UTS Library

Finding Archival Maps for Architecture: Diverted creeks - Sydney

In this guide:

Google searching also seems to be the best way to find data on this topic, mainly because a lot of it is published by governmental agencies. 
Try searches like 

creek diversion Sydney - which yields reports like this one from Environment NSW

alternate searches I tried included

(River OR creek OR stream) management Sydney

Library catalogue
Searching for river management sydney helped me find an online resources called Dams of Sydney

This might be useful for comparing suburb sized chunks of Sydney over time, via aerial photography, to see if rivers & creeks have disappeared. Search for a suburb and then use the 'basemaps' option in the top right to choose the background layer to be the 1943 aerial footage, and then use the drag bar to compare then and now. 









Timeline of Sydney water from Water NSW might have some info too