On the erodibility of fine-grained sediments in an infilling freshwater system T.J. Andersen a, E. J. Houwing b & M. Pejrup ~ aInstitute of Geography, University of Copenhagen, Oster Voldgade 10, DK-1350 K~benhavn K, Denmark. bInstitute for Inland Water Management and Waste Water Treatment (RIZA), Rijkswaterstaat, van Leeuwenhoekweg 20, 3316 AV Dordrecht, The Netherlands The erodibility of fine-grained sediments from the Hollandsch Diep freshwater system has been measured using a portable EROMES system. The erosion experiments were carried out on natural sediment surfaces sampled with a box-corer. The measured erosion thresholds varied between 0.16 and 0.70 N m 2. The erosion thresholds were positively correlated to the dry density of the bed material (r 2 = 0.33) whereas no significant dependence was found on either grain size, organic content or chlorophyll a content. The measured erosion rates varied between 0.04 and 1.68 g m -2 s -1 and a strong positive correlation with bed ...