This thesis was carried out as part of the project “Donau Stauraum Freudenau ecosystem response 15 years after construction” of the hydropower plant. With the completion of the power plant Freudenau environmental regulations came into force, which prescribe the temporal and spatial monitoring of the distribution of benthic communities and fish biocenosis. Furthermore the functionality of the implemented measures after the construction of the impoundment needs to be tested. The intention of this thesis is to analyze the temporal and spatial changes of habitat structures through on-site surveys by measuring the spatial expansion and variability of the structures. The main focus of the investigation is on capturing the sedimentation of fine material in each habitat. During the practical outdoor work on the Danube several methods were tested to acquire the optimal methodology for the research topic. Each habitat was explored by boat. Applying a distance measuring device and a selfmade dipstick, 55 cross sections were created with a total of 315 measuring points to illustrate the length, width and depth of the habitats. From the acquired data, the thickness of the sediment cover, which accumulated in the course of time in the respective bank structures, could be determined. Additionally the data was converted into a visually presentable form by means of computer-assisted programs. By evaluating the data of the investigated sections of the Danube habitats a conclusion on their development, with special emphasis on the sedimentation of fine materials, could be drawn. It turned out that it had come since its flooding in 1998 in each habitat to an accumulation of fine sediment. Throughout the percentage at the end of the central congestion or in the transition region this accumulation was the highest. Taking these results into account the paper discusses further ecological aspects and their eventual development.