everywhere in world where a river runs through a semi desert area and that water gets siphoned off for irrigation is in an environment mess despite the the vested interests saying 'we only take water when it's flowing, so we have no effect on the river' more than 50% of the average flow of the darling is taken . https://theconversation.com/the-darling-river-is-simply-not-supposed-to-dry-out-even-in-drought-109880 I remember reading fishing magazines when I was a kid in the seventies, back then the darling was pristine full of 30 kg cod and hadn't stopped flowing for decades, even then they were warning of a looming disaster coming just when large scale corporate agriculture was starting in the darling, fears were the darling would go the way of the Wimmera, Avoca and lower Loddon rivers.