Take a look at
Searching for the Snowy : an environmental history
by George Seddon 1994
ISBN 1863735593
I don't know if it will answer your questions but it's a good start if you are trying to understand the Snowy. It predates the current obsession with climate, so you may not find what you want. I don't have a copy, and it's decades since I read it, but I recall George putting his whole life into researching and writing it.
JamesMc |