9.8 Flow Diagrams

• A flow diagram represents a set of dynamic relationships by capturing the physical or metaphorical flow of people, materials, communications, or objects through a set of nodes in a network.

• Two types of flow diagrams are Sankey diagrams and alluvial diagrams.

• In a Sankey diagram, the width of the line between two nodes is proportional to the flow amount.

• Alluvial diagrams are a more rigidly defined subset of Sankey diagrams.