Room for the River is the lead partner for two EU projects, subsidised in the INTERREG IVB NWE programme. These are FloodResilienCity (FRC) and Adaptive Land Use for Flood Alleviation (ALFA). By participating in these EU projects, Room for the River hopes to learn from the experience and knowledge of European Partners with similar problems, and also share our own knowledge with these partners.

Depoldering of Overdiepse Polder

The Overdiepse Polder has undergone a metamorphosis that started in 2011. The majority of the farms in the Overdiepse Polder is removed and rebuilt on dwelling mounds (terps) along a new dyke to protect the farmhouses from high water levels, while providing more room for the river.

Once the farms were rebuilt on the dwelling mounds, the dyke on the north side of the polder was lowered. A new primary dyke is built along the river Oude Maasje and is a mirror image of the old dyke on the north side of the polder. The river water will flow into the polder on an average of once every 25 years. This will lower the high water level in the river Bergse Maas by approximately 27 cm at the location of the Overdiepse Polder. This reduction of the water level will also have an effect on water levels far upstream from the polder.

Plan developed by residents

The Overdiepse Polder is a special project, as the polder's residents and farmers jointly sought information about the development during an early planning stage and provided the final solution: the 'dwelling mounds plan' (terp plan). The Province of Noord-Brabant worked out the terp plan in more detail in collaboration with the relevant authorities, a group of consultancies and a highly-active working group from the Overdiepse Polder interest group.

The government asked the Brabantse Delta Water Authority to manage the implementation of the project. Now that the project has been completed, cyclists and hikers are able to make a roundtrip on the new paths built around the polder. The Minister attended the official delivery of the Overdiepse terps in September. By the end of 2015, the new Overdiepse Polder will be available for sustainable agricultural use and more room will be made available for the discharge of water from the river Maas.

Infographic Rivierverruiming Overdiepse Polder


Depoldering of Overdiepse Polder

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Water Farm (Deventer)

In the area to the north of the city of Deventer, the current landscape – a combination of agricultural land and nature areas – will be maintained and reinforced by the excavation of extra channels. The plan will give the ‘Natuurderij’ built by the Ijssel Landscape Foundation a more prominent place in the area. This ecological water farm plays an important role in managing the vegetation in the floodplains by allowing cattle to graze there, so that the water can continue to flow through the area unimpeded in the future.

Visitors are welcome to experience water management in Holland in the Natuurderij education centre. Keizersrande hopes it will raise awareness of the necessity of water management among the visitors, as well as explain how important this farm is for water storage and discharge.

Visit this website for more information.

Room for the river Waal

The river Waal makes a sharp bend near Nijmegen, where it also narrows to form a bottleneck. That the river may flood at high water as a result became clearly evident in 1993 and 1995. Adequate measures were necessary in order to protect the inhabitants of the city against the threat posed by high water.

In the case of Nijmegen, this involved moving the Waal dyke near Lent and constructing an ancillary channel in the flood plains. This will create an island in the Waal and a unique urban river park in the heart of Nijmegen, with room for housing, recreational activities, culture, water and nature.

Dyke relocation
Relocating a dyke land inwards increases the width of the floodplains and provides more room for the river.

The planning
The actual digging started in 2013. The relocation of the dyke, the construction of the ancillary channel and the raising of the island will all be realised in 2016 The area will be further developed in the years following to allow for recreation, housing facilities and other urban functions. The Minister will deliver the project in December 2015.