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Budj Bim: Gunditjmara Aquaculture, Channels and Eels

Explore Budj Bim aquaculture: Gunditjmara eel channels and traps, archaeological dating, colonial disruption and restoration of Tae Rak wetlands.

c. 6600 cal BP · millennia of modification; UNESCO 2019 · Australia, south-western Victoria: Tae Rak, Kurtonitj and Tyrendarra · Land & water

Across the volcanic plains of south-western Victoria, Gunditjmara communities transformed wetlands into an extensive system for harvesting and retaining aquatic animals. The Budj Bim landscape connects channels, stone barriers, ponds and places of residence. Its history brings aquaculture into the history of food production: the deliberate shaping of aquatic environments through knowledge of water, animals and responsibilities to Country, the lands and waters with which a community is connected.

Basalt wetlands and the life of kooyang

Ancient lava flows established the physical foundations of the system. Basalt barriers redirected drainage, leaving lakes, wet depressions and connecting waterways, including Tae Rak, also known as Lake Condah. Gunditjmara knowledge distinguished differences in water level and connections between these places. Stone could be an obstruction to remove or a material for constructing a barrier. The productive landscape emerged from the interaction of natural landforms with intentional work, rather than from either geology or engineering alone.

A central animal was kooyang, the southern shortfin eel, Anguilla australis. Eels grow in freshwater, while mature animals migrate out to sea to reproduce; young eels return to estuaries and inland waterways. Pond management worked with this life cycle instead of completing reproduction inside an artificial enclosure. Maintaining suitable habitat and connections along migration routes therefore mattered alongside trapping. The wider aquatic food economy also included other animals, so neither its nutritional base nor its environmental knowledge should be reduced to a single species.

What the 6600-year evidence actually dates

Research published in 2012 connected the chronology of one Lake Condah feature with sediments filling an excavated channel. Stratigraphy and radiocarbon analysis of charcoal indicated an early phase of basalt removal and construction of a branching channel by approximately 6600 calibrated years before 1950. The abbreviation cal BP expresses this archaeological convention; the date corresponds roughly to the middle of the fifth millennium BCE. It dates neither the volcanic eruption nor the simultaneous creation of every structure across Budj Bim.

The same publication identified later additions of stone walling within approximately the past 600–800 years. The landscape consequently records modification and renewal across different periods. Archaeological dates identify particular construction episodes, while Gunditjmara knowledge explains relationships and meanings that charcoal cannot reveal. Work undertaken with the community brings these forms of evidence together. Reconstructing former water levels has also mattered: drainage changed the setting so substantially that viewing dry stone features alone can obscure their original functions.

Channels, barriers and ponds working together

Channels conveyed water and directed moving animals towards selected places. A barrier could raise the water level or restrict its escape, while a narrowing provided a position for a trap. A depression connected to a watercourse could hold fish. Such arrangements depended on understanding relative heights: a small difference at a sill could determine whether water remained in a basin or continued downstream. Not every wall directly caught an eel. Some structures established the conditions that allowed other parts of the system to function.

At Kurtonitj, the Traditional Owners’ site documentation describes a constructed channel approximately 70 metres long, joining two wetlands and lined in places with basalt blocks. The area also preserves barriers and substantial water-retaining depressions. This gives a concrete example of landscape engineering without implying that the entire heritage property followed one blueprint. Existing hollows were used, but their connections and the duration of inundation were altered. Seasonal water availability remained part of the operating system, rather than an external condition that its builders could ignore.

Holding, harvesting and preparing food

Keeping live eels in ponds separated the arrival of animals from the moment they were eaten. Water became a space for growth and a means of retaining a food resource. Long woven baskets with funnel-shaped entrances could be fitted into constrictions; stone and wooden elements guided animals towards them. Basket making, knowledge of eel behaviour and the operation of fixed structures belonged to the same technology. The visible masonry is therefore only one surviving part of a much larger body of practical skill.

Eels could also be preserved by smoking, including in suitably used hollows of large trees. Holding a live animal and processing a captured one addressed different needs: maintaining food availability and making food easier to move beyond the place of capture. Community accounts and museum interpretation describe eels being exchanged at gatherings with other groups. These activities indicate a food economy extending beyond immediate consumption. They do not, however, supply comparable catch records from which an exact production graph could be constructed across successive centuries.

Houses, gatherings and responsibilities to Country

Surviving stone house foundations connect aquatic management with extended residence in the landscape. This need not mean that every household stayed in one place permanently: residence, gatherings and seasonal movement could coexist. Tyrendarra was both a place of water engineering and a meeting ground connected with culturally significant routes. The local complex is described as containing eighteen stone barriers and seven excavated channels. Those numbers refer to Tyrendarra, rather than to the whole Budj Bim landscape, and demonstrate how different local arrangements formed a wider regional system.

Maintenance depended on knowledge passed between generations, work on water connections and attention to environmental change. Country encompasses relationships between place, ancestors, law, family and cultural practice; it is more than a productive parcel of land. Budj Bim is also an ancestral presence within the creation account of the landscape. Engineering descriptions therefore need to remain connected to Gunditjmara perspectives. Describing the system as the work of anonymous ancient builders would erase the people whose knowledge produced it and whose responsibilities continue.

Colonisation changed access to land and water

European settlement expanded during the nineteenth century through violence, land appropriation and restrictions on Indigenous livelihoods. Gunditjmara resistance included defence of the stony landscape and its resources. Lake Condah Mission opened in 1867 near the Country that people refused to abandon. Subjection to mission administration and colonial policy did not extinguish their connections with place. The mission’s closure in 1918 and subsequent forced relocations brought further intervention into family life, while community members continued to assert their belonging.

Drainage simultaneously changed the physical conditions on which aquaculture depended. A major channel completed in 1954 carried water from Condah Swamp through the lake towards Darlot Creek. For land use organised around dry ground, drainage enabled a different agricultural landscape; for Gunditjmara aquatic management, it removed water needed by ponds and channels. The dry appearance of surviving stone structures is therefore partly the result of a comparatively recent intervention. It should not be treated as evidence that the system always operated under those conditions.

Recovering rights and restoring wetlands

The return of the former mission lands to Gunditjmara in 1987 formed one stage in rebuilding control over significant places. A Federal Court determination on 30 March 2007 then recognised specified native title rights across a substantial area of south-western Victoria. These included access, presence, use of resources and protection of places. Native title has a particular legal basis and can coexist with other rights. Recognition should therefore not be described as the transfer of exclusive ownership over the entire cultural landscape.

Returning water required community advocacy and engineering work together. Proposals to restore the lake had developed over decades before construction of a new weir in 2010 supported the recovery of former water conditions. The project included cultural consultation, community employment and training. A sustainable development programme initiated in 2002 and Budj Bim ranger work established in 2006 connected heritage care with ecosystem management and local livelihoods. Restoration was consequently a process of rebuilding relationships, opportunities and management capacity as well as altering a water level.

World Heritage recognition and the history of food production

Inscription on the World Heritage List on 6 July 2019 recognised three components: Budj Bim in the north, Kurtonitj in the centre and Tyrendarra in the south. It resulted from sustained Gunditjmara efforts supported by public institutions. The recognition encompasses water engineering, its environmental setting and continuing cultural knowledge and connections. The inscription date records a change in international recognition and heritage status. It is not a starting date for the community’s food economy or its relationship with these places.

Budj Bim broadens agricultural history when that history is understood as the deliberate production of food. Here aquaculture required neither a cereal field nor the closed breeding of domesticated fish. It involved investing labour in habitat, regulating flows and retaining animals for later use. Protecting such a place requires attention to water and the ability to continue cultural practices, alongside preservation of stone structures. Its heritage is both material and practised: it persists through people who remain custodians of the landscape rather than simply spectators of an abandoned technology.

Questions and answers

Are all Budj Bim structures 6600 years old?

No. The early date concerns a particular channel phase at Lake Condah. Other walls, barriers and ponds were constructed or modified at different times.

Why call this system aquaculture?

Gunditjmara shaped flows and habitats, held eels in ponds and organised harvesting. This went beyond immediate capture, even though eel reproduction remained connected with the sea.

Did UNESCO recognition begin the landscape’s recovery?

No. Gunditjmara advocacy, recovery of rights and development projects preceded the inscription. Restoration of Tae Rak water conditions in 2010 came before World Heritage listing in 2019.

Sources

History of agriculture: all topics