Anstey and Ormsby rivulets respectively, and had Kaurna names before European settlement. First, Second and Third Creeks have been particularly heavily modified. Some sections have been converted to concrete channels; others run through landscaped private gardens and some run in underground pipes. Much of the original vegetation has disappeared from the creeks, particularly those closest to the city. Introduced species including olives, bamboo, boxthorn, watsonia and blackberries have displaced native flora. There is some risk of flooding from all of these eastern suburbs creeks, as shown by the Floodplain Study, which includes plans and maps drawn up by the City of Burnside and neighbouring councils. First Creek begins in Cleland Wildlife Park on the western side of Mount Lofty and Crafers, flows north-west through the south-eastern suburbs, past a drop at the Waterfall Gully falls, through Hazelwood and Tusmore Parks, and Marryatville High School, before discharging into the Torrens near Adelaide Zoo. Much of its course through the suburbs has been canalised, some underground. About 7.5% of its flow is diverted as it flows through the Adelaide Botanic Garden to create the First Creek Wetland, a scheme set up to ensure water security and to encourage diversity of flora and fauna in the area, thus helping to maintain health urban environments. Botanic Creek runs through the eastern Adelaide parklands from south to north, into the Adelaide Botanic Garden before joining First Creek. Second Creek arises in the Summertown area of the Adelaide Hills, north of First Creek, and flows through Greenhill, through Slape Gully, entering the more populated suburbs as it flows through the Michael Perry Reserve in Stonyfell and onwards through the eastern suburbs of Erindale, Marryatville, Kensington (open at Borthwick Park) and Norwood, much of it canalised underground as far as St Peters. The St Peters section is an open canal shortly before it joins the Torrens. It was once called Hallet's Rivulet. Stonyfell Creek, arising on the eastern boundary of Stonyfell, flows through Kensington Gardens, including an open stretch in the Reserve before again being piped underground under West Terrace, passing under Kensington Park and Beulah Park. It joins Second Creek near the junction of Magill and Portrush Roads. First and Second Creeks come within about of each other in Marryatville, with formerly only flat land between them. Third Creek arises near Norton Summit and flows through the suburbs of Magill, Tranmere, Trinity Gardens and Payneham, much