located_in_the_administrative_territorial_entity eyre creek 
___MASK4___ ( abbreviated as SA ) is a state in the southern central part of Australia . It covers some of the most arid parts of the country . With a total land area of , it is the fourth - largest of Australia ' s states and territories . It has a total of 1 . 7 million people , and its population is the most highly centralised of any state in Australia , with more than 75 percent of South Australians living in the capital , Adelaide , or its environs . Other population centres in the state are relatively small . Eyre Creek is a short ephemeral waterway which is located in the ___MASK22___ Valley . It runs along Main North Road , south from Leasingham and enters the ___MASK24___ River just north ___MASK38___ Auburn . It was named in honour ___MASK38___ the explorer Edward John Eyre , who explored the area in 1839 during one ___MASK38___ his expeditions . ___MASK54___ is the capital city ___MASK38___ the state ___MASK38___ ___MASK4___ , and the fifth - most populous city ___MASK38___ Australia . In June 2014 , ___MASK54___ had an estimated resident population ___MASK38___ 1 . 31 million . ___MASK4___ , with a total ___MASK38___ 1 . 7 million inhabitants , has the most centralised population ___MASK38___ any state in Australia , with more than 75 percent ___MASK38___ its people living in greater ___MASK54___ , while the other population centres in the state are relatively small . Main ___MASK68___ ___MASK31___ is the major north - south arterial route through the suburbs north ___MASK38___ the Adelaide City Centre in the city ___MASK38___ Adelaide , ___MASK4___ . It continues north through the settled areas ___MASK38___ ___MASK4___ and is a total ___MASK38___ long , from ___MASK68___ Adelaide to out ___MASK38___ Port Augusta . It follows the route established in the early years ___MASK38___ the colony by explorer John Horrocks and was a major route for farmers and graziers to reach the capital , passing through rich farmland and the Clare Valley wine region . In 2011 , the section ___MASK38___ road between Gawler to Wilmington was renamed Horrocks Highway . ___MASK43___ St Vincent is a large inlet ___MASK38___ water on the southern coast ___MASK38___ Australia , in the state ___MASK38___ ___MASK4___ . It is bordered by Yorke Peninsula on its west , the mainland and Fleurieu Peninsula to its east and with its entrance as being a line from Troubridge Point on Yorke Peninsula to Cape Jervis on Fleurieu Peninsula . The ___MASK24___ River , is part ___MASK38___ an estuary located in ___MASK4___ . It is an ephemeral river that usually flows only when there are significant rains . It rises above Mintaro , flowing southward , passing the towns ___MASK38___ Watervale and Auburn , where it is fed by several small creeks , and then curves to flow westerly past the town ___MASK38___ Balaklava into the head ___MASK38___ Gulf St Vincent at Port ___MASK24___ . ___MASK26___ is an island country situated in the ___MASK53___ Sea , consisting ___MASK38___ the third - largest island ___MASK38___ the Greater Antilles . The island , in area , lies about south ___MASK38___ ___MASK100___ , and west ___MASK38___ Hispaniola ( the island containing the nation - states ___MASK38___ Haiti and the Dominican Republic ). ___MASK26___ is the fourth - largest island country in the ___MASK53___ , by area . ___MASK54___ city centre is the innermost locality ___MASK38___ Greater ___MASK54___ , the capital city ___MASK38___ ___MASK4___ . It is known by locals simply as "" The City "" or "" Town "" to distinguish it from Greater ___MASK54___ and from the City ___MASK38___ ___MASK54___ ( which also includes North ___MASK54___ and the parklands ). The locality is split into two key geographical distinctions : the city " square mile ", bordered by North , East , South and West Terraces ; and the section ___MASK38___ the ___MASK54___ Parklands south ___MASK38___ the River Torrens which separates the built up part ___MASK38___ the city from the surrounding suburbs and North ___MASK54___ . The ___MASK22___ Valley wine region is one ___MASK38___ Australia ' s oldest wine regions , best known for Riesling wines . It lies in the Mid North ___MASK38___ ___MASK4___ , approximately 120 km north ___MASK38___ Adelaide . The valley runs north - south , with Horrocks Highway as the main thoroughfare . Edward John Eyre ( 5 August 1815  30 November 1901 ) was an English land explorer ___MASK38___ the Australian continent , colonial administrator , and a controversial Governor ___MASK38___ Jamaica .