Arroio Dilúvio

Arroio Dilúvio is a brook (arroio) in Porto Alegre, Rio Grande do Sul, Brazil, that flows in areas with high population density. It was or still is known by other names: Riacho Ipiranga (resulting in the name of Ipiranga Avenue), Arroio da Azenha (watermill, resulting in the names of Azenha Avenue and Azenha neighborhood), Riacho or Riachinho and even Arroio do Sabão, this being the current name of the stream that gives it its most distant source.