FlowingData has a tip to an interesting visualization from David Wicks showing rainfall and water consumption across the US in a graph as shown above.
The placement of each line represents a rainfall measurement, and the length and end placement is based on urban consumption. Lines pulled farther from its source change to black. The data comes from two sources: USGS for water consumption and NOAA/NWS for rainfall data provided.
The result looks very similar to Line Integral Convolution, and is a surprisingly effective way to represent this information.
