Experiments to boost the ecological quality of the Markermeer and IJmeer water

‘Reef balls’ and an artificial marsh island. These are examples of field experiments Rijkswaterstaat is performing to boost the ecological development of the Markermeer and IJmeer. Nature is not doing well in this internationally significant nature reserve. With the Natural Markermeer-IJmeer research programme, together with its partners, Rijkswaterstaat is investigating how to make the Markermeer-IJmeer healthier, in terms of ecology.