On what is the Delta Programme based?
The Delta Programme has been set up in a pragmatic, typically Dutch way. It is characterised by a safe but flexible approach that allows us to take necessary measures now while ensuring that there are sufficient options left open for tackling the problems the future may bring (cf. Adaptive Delta Management).
In terms of future developments, the Delta Programme is based on measurements and the scenarios of the KNMI (Royal Dutch Meteorological Institute) developed in 2006, which were revised at the end of 2012. Over the past century, we have seen sea levels rise, subsidence occur and our climate become warmer. This has been measured over the years. The KNMI figures show that this trend is continuing. When planning our country we need to take heavier rainfall into account. Moreover, summers may become drier, which will endanger our freshwater supply. Moreover, summers may become drier, endangering our freshwater supply.
The Delta Programme entails measures to secure the safety of our delta in the near future and provides a basis for our preparations for the more distant future. The climate scenarios and the socio-economic scenarios have been combined into four so-called delta scenarios.
Given that we do not know exactly how the climate will change, flexibility is an essential element in the choice of measures. An example of such a flexible measure is sand supplementation along the shore. Sand is spread based on the measured rise in sea level. If the sea level rises more rapidly, more sand will be spread; if the rise lags behind the predictions, less sand will be required. The Room for the River programme is also characterised by an adaptive, flexible approach.