Veiligheid tegen overstromen

Kosten-batenanalyse voor Ruimte voor de Rivier, deel 1

Report (2005)
Affiliation
None
Copyright: Eijgenraam, C.J.J.
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Published Date

01-04-2005

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Source:

CPB document nr. 82, ISBN 90-5833-212-8

Abstract

This report is part 1 of a Cost-Benefit Analysis of the project ‘Space for the Rivers’, which aims at improving the safety against flooding along the river Rhine. A new method has been developed to find the optimal safety level for dike rings against flooding and the accompanying investment strategy. This method has been applied to 22 dike rings along the rivers. An important outcome is that the current safety norms in the Act on the Water defences turn out to be not optimal from an economic point of view. For 16 dike rings, the optimal safety level is higher than their present legal norm, for 9 of them even more than twice. This is especially true for the two dike rings in the province Utrecht: Kromme Rijn and Gelderse Vallei. On the other hand, the dike ring Biesbosch (Noordwaard) should no longer be a well-protected dike ring. The outcomes support a ‘robust’ investment strategy which takes future changes fully into account.