In the 1800s, colonial settlers moved Ballarat's Yarrowee River. The impacts are still felt today

The discovery of gold in Ballarat in 1851 transformed its landscape to a staggering degree. Within days, and despite the news being initially suppressed, hundreds of men had gathered along the Yarrowee River.

They sluiced the clay and soil, turning the once pristine waters into what writer William Bramwell Withers described as

liquid, yellow as the yellowest Tiber flood, and its banks grew to be long shoals of tailings.

Over the next few weeks, the waterways of the Yarrowee River and of Gnarr Creek were diverted into water courses to support the search for gold.

The river was moved to make way for the town population boom, which was driven by a lust for gold. The end result was that the original, serpentine path of the river – originally across floodplains equipped to handle the natural ebb and flow of water and seasonal flooding – eventually came to be a much straighter line. Part of the river now runs underground through a tunnel.

Our new interactive map, Yarrowee River History: Peel to Prest (which takes its name from the two streets that serve as borders for the mapping), interrogates the long-term effects of this water diversion on community and Country.

A collaboration between Federation University, the Wadawurrung Traditional Owners Aboriginal Corporation and the city of Ballarat, our project overlays historical maps with Google Maps to illustrate how the area changed.

Read more: Victoria’s gold rush ended in the 19th century. So why are people still finding so much gold?

‘We inherit the scars of this trauma’

In Ballarat, water is deeply significant to the culture of the area’s First Nations inhabitants, the Wadawurrung people, who stewarded these lands and waterways for millennia.

So we wanted people using our interactive map to ponder the cultural significance of these gold rush impacts to the Wadawurrung people and the environment.

For the Wadawurrung people, the watercourse now known as the Yarrowee River carries profound historical meaning.

This river bore the names Yaramlok and Narmbool, and these names were used interchangeably to reference different segments of the Yarrowee.

The river wasn’t merely a physical entity – it was a symbol of spiritual and cultural significance, the life force which flows through Country.

It supported fishing, agriculture and food gathering. It symbolised the deep and harmonious connection with dja (Country) and the precious resource of ngubitj (water).

The river diversion affected the Wadawurrung profoundly. As two of us (Shannen Mennen and Kelly Ann Blake) write on the Yarrowee River History: Peel to Prest site:

Colonisation and mining in Ballarat led to devastation and destruction of Wadawurrung dja, including the Yarrowee River. Settlement was built upon our living spaces and as a result Wadawurrung people were displaced.

The withholding of cultural rights and obligations further increased the dispossession of our people, who were unforgivingly forced to adapt to change. Still today we inherit the scars of this trauma.

Colonial settlers altered the river

in a way which excluded the knowledge Wadawurrung people had built upon for many thousands of years […] The habitat surrounding the Yarrowee was removed or altered, damaging animal, fish and insect populations.

The destruction of the waterway continues to impact our people today. However, the spirit of this land remains within us and we continue as Wadawurrung people to live alongside the Yarrowee whilst working to restore its health and vitality.

The Wadawurrung people involved in this project hope it fosters interconnectedness between the waterway, our human ancestors, creator beings and all living things.

It is also crucial in working towards reconciliation by helping people understand the devastating environmental destruction wrought by the gold rush for the First Nations people of the region and the deep connection between culture, heritage and the landscape.

Effluent, flooding and typhoid

When one looks at the sheer scale of the transformation of Ballarat and district wrought by the gold rush, the level of environmental destruction is almost beyond comprehension.

Vast forested tracts of land were felled of trees, the topsoil dug up and blown away, the earth ripped open by deep tunnelling. Imported sheep began to harden the soil (disrupting native plants) and consuming the Murrnong plants, whose roots were a staple of the Wadawurrung people.

Moving the river made the area prone to disastrous flooding as water was diverted away from floodplains. Land was polluted by effluent and chemical residue from mining. This led to multiple outbreaks of disease. As one contributor to the Ballarat Star wrote at the time:

The smell from this creek for a quarter of a mile on each side is most frightful — the bed of the creek looking and smelling like the refuse pigs’ droppings mixing with their liquid manure. Nearly one-half of the children, and even adults, have been swept off between the Gnarr Creek and the Cemetery, from typhoid fever.

This project aims to draw attention to the absolute centrality of the waterways to Australia’s history and continual sustainable environmental management.

Mapping the transformation of Australia’s waterways since colonisation is crucial to understanding the long term effects of changes we make to our environment.

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This article is republished from The Conversation is the world's leading publisher of research-based news and analysis. A unique collaboration between academics and journalists. It was written by: David Waldron, Federation University Australia; Kelly Ann Blake, Indigenous Knowledge, and Shannen Mennen, Indigenous Knowledge.

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Kelly Ann Blake works for Wadawurrung Traditional Owners Aboriginal Corporation as a Biodiversity Project Officer.

Shannen Mennen works for Wadawurrung Traditional Owners Aboriginal Corporation as a Project Officer.

David Waldron does not work for, consult, own shares in or receive funding from any company or organisation that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment.