Water management in the Murray-Darling Basin is extremely complex, defined by the differing and in some cases opposing needs of communities, agribusiness and the environment. This week on the program we look at the tension between the financial cost and the broader value of water in the Basin, and the impact this is having on the biggest river system on the continent.We hear from Mel Gray, Healthy Rivers Ambassador for the Macquarie and Castlereigh rivers in Dubbo, and Dr Virginia Marshall, author of “Overturning aqua nullius: securing Aboriginal water rights” and Indigenous Postdoctoral Fellow at the Australian National University.South Australian Murray-Darling Basin Royal Commission: https://www.mdbrc.sa.gov.au/