Recently, a significant increase in macrophyte growth has been observed in many lowland rivers in Flanders, mainly due to eutrophication and an improvement of the water quality. This growth strongly influences the channel roughness (Manning-n). The first purpose of the project was a better understanding of the complex relationship between biomass development and discharge capacity in lowland rivers. In order to avoid the backing up of water upstream, the whole vegetation body is usually mowed annually. This project also investigated a lighter ecological management of aquatic plants in which only a part of the vegetation is removed in separate and alternating blocks, seeking a compromise between sufficient discharge and conserving large parts of the macrophyte vegetation with all its functions. Beside laboratory experiments, field survey was undertaken in the Grote Caliebeek, a tributary of the Kleine Nete in Flanders, Belgium. The results indicated that the presence of macrophytes in lowland rivers slowed down the waterflow and resulted in a raised water level. The upstream water level followed biomass development at a certain discharge level. The mowing experiments and the field survey indicated that alternating weed cutting patterns can reduce fall in an effective way. This research emphasizes the possibilities of alternating weed cutting patterns in order to deal with water flow problems. In the long term there will be the need for a better understanding of the ecological relationships in the search for a sustainable integrated method of controlling aquatic vegetation.

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This book provides both students and scholars with a critical and historical introduction to the graphic novel. Jan Baetens and Hugo Frey explore this exciting form of visual and literary communication, showing readers how to situate and analyse graphic novels since their rise to prominence half a century ago. Several key questions are addressed: what is the graphic novel? How do we read graphic novels as narrative forms? Why is page design and publishing format so significant? What theories are developing to explain the genre? How is this form blurring the categories of high and popular literature? Why are graphic novelists nostalgic for the old comics? The authors address these and many other questions raised by the genre. Through their analysis of the works of many well-known graphic novelists - including Bechdel, Clowes, Spiegelman and Ware - Baetens and Frey offer significant insights for future teaching and research on the graphic novel.