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Knut Krämer

Doctoral Students

Group: 

Coastal Dynamics

Phone: 

+49 421 218-65582

Email:

Room: 

FVG-Ost 0050

Knut Krämer

In-situ observations of small scale bedform dynamics in the German Bight

In my PhD project, I in­ves­ti­ga­te the pro­per­ties and dy­na­mics of bed­forms in ti­d­al en­vi­ron­ments in the Ger­man Bight. To cap­tu­re the for­cing hydro­dy­na­mics and the re­s­pon­se of the sea floor, we de­ploy au­to­no­mous lan­der sys­tems equip­ped with a num­ber of de­vices mea­su­ring for ex­amp­le flow ve­lo­ci­ty, tur­bu­lence and the de­ve­lop­ment of the small sca­le ba­thy­me­try. In com­bi­na­ti­on with se­di­ment sam­ples, the­se pa­ra­me­ters are eva­lua­ted with re­gard to the thres­hold of bed­form for­ma­ti­on and mi­gra­ti­on.

The in­sights gai­ned from the field mea­su­re­ments will be used to un­der­stand the dy­na­mics of bed­forms in co­as­tal en­vi­ron­ments, their in­ter­ac­tion with hy­drau­lics and their im­pli­ca­ti­ons for pro­ces­ses in the bent­hic ha­bi­tat.

small scale bedform dynamics
Impressions from cruises with R/V Heincke

Publications

Peer Reviewed

 
Krämer, K., Holler, P., Herbst, G., Bratek, A., Ahmerkamp, S., Neumann, A., Bartholomä, A., van Beusekom, J.E.E., Holtappels, M., Winter, C., 2017. Abrupt emergence of a large pockmark field in the German Bight, southeastern North Sea. Scientific Reports 7, 5150. doi:10.1038/s41598-017-05536-1. Link PDF

 

Ahmerkamp, S., Winter, C., Krämer, K., Beer, D. de, Janssen, F., Friedrich, J., Kuypers, M.M., Holtappels, M., 2017. Regulation of benthic oxygen fluxes in permeable sediments of the coastal ocean. Limnology and Oceanography.

 

Krämer, K., Winter, C., 2016. Predicted ripple dimensions in relation to the precision of in situ measurements in the southern North Sea. Ocean Science 12. Link PDF

 

Conference Proceedings

Horstmann, N., Krämer, K., Goseberg, N., Schlurmann, T., 2013. In-situ Messungen schiffsinduzierter Wellenausbreitung und -reflexionen im Bremer Europahafen, in: 9. FZK-Kolloquium - Modellierung Im Seebau Und Küsteningenieurwesen. Forschungszentrum Küste, Hannover.

 

 Krämer, K., Zorndt, A., Lojek, O., Goseberg, N., Schlurmann, T., 2013. Feldmessungen von Geschwindigkeit und Turbulenz unter Probestaubedingungen am Emssperrwerk, in: 9. FZK-Kolloquium - Modellierung Im Seebau Und Küsteningenieurwesen. Forschungszentrum Küste, Hannover.

 

Krämer, K., Zorndt, A., Wurpts, A., Schlurmann, T., 2011. Strömungsmessungen zur Bestimmung der Sedimentdynamik im Juister Hafen, in: 8. FZK-Kolloquium - Maritimer Wasserbau Und Küsteningenieurwesen. Forschungszentrum Küste, Hannover.

 

Krämer, K., Wurpts, A., 2010. Development and Application of a New Post Processing Environment for Vessel Mounted ADCP Measurements, in: Proceedings of the Chinese-German Joint Symposium on Hydraulic and Ocean Engineering. Tianjin, China

 

Poster Presentations

Krämer, K., Winter C., 2016. Field Measurements of Small Scale Bedform Dynamics in the German Bight, Marine and River Dune Dynamics Conference V. Bangor, North Wales.

 

 Saalbach, J., Zorndt, A., Krämer, K., Schlurmann, T., 2012. Reducing siltation in the Juist marina - Identification of sediment transport mechanisms by in situ measurements and evaluation of constructional measures using numerical modelling, 33rd International Conference on Coastal Engineering (ICCE). Santander, Spain.

 

Krämer, K., Wu, L.-C., Kao, C., Schlurmann, T., 2010. Analysis of typhoon waves off the shores of northern Taiwan by EEMD method, 15th International Biennial Conference on Physics of Estuaries and Coastal Seas. Colombo, Sri Lanka.

Curriculum Vitae