Every mapped stream and river in Australia! Map created with QGIS using data for 1.3 million streams from Geoscience Australia GEODATA TOPO 250K vector datasets. Many arid-zone rivers and streams in these maps are highly ephemeral, and may only flow once every few years or even decades. Streams are weighted by both ephemerality (perennial or non-perennial) and hierarchy (minor or major), with the highest weighting for major perennial rivers (i.e. Murray River).
North-east Murray-Darling Basin
Top End, Northern Territory
Goldfields-Esperance, Western Australia
Via twitter & Github