• Location: Europa 1, 2672 ZX Naaldwijk
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As a result of climate change we will see more and more occasions of heavy precipitation. The results of these heavy precipitation events can cause a lot of damage. We already implement a lot of measures to prevent water nuisance, but the future demands that we anticipate even greater effects of climate change in the design of areas and during the construction of houses and businesses.

That is why it is important to take the necessary measures. There is barely any open space left in the area of Westland. That makes it difficult to create new and extra open water to collect the surplus of precipitation. Therefore it is necessary to find creative solutions which can store, collect and discharge the surplus of water. One of the solutions would be collecting and storing the water at the place where it falls, for example on rooftops or on parking lots. These type of measures increase the ability of an area to hold the water where it falls. Other measures could include semi-infiltratable pavement, green rooftops and infiltration-banks.


In March 2018 the World Horti Center officially opened. This is a place where new developments and knowledge regarding for example water related problems can get together. It is a place for innovations in the field of cultivation and water management.

The goal of the measures which are taken at the World Horti Center increase the ability of the area to hold and infiltrate water. Three different measures have been implemented: a swale, porous paving materials at the parking lots and ground infiltration.



In areas with a large peat surface there are as of yet hardly any facilities to let water infilitrate the surface. At the World Horti Center such measures are already being put into place and answers are given to questions such as: how large should these facilities be? What are the best means of maintenance? How efficient are these solutions now and in the future?

With who?

The following stakeholders played a role in the process and development:

  • The municipality Westland
  • Water board Delfland
  • Lentiz (a school of applied sciences)
  • Demokwekerij
  • External expertise
  • Flora Holland
  • Gardener Van Der Drift

Stakeholder engagement & co-creation

A couple of workshops with the aforementioned stakeholders resulted in a climate adaptive design. During the opening of the World Horti Center in March 2018, demonstration experiments took place. These experiments were carried out during the opening day on different locations by students who were supervised by their professors. These test show the efficiency and effectiveness of the climate adaptive measures. These experiments will take place again, in order to see what happens with the effectiveness and efficiency of the measures over time. The data of these experiments has been processed and can be used to compare with data from other tests in the region or internationally.

Waterdoorlatende verharding