Sankey Diagram
A Sankey diagram visualizes flows (of any kind) and their quantities in proportion to one another. It represents nodes connected with one another by lines or arrows (the bigger the quantity, the wider the line). Sankey Diagrams are widely used in science, especially in physics.
Website Users Flow Chart
BCT Sankey Diagram 01
simple sankey with fake labels
BCT Sankey Diagram 09
Energy Flow Chart
