Groundwater extraction on the goldfields of Victoria, Australia

Groundwater supply systems constructed by gold miners in Victoria during the nineteenth century were highly significant in the historical development of water law and water licensing in Australia. Alluvial gold mining required large volumes of water to separate gold from washdirt, but surface flows often failed in seasonally dry conditions. Drought in the mid-1860s prompted miners on the Ovens goldfield in north-east Victoria to exploit groundwater to increase supplies, despite limited scientific understanding of this resource at the time. Analysis of historical plans held by Public Records Office Victoria has revealed numerous ‘source of supply’ tunnels dug by miners to extract groundwater in the area. By the early 1880s, miners were using up to 31 ML of groundwater per day, with much of the water transferred between creek and river catchments. These activities represent an early, large-scale and significant intervention in the hydrogeological environment, several decades prior to economic development of the Great Artesian Basin in northern Australia. Understanding the nature and scale of groundwater use in this period provides vital social and historical context for modern debates about groundwater modelling, extraction and management.