Sankey charts are a type of diagram that visualize flows between two or more sets of interconnected systems. They are commonly used in urban planning, engineering, and environmental science to map the flow of water, wastewater, oil, or other substances between different sources and sinks.

Sankey charts work by assigning a color to each component of the diagram, typically representing the substance being drawn, flowing from one area to another. The direction of the flow can be determined by using arrows.

The concept behind a Sankey chart is relatively simple. At each node, you have a different substance flowing through it, usually labeled with a name. The arrows in the diagram point towards the node containing the substance being drawn. The length of the arrow represents the rate of flow, or amount of substance entering the node over a specific time period.

To create a Sankey chart, you will need to gather data on the substances being drawn and the relationships between them. This could involve collecting data from city maps, sewage systems, or other sources.

Once you have your data, you will need to choose a color scheme for your chart, which will be a blend of the different substances being represented. This will help color the nodes to make them more distinguishable.

You will also need to determine the direction of flow for each substance. This can be done by choosing the direction that corresponds most closely to the movement of the substance.

Finally, you can add up the flow rates to determine the total amount of each substance being drawn.

Sankey charts can be used in a wide range of applications, including urban planning and engineering. By mapping out the flow of water and other substances, they can help identify areas of concern or need for improvement in drainage systems and wastewater treatment facilities.

One important use of Sankey charts is in managing municipal and industrial waste management. By mapping out the flow of water, oil, or other substances, local authorities can identify areas of concern or need for improvement in drainage systems and wastewater treatment facilities.

Sankey charts can also be used to visualize the flow of goods between different locations. For example, engineers can use them to map out the flow of goods along a transportation route, helping to identify bottlenecks or areas of potential improvement.

Overall, Sankey charts provide a useful tool for mapping and analyzing the flow of substances between different systems. By identifying areas of concern or need, they can help local authorities make informed decisions about improving drainage systems, water and wastewater treatment facilities, and transportation routes.

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