Deltawerken Online wordt mede gemaakt door:
Current projects
Some example projects of what is happening right now in the Netherlands:
The Woolde in Hengelo- The Woolde is a water storage area situated next to a residential district in Hengelo, in the east of the Netherlands. It is a fine example of a sustainable method to deal with water within an urban area. The water is stored in pools and carried away slowly. The water is also of great importance for nature areas and for recreation.
Rain water separation in Nijmegen- Currently, there is a project being conducted East of the Maas-Waal Channel on the separation of rainwater, where rainwater is absorbed by the ground instead of being drained into sewers. There are two advantages of this project: the ground water reserve is continually refreshed and topped up, and the water is not drained away too fast. The method of draining rainwater into sewers may cause excessively high water levels in nearby rivers. When sewer renovations are necessary, the maximum amount of rainwater which can infiltrate the ground is calculated. In addition to drainpipes, permeable pipes are installed under the streets; residents were asked to redirect rainwater from their roofs into the streets via gutters.
Lappenvoort, Glimmermade and the Oosterland- The water storage in the Lappenvoort, Glimmermade and Oosterland polders is part of the Recovery Lower Reaches project of the Drenthe’s Aa, a project within the framework of nature development and recreation. The Old Aa is connected with the Drenth’s Aa. Both polders will be fitted with a new purpose, i.e. for water storage for emergency situations. In 1998 it became clear that water management in North Holland had to be adapted to fit new circumstances, in particular with regards to the climate changes in the near future. When water levels get too high, the polders can collect and store large quantities of water in a short period of time.
The Oost polder- With regard to the Oost polder near Anna Paulowna, three problems have arisen. First, there is a lack of water storage capacity during wet durations; second, there is a dearth of water during dry durations; and third, the Amstel dike needs reinforcement. To solve the problems, the existing ditch along the Amstel dike will be replaced and widened to 100 meters. In front of the pumping station, a deep storage pool will be dug, and the section of the ditch leading to the station will be broadened. The total surface area which will be available for water storage will be enlarged to 2.5 hectares through this construction. In the winter, there is additional space to store extra water, and in the summer there will be extra water to top up any water shortages. The excavated Earth will subsequently be used to reinforce the dike along the Amstel Lake. This new arrangement is favorable for both plants and animals. The shores will be redesigned in an environmentally friendly way and around the displaced waterway trees, reeds and swamp vegetation will be planted. After all this work, the Oost polder can confidently face what is to come in the 21st century. In this way, already in the planning stage the possibility of having to store larger amounts of water is taken into account. By planning this in advance, it is hoped that future floodings will not take us by surprise when it’s too late to prevent water-related disasters.
