Question: What is the name of the creek that is part of the river located in the western suburbs of the Adelaide metropolitan area in South Australia?

Context paragraphs:
Gawler, South Australia: Gawler is the first country town on the Australian mainland in the state of South Australia, and is named after the second Governor (British Vice-Regal representative) of the colony of South Australia, George Gawler.  It is about 40 - north of the centre of the state capital, Adelaide, and is close to the major wine producing district of the Barossa Valley.  Topographically, Gawler lies at the confluence of two tributaries of the Gawler River, the North and South Para rivers, where they emerge from a range of low hills.  It is now a suburb of the Greater Adelaide metropolitan area.

Adelaide Metropolitan Football League: The Adelaide Metropolitan Football League (AMFL) was an Australian rules football competition based mainly in the eastern and south-eastern suburbs of Adelaide, South Australia.  Originally known as the Sturt District Football Association (SDFA), the competition reformed after World War II, became the Adelaide Metropolitan Football League in 1963 and folded at the end of the 1967 season.

Division of Hindmarsh: The Division of Hindmarsh is an Australian Electoral Division in South Australia covering the western suburbs of Adelaide.  The division was one of the seven established when the former Division of South Australia was split on 2 October 1903, and was first contested at the 1903 election, though on vastly different boundaries.  The Division is named after Sir John Hindmarsh, who was Governor of South Australia 1836-38.  The 78 km² seat extends from the coast in the west to South Road in the east, covering the suburbs of Ascot Park, Brooklyn Park, Edwardstown, Fulham, Glenelg, Grange, Henley Beach, Kidman Park, Kurralta Park, Morphettville, Plympton, Richmond, Semaphore Park, Torrensville, West Beach and West Lakes.  The international Adelaide Airport is centrally located in the electorate making noise pollution a prominent local issue, besides the aged care needs of the relatively elderly population − the seat has one of the highest proportions of citizens over the age of 65 in Australia.  Progressive boundary redistributions over many decades transformed Hindmarsh from a safe Labor seat in to a marginal seat often won by the government of the day.

Brown Hill Creek: The Brown Hill Creek, also known as Willawilla in the Kaurna language, part of the Patawalonga River catchment, is a watercourse located in the western suburbs of the Adelaide metropolitan area, in the Australian state of South Australia.

Grand Junction Road: Grand Junction Road is the longest east–west thoroughfare in the Adelaide metropolitan area, and is located approximately 9 kilometres north of the city centre.  Travelling from the Port Adelaide region, it is mostly a double-lane sealed road (becoming a single-lane road past Tolley Road intersection at Hope Valley, South Australia) running 21 kilometres to the base of the Adelaide Hills.  The western terminus is at the intersection of Old Port Road, 300 metres east of a causeway, which separates the Port River from West Lakes.  The 2.4 kilometre section of road that continues west of Old Port Road to Semaphore South is named Bower Road.  The eastern terminus of Grand Junction Road is in the suburb of Hope Valley, at the intersection of Hancock Road and Lower North East Road, just before the latter proceeds into the Adelaide Hills, past Anstey Hill Recreation Park and on towards the towns of Houghton and Inglewood.

Hundred of Yatala: The Hundred of Yatala is a cadastral unit of hundred in South Australia covering much of the Adelaide metropolitan area north of the River Torrens.  It is one of the eleven hundreds of the County of Adelaide stretching from the Torrens in the south to the Little Para River in the north; and spanning from the coast in the west to the Adelaide foothills in the east.  It is roughly bisected from east to west by Dry Creek.  It was named in 1846 by Governor Frederick Robe, Yatala being likely derived from 'yartala', an indigenous word referring to the flooded state of the plain either side of Dry Creek after heavy rain.

Culture of South Australia: The culture of South Australia reflects the culture of Australia as a whole.  The state has a variety of wine producing regions including the popular tourist destination Barossa Valley.  The majority of the population is focused in and around the Adelaide metropolitan area.  The geographical landmass varies widely, and a significant portion of Adelaide's terrain is hilly.  The Adelaide Hills features many European villages and small towns which reflect the states immigration trends in the 1880s.  Sport is integral to the Australian identity and South Australia is no exception.  The state has the second highest rate of event attendance of all states and territories with 49% of South Australians aged 15 years and over attending a sporting event each year.

Electoral district of Little Para: Little Para is an electorate for the South Australian Legislative Assembly in the north of the Adelaide metropolitan area in South Australia, covering the suburbs of Elizabeth, Elizabeth Grove, Elizabeth North, Elizabeth East, Elizabeth Park, Elizabeth South, Elizabeth Vale, Gould Creek, Hillbank, Salisbury Heights and Salisbury Park, and parts of Craigmore, Golden Grove and Greenwith.

Gawler West, South Australia: Gawler West, (postcode 5118) is a suburb of the South Australian town of Gawler, located in the northern Adelaide metropolitan area region, 43 km north of Adelaide.  It is bordered by the Gawler River and the Gawler railway line and the suburbs of Gawler South, and Evanston.  During the 2000s period, part of the suburb was renamed Reid by the South Australian Geographical Names Advisory Committee, replacing the Gawler Bypass Road as the western boundary by the Gawler River on the west and north.

Patawalonga River: The Patawalonga River is a river located in the western suburbs of the Adelaide metropolitan area, in the Australian state of South Australia.  It drains an area of flat, swampy lands formerly known as the Cowandilla Plains, which in the mid-20th century were drained by engineering works, enabling the establishment of Adelaide Airport and the development of residential housing.

Supporting paragraphs: Brown Hill Creek Patawalonga River
Answer: Brown Hill Creek