Question: An indigenous peoples of Australia, the Peramangk, warned who that the area of Hoffnungsthal, South Australia was prone to flood, but were ignored?

Context articles: Indigenous Peoples' Day
Peramangk
World Indigenous Games
Hoffnungsthal, South Australia
Canadian Aboriginal law
List of extinct indigenous peoples of Brazil
Indigenous peoples
Indigenous archaeology
List of indigenous artists of the Americas
Indigenous peoples of the Subarctic

Indigenous Peoples' Day (also known as Native American Day) is a holiday that celebrates the Indigenous peoples of North America.
 It is celebrated in various localities in the United States.
 It began as a counter-celebration to Columbus Day, promoting Native American culture and commemorating the history of Native American peoples.
 The celebration began in Berkeley, California, through the International Indian Treaty Council, and Denver, Colorado, and now in Vermont, as a protest against Columbus Day.
 The latter is observed as a federal holiday in the United States, but it is not observed as a state holiday in every state, and most retail enterprises stay open.
 Indigenous Peoples' Day is usually held on the second Monday of October, coinciding with the federal observance of Columbus Day.
 It is similar to Native American Day, observed in September in California and Tennessee, and the same day as Indigenous Peoples' Day in South Dakota.
The Peramangk are an indigenous Australian people whose traditional lands are primarily located in the Adelaide Hills, and also in the southern stretches of the Fleurieu Peninsula in the Australian state of South Australia.
 They were also referred to as the Mount Barker tribe, as their numbers were noted to be greater around the Mount Barker summit, but Peramangk country extends from the Barossa Valley in the north, south to Myponga, east to Mannum and west to the Mount Lofty Ranges.
The World Indigenous Games is a multisport event, which involves over 2,000 indigenous athletes competing against one another.
 These athletes come from all across the world to unite and compete fairly in this event (approximately 30 countries) (2015).
 Throughout the first three days athletes mingle and bond in their area of sport/games before entering the ten-day competition.
 The Games are governed by the Inter Tribal Council, a Brazilian indigenous peoples NGO that has staged Brazil's national Indigenous Games since 1996.
 The first edition of the Games was held in Palmas, Brazil, from October 23 to November 1, 2015.
 The Games are expected to be held intermittently thereafter, and will feature competitive sports and non-competitive demonstration events.
 Throughout history, indigenous peoples have had many traditional sports and dances.
 It is through their history that they have turned these into competitive games and have made it an influential impact on the world and their people's culture.
 These games consist of body paint replacing sportswear, bare feet instead of sneakers and a looser conception of competition that comes with little value to winning.
 Dana.F (2013.)
Hoffnungsthal ("Valley of Hope") is the location of a former German pioneer settlement, located in South Australia's Barossa Valley.
 Founded in 1847, it was located in an ephemeral lagoon which was dry for the first years of settlement.
 Local Peramangk people warned the settlers that the area was prone to flooding, but this advice was ignored.
 In October 1853, after a week of heavy spring rains, the village was flooded and many of the houses were evacuated.
 After the cost of a proposed drain was seen as prohibitive, the village was eventually left deserted.
 Most of the settlers moved to the Barossa village of Bethanien as well as further a field.
Canadian Aboriginal law is the body of Canadian law that concerns a variety of issues related to Indigenous peoples in Canada.
 Thus, Canadian Aboriginal Law is different than Indigenous Law.
 In Canada, Indigenous Law refers to the legal traditions, customs, and practices of Indigenous peoples and groups.
 Canadian Aboriginal law provides certain Constitutionally recognized rights to land and traditional practices.
 Aboriginal is a term used in the Constitution of Canada and includes First Nations, Inuit and Métis people.
 Canadian Aboriginal Law enforces and interprets certain treaties between the government and Indigenous people, and manages much of their interaction.
 A major area of Aboriginal law involves the duty to consult and accommodate.
At the time of the discovery of Brazil by the Europeans, a total of 2,000 indigenous nations, divided into several thousands of tribes existed in Brazil.
 The total number of native tribes which inhabited the present day Brazil at the time of first contact is disputed, as well as difficult to ascertain.
 The names of large number of tribes who were exterminated as a result of intertribal warfare is not recorded anywhere and so is the case of several smaller tribes who were wiped out by the colonizers.
 Curt Nimuendajú gives a list of 1,400 nations in his monumental work Mapa etno-histórico do Brasil e regiões adjacentes, but he ignored many smaller (extinct) tribes in Eastern Brazil, and was unaware of some other tribes which were uncontacted at that time.
 Currently only 200 nations (790 tribes) are alive, with no survivors being reported for the remaining nations.
 However this doesn't mean all their bloodlines are extinct only their cultures.
 Brazilian Pardo and Mestizo population have mostly unknown indigenous backgrounds.
 Which can and probably have many of this indigenous peoples as ancestors.
 The Bandeirantes once hunted and enslaved indigenous peoples in the then unknown interior of Brazil from the 16th to the early 19th century.
 The indigenous peoples were eventually aculturated and integrated into European civilization.
Indigenous peoples, also known as first peoples, aboriginal peoples, native peoples, or autochthonous peoples, are ethnic groups who are descended from and identify with the original inhabitants of a given region, in contrast to groups that have settled, occupied or colonized the area more recently.
 Groups are usually described as indigenous when they maintain traditions or other aspects of an early culture that is associated with a given region.
 Not all indigenous peoples share this characteristic, sometimes having adopted substantial elements of a colonising culture, such as dress, religion or language.
 Indigenous peoples may be settled in a given locale/region or exhibit a nomadic lifestyle across a large territory, but they are generally historically associated with a specific territory on which they depend.
 Indigenous societies are found in every inhabited climate zone and continent of the world.
Indigenous archaeology is a form of archaeology where indigenous peoples are involved in the care of, excavation and analysis of the cultural and bodily remains of peoples they consider their ancestors.
 It has been largely developed as a sub-discipline of archaeology since the late twentieth century, in response to some of the historical inequities in the practice, which developed largely as Europeans and Americans studying ancient cultures other than their own.
 Frequently archaeologists who were not members of the indigenous group being studied had led the excavation and care of remains and artifacts.
 They often ignored or did not consult the descendents or successors of the people being studied.
 The Indigenous desire to participate in the research and management of their heritage is related to activism of the 20th century, which arose in party due to the earlier "intellectual and spiritual colonization" by Europeans throughout the eighteenth to twentieth centuries.
This is a list of visual artists who are Indigenous peoples of the Americas, categorized by primary media.
 Mestizo and Métis artists whose indigenous descent is integral to their art are included, as are Siberian Yup'ik artists due to their cultural commonalities with Alaskan Yup'ik people.
 This list includes notable visual artists who are Inuit people, Alaskan Natives, Siberian Yup'ik, American Indians, First Nations, Métis, Mestizos, and indigenous peoples of Mexico, the Caribbean, Central America, and South America.
 Indigenous identity is a complex and contested issue and differs from country to country in the Americas.
 Inclusion to this list is based on legal membership to an indigenous community, when applicable, or recognition by the relevant indigenous community/communities of the individual as a member of that community.
Indigenous peoples of the Subarctic are the aboriginal peoples who live in the Subarctic regions of the Americas, Asia and Europe, located south of the true Arctic.
 This region includes the interior of Alaska, the Western Subarctic or western Canadian Shield and Mackenzie River drainage area, the Eastern Subarctic or Eastern Canadian Shield, Scandinavia, Western Russia and East Asia.
 Peoples of subarctic Siberia and Greenland are included in the subarctic; however, Greenlandic Inuit are usually classified as Indigenous peoples of the Arctic.