and moreover on the macroinvertebrate community.
This work will be conducted in the framework of a running research project of the Karlsruhe City Council.

Task

The work encompasses the assistance during field experiments, and laboratory experiments of oxygen consumption as well as the corresponding analysis and interpretation of the created data. If possible, a simplified model can be set up to calculate the oxygen demand in some river stretches. All results should be interpreted in the context of the saprobic deficit.