What is 'dissection rate'? I am looking for a definition of this term for wikipedia, with a reference.

It's mentioned on Franz Josef Land where it's indicated that the units are km-2/km. I'm curious about how this would be measured. 

I've found precious few mentions of this unit in the usual sources.

Thanks in advance!
In geological terms, "dissection" appears to refer to the creation of cuts in a landscape due to erosion e.g. by the flowing of streams. Dissection rate would then be the rate at which such cuts in the landscape form.

https://books.google.com/books?id=AIyIAAAAMAAJ&amp;pg=PA221&amp;lpg=PA221&amp;dq=dissection+rate+geology&amp;source=bl&amp;ots=bFXfYFDmt3&amp;sig=CiiKojDNHIkyQxzqVkBuSyL1Zr0&amp;hl=en&amp;sa=X&amp;ved=0ahUKEwiVgpOLm8TZAhUKnOAKHXQQBMMQ6AEIUjAI#v=onepage&amp;q=dissection%20rate%20geology&amp;f=false