The Murray-Darling River is the longest river in Australia. It runs through the southeastern part of the country, primarily in the states of New South Wales, Victoria, and South Australia. The Murray-Darling Basin is one of Australia's most significant river systems, covering a vast area and playing a crucial role in supporting agriculture, ecosystems, and water supply for human consumption. The Murray-Darling River has a total length of approximately 2,508 kilometers (1,558 miles) and is an important resource for irrigation, wildlife habitats, and recreational activities.