Water that travels from the groundwater sources form first order streams on the surface. When two of these converge, a second order stream is created, and so on. As stream orders rise, so does the quantity of water flowing in a river or stream. Click on the arrow to view the legend for the colors on the map.
In karst environments like in Nashville, this relationship of water above and below the surface is imperative for our waterways to have a base flow. We discuss these topics in more detail in our WE story.