AAP: The Victorian government’s $4.9 billion water plan might not be enough to secure Melbourne’s long-term water needs, a senior water bureaucrat says. Melbourne Water chairwoman Cheryl Batagol said the forthcoming desalination plant, the controversial northsouth pipeline and other projects may need to be supplemented by other schemes within a decade, Fairfax newspapers reported on Thursday. “Victoria is undertaking major water augmentation projects, but it remains in the back of …