Strahler Numbered Rivers

While checking out some programming articles, I came across a link to an article on the Strahler Number - https://en.wikipedia.org/wiki/Strahler_number

I immediately made the connection to my map-making hobby. I learned awhile ago about mapping good rivers, start small, work your way up, etc... but this seemed to gel in a technical sense with me.

Basically, two streams of the same size (1) make a stream of a larger size (2), but two streams of different sizes make the size of the larger one.

So,

Same Size = 1+1 = 2, 2+2 = 3, 3+3 = 4, etc...
Diff Size = 1+2 = 2, 2+4 = 4, etc....

How you can use this info is to determine a good starting width for you source rivers, make a tool for it called "River 1" from the 'default' river style, specify the width and make it a distinct color, for each new size make a new tool and double the size, do this until you reach the mouth. This way you have a quick visual of the sizes of the rivers. When you're happy with the system, convert the colors into the appropriate "Water" style for your map.

Outline Form
Strahler Number Outline photo Strahler Example.jpg


Map Form
Strahler Number Rivers photo Strahler Example 2.jpg

Comments

Sign In or Register to comment.