]> 2026-04-21T01:00:13+00:00 Case study:Boldersbeek 500 en Draft Waterschap Rijn en Ijssel Central Plains Yes No Yes true No Researchers of Alterra (now Wageningen Environmental Research) state that the basins would not have ondergone such rapid plant succession if they had been made a bit deeper. 52.001858387939,6.7760451121095 John Waterschap Rijn en Ijssel Lenssen ,, ,,, The ecology of the main stream has improved, but bank vegetation did not respond as intended. The banks turned out to be too narrow and too steep, leaving very little room for an adapted vegetation to develop. The retention basins are prone to getting filled in with vegetation and sediment. They require a lot of maintenance just to prevent them from turning into carrs (Dutch: elzenbroekbos) through plant succession. This makes the basins less suitable for water retention. However, some of the carrs that have started to grow are in fact desirable and contribute to a more varied landscape. 26272 Complete The Boldersbeek is a small tributary of the Groenlose Slinge. In 1999, two retention basins were created in this stream's catchment. The stream flows through one of these basins and next to the other basin. Boldersbeek boldersbeek No Rijndelta Rijn Berkel berkel Boldersbeek boldersbeek 100 - 1000 km² 23 Less than 100 m Berkel NL07_0016 Environmental flows and water resources Flood risk management Habitat and biodiversity Water quality R5 NL07_0020 Groenlose Slinge 2021-02-03T14:00:18Z 2459249.0835417 2021-02-09T10:05:56Z 2459254.920787 Boldersbeek 500 1 plainlist 5 [[Category:Case study]] [[Project title::!Boldersbeek]] [[Subcatchment title::Berkel]] Boldersbeek# QUERY5d638acbd2b065c03de5a0b182a9fe23