which ocean does the murray river flow into?
Southern Ocean
contradiction
 The Columbia drains an area of about 258 @,@ 000 square miles ( 670 @,@ 000 km2 ) . Its drainage basin covers nearly all of Idaho , large portions of British Columbia , Oregon , and Washington , ultimately all of Montana west of the Continental Divide , and small portions of Wyoming , Utah , and Nevada ; the total area is similar to the size of France . Roughly 745 miles ( 1 @,@ 200 km ) of the river 's length and 85 percent of its drainage basin are in the US . The Columbia is the twelfth @-@ longest river and has the sixth @-@ largest drainage basin in the United States . In Canada , where the Columbia flows for 498 miles ( 801 km ) and drains 39 @,@ 700 square miles ( 103 @,@ 000 km2 ) , the river ranks 23rd in length , and the Canadian part of its basin ranks 13th in size among Canadian basins . The Columbia shares its name with nearby places , such as British Columbia , as well as with landforms and bodies of water . 

neutral
 The Columbia receives more than 60 significant tributaries . The four largest that empty directly into the Columbia ( measured either by discharge or by size of watershed ) are the Snake River ( mostly in Idaho ) , the Willamette River ( in northwest Oregon ) , the Kootenay River ( mostly in British Columbia ) , and the Pend Oreille River ( mostly in northern Washington and Idaho , also known as the lower part of the Clark Fork ) . Each of these four averages more than 20 @,@ 000 cubic feet per second ( 570 m3 / s ) and drains an area of more than 20 @,@ 000 square miles ( 52 @,@ 000 km2 ) . 

contradiction
 At its 1836 discovery an inland bend was chosen as the site of the Adelaide city centre and North Adelaide . The river is named after Colonel Robert Torrens , chairman of the colonial commissioners and a significant figure in the city 's founding . The river is also known by its native Kaurna name Karra wirra @-@ parri . The river and its tributaries are highly variable in flow , and together drain an area of 508 square kilometres ( 196 sq mi ) . They range from sometimes raging torrents , damaging bridges and flooding city areas , to trickles and completely dry in summer . Winter and spring flooding has prompted the construction of flood reduction works . A constructed sea outlet , landscaped linear parks and three holding reservoirs contain peak flow . 

contradiction
 The river flows through several areas of ecological interest and supports a variety of rare and endangered species . 

entailment
 The Columbia River is the largest river in the Pacific Northwest region of North America . The river rises in the Rocky Mountains of British Columbia , Canada . It flows northwest and then south into the US state of Washington , then turns west to form most of the border between Washington and the state of Oregon before emptying into the Pacific Ocean . The river is 1 @,@ 243 miles ( 2 @,@ 000 km ) long , and its largest tributary is the Snake River . Its drainage basin is roughly the size of France and extends into seven US states and a Canadian province . 
