Sankey diagram
Specific type of graphic flow diagram / From Wikipedia, the free encyclopedia
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Sankey diagrams are a data visualisation technique or flow diagram that emphasizes flow/movement/change from one state to another or one time to another,[1] in which the width of the arrows is proportional to the flow rate of the depicted extensive property.
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Sankey diagrams can also visualize the energy accounts, material flow accounts on a regional or national level, and cost breakdowns.[2] The diagrams are often used in the visualization of material flow analysis.
Sankey diagrams emphasize the major transfers or flows within a system. They help locate the most important contributions to a flow. They often show conserved quantities within defined system boundaries.