T
he purpose of the Metabolism section of the analysis is to get insight into material stocks and flows within Buiksloterham
and surrounding areas and to understand how these are projected to change over time. This analysis was used as the foundation for modeling the proposed goals and interventions for moving to a Circular Buiksloterham. As with the context and stakeholder analyses, we have assessed the current state in Buiksloterham and also created a model for the projected state in 20 years time. This analysis looks primarily at the type and quantity of physical flows (energy, water, materials), though some nonphysical flows, like money, have also been considered. The data are based on bottom-up modeling using known and projected numbers of vehicles, buildings, residents, and other drivers of supply demand. The +20 model is based on our understanding of development plans, policies, and the intentions of stakeholders. It extrapolates current resource flows to the future state based on the best available information, including new building codes and policies. Where sitespecific data were not available, gaps were supplemented with statistical information. The interventions that are proposed in the roadmaps for moving towards a Circular Buiksloterham have been evaluated using the +20 model. Where possible, we have used the model to quantitatively assess each intervention’s projected impact on supply and demand of resources.
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