The site comprises 10 km stretch of a stream valley managed as a private nature/state reserve some 17 kilometer North of the city of Hasselt. Since 1995,the restoration projects are carried out aiming at restoring the fen/carr ecosystem. Monitoring of the ground- and surface water dynamics and chemistry, the vegetation evolution is carried out by INBO.

The site comprises 4 km stretch of a complete alluvial floodplane managed as a private nature reserve some 10 kilometer upstream of the city of Leuven. Since 1990, human interference in the river channel has stopped resulting in a spontaneous meander evolution and roughening of the river channel. This has induced frequent (e.g. yearly) inundations, thus avoiding flood damage in the city of Leuven downstream and this without creating the usual storm basins.