The scenarios that are presented in this report, are developed in collaboration with the VLM andseveral thematic experts, among which also representatives of the Oudlandpolder planning guidancegroup. They consist of narratives and figures explaining the uncertain evolution of several factorsexternal to the Oudlandpolder system we modelled, such as changes in land use, population growthor (technological) developments in urban water management systems, hence factors going beyondthe control of the people involved in the Oudlandpolder’s development at a local and regional scale.Notwithstanding this, these external evolutions may impact the development of the Oudlandpolder. That is why we tried to come to a clear understanding of their true nature, and linked them to theOudlandpolder’s SD model. The latter implies that we scaled down these external uncertainties to thelevel of the modelled system and defined input variables where these external uncertainties connectwith the processes giving rise to the Oudlandpolder’s internal functioning.