 The Riverina / rɪvəˈriːnə / is an agricultural region of south @-@ western New South Wales ( NSW ) , Australia . The Riverina is distinguished from other Australian regions by the combination of flat plains , warm to hot climate and an ample supply of water for irrigation . This combination has allowed the Riverina to develop into one of the most productive and agriculturally diverse areas of Australia . Bordered on the south by the state of Victoria and on the east by the Great Dividing Range , the Riverina covers those areas of New South Wales in the Murray and Murrumbidgee drainage zones to their confluence in the west . 
