@conference {klar2004c, title = {Simultaneous 3D PTV and micro-pressure sensor equipment for flow analysis in subsurface gravel layer}, booktitle = {Proc. of River Flow 2004}, year = {2004}, pages = {703--712}, publisher = {A. A. Balkema Publishers}, organization = {A. A. Balkema Publishers}, author = {Michael Klar and Markus Jehle and Detert, M. and G. H. Jirka and Bernd J{\"a}hne and H.-J. K{\"o}hler and Wenka, T.} }