Sankey Diagrams

Austrian consulting and engineering company Intergeo offers site investigation and remediation as well as waste management services. In a reference project for the city of Bourgas a waste management plan was developed. It shows the following Sankey diagram:

From what I understand despite the small print in the diagram, it is a breakdown of household waste in the city by waste types, and the different treatment paths (recycling, composting, landfill, etc.). Values are in ton/year refering to 2007. Waste fractions are color-coded.