%T Planning for the forces of nature - The performance of decision-supporting planning instruments in including natural hazard mitigation into the local planning process: the Water Assessment in the Netherlands and the Safety Element in California %L theses_frw2659 %X j. This research studies the performance of the Dutch water assessment and the Californian safety element. Both planning instruments stimulate local governments to include non-structural natural hazard mitigation into land use planning. Although the overall performance is reasonable, natural hazard mitigation not yet forms a basic part of planning. %D 2007 %A E. Verheijen