How can you manage and design rivers such that no floods occur, whilst still ensuring navigation for shipping and a continuation of the agricultural, ecological and recreational functions? Dutch researcher Saskia van Vuren discovered that uncertainties in the behaviour of the riverbed play an important role in predicting the effects of design measures, such as lowering floodplains.
In view of future large-scale projects, such as river improvement measures in the project 'Ruimte voor de rivier' [Room for the River], the societal relevance of responsible river management is increasing.
The large-scale spatial redesigning of the Rhine Branches could result in greater dynamics in the riverbed, which could give rise to more problems for shipping. That might lead to increasing costs for maintenance dredging. Moreover an increase in the riverbed dynamics might also affect the high-water levels. Saskia van Vuren investigated the uncertainty in riverbed dynamics.
Changes in the riverbed elevation can give rise to high-water problems and flooding, drought problems which hinder shipping, problems with respect to the discharge distribution at bifurcation points, and erosion problems.
Fluctuations in the groundwater level caused by these so-called morphological changes can exert an influence on the local ecology and agriculture. In her thesis, Van Vuren uses examples to illustrate how insights into the uncertain behaviour of the riverbed can support managers in the design, management and maintenance of the river.
A closer look at the Rhine
