I don't know much about pelicans. We see a few at the local lake.
The water wall is quite new. A storm water has been opened to the left of the picture and the water will be filtered by the newly planted reeds and then flow to the main body of the lake. We can hope that then the level of the lake will not drop over summer to a level too low for boating.
During the last drought a small sewerage recycling plant was set up by Parks Victoria to top up the lake. I am not sure why it was removed after a few months. It did raise the water level though.
Click on the pic. It is one of my better ones.