Zeitschriftenartikel zum Thema „Irrigation South Australia Willunga Basin“

Reliable estimates of groundwater recharge are required for effective evaluation of management options for salinity control and high water-tables in the Riverine Plain of south-eastern Australia. This paper provides a brief description of the integrated surface and groundwater modelling approach used to estimate regional recharge rates and presents the recharge rates estimated for the Campaspe River Basin. The integrated model is a powerful management tool as it can predict the relationship between rainfall, irrigation, recharge and rises in the water-table levels. The model predicted that approximately 15% of irrigation water recharges the shallow aquifer. Approximately 6% of rainfall contributes to recharge in the irrigated areas while 4 to 5% of rainfall becomes recharge in the dryland areas. Rainfall makes a greater contribution in the irrigation areas compared to the dryland areas because irrigation predisposes the soil to recharge from rainfall. The water-table levels in the irrigation areas are currently rising at approximately 0.14 m yr-1. This rate of rise will increase faster than the increase in irrigation applications.

Improving irrigation efficiency (IE) is an approach used globally to help meet competing demands for water and facilitate reallocation of water between sectors. In the Murray–Darling Basin in Australia, the Australian government has invested heavily in IE projects to recover water for the environment. However, this approach has been seriously questioned, out of concerns that improved IE would reduce irrigation return flows to rivers and therefore offset water recovery. In this study, we use a water balance model to assess the impact of the IE projects on return flows and highlight sensitivities and uncertainties. The model enables the impact on return flows to be assessed on specific IE projects and regional characteristics. Overall, reductions in return flows are estimated to be less than 20% of the total proposed IE savings. The history of IE in the southern MDB has meant that most of the current reductions are in ground return flows. Our estimate is much lower than two previous studies, mainly due to different assumptions being used on groundwater connectivity between irrigation areas and major streams. While the IE projects significantly reduce seepage to groundwater (with off-farm and on-farm projects reducing seepage by 19% and 53% of total savings respectively), not all seepage reductions will translate to a reduction in ground return flows to rivers. A lower estimate is consistent with existing monitoring and groundwater modeling studies. In this paper, the study results are discussed in a broader context of impacts of IE projects on volumes and salinity of streams and groundwater resources.

Irrigation farmers in the Murray–Darling Basin of Australia are under considerable pressure to reduce the amount of water they use for irrigation, while sustaining production and profitability. Changing from surface to pressurised irrigation systems may provide some or all of these outcomes; however, little is known about the performance of alternative irrigation methods for broadacre annual crops in this region. Therefore, a demonstration site for comparing furrow, subsurface drip and sprinkler irrigation was established on a representative clay soil in the Coleambally Irrigation Area, NSW. The performance of maize (Zea mays L.) under the three irrigation systems was compared during the 2004–05 season. Subsurface drip irrigated maize out-performed sprinkler and furrow irrigated maize in terms of grain yield (drip 11.8 t/ha, sprinkler 10.5 t/ha, furrow 10.1 t/ha at 14% moisture), net irrigation water application (drip 5.1 ML/ha, sprinkler 6.2 ML/ha, furrow 5.3 ML/ha), net irrigation water productivity (drip 2.3 t/ML, sprinkler 1.7 t/ML, furrow 1.9 t/ML) and total water productivity (drip 1.7 t/ML, sprinkler 1.4 t/ML, furrow 1.3 t/ML). Thus, subsurface drip irrigation saved ~30% of the total amount of water (irrigation, rain, soil water) needed to produce the same quantity of grain using furrow irrigation, while sprinkler irrigation saved ~8% of the water used. The higher net irrigation with sprinkler irrigation was largely due to the lower soil water content in the sprinkler block at the time of sowing. An EM31 survey indicated considerable spatial soil variability within each irrigation block, and all irrigation systems had spatially variable water distribution. Yield variability was very high within all irrigation systems, and appeared to be more strongly associated with irrigation variability than soil variability. All irrigation blocks had large patches of early senescence and poor cob fill, which appeared to be due to nitrogen and/or water deficit stress. We expect that crop performance under all irrigation systems can be improved by improving irrigation, soil and N management.

Citrus blackfly, Aleurocanthus woglumi Ashby (Hemiptera: Aleyrodidae), is an important agricultural quarantine pest, causing substantial economic losses to citrus and many other cultivated crops. Aleurocanthus woglumi is found in tropical and subtropical regions but is presently unknown in Europe and the Mediterranean Basin. We used CLIMEX to model the potential distribution of A. woglumi under an historical climate scenario (centred on 1995), including a spatially explicit irrigation scenario. We found that A. woglumi could potentially invade the Mediterranean Basin, and south-east Asia, including Australia. There is potential for it to invade most of sub-Saharan Africa. Irrigation is revealed as an important habitat factor affecting the potential distribution of A. woglumi, increasing its potential range by 53% in Asia. Under a future climate scenario for 2050, its potential distribution increased across all continents except Africa, where potential range expansion due to relaxation of cold stresses was limited, and was offset by range decrease due to lethal heat or dry stress. As global climates warm, Europe is likely to face a substantial increase in the area at risk of establishment by A. woglumi (almost doubling under the 2050 irrigation scenario). The biosecurity threat from A. woglumi is significant in current citrus production areas and poses a challenge to biosecurity managers and risk analysts.

Woodland bird population declines in Australia have been attributed to various factors including habitat loss, fragmentation, and degradation. However, the influence of altered water availability in the landscape upon woodland bird populations has not been examined, particularly in terms of changes in flood regimes and subsequent loss of floodplain productivity. In this review, we examine the importance to woodland birds of floodplains, floods, and associated vegetation communities, highlighting potential links between declining water availability, habitat degradation, and bird populations. Floodplain woodlands and forests may be important refuges for woodland bird populations because (1) floodplain woodlands and forests comprise some of the largest and most continuous vegetation remnants in south-east Australia; and (2) floods intermittently supply water, sediment and nutrients that drive greater primary and secondary productivity than found in woodlands not subject to flooding. However, floodplains in south-east Australia have been subject to substantial flow regime change, driven predominantly by dams and irrigation water use. Consequently, habitat quality for woodland birds has been degraded, potentially exacerbating population declines. We suggest that despite such change, floodplain communities and their requisite floods remain of great importance for the persistence, productivity and diversity of woodland birds in Australian drylands. We hypothesise that (1) the influence of flooding upon primary and secondary productivity in floodplain and riparian zones is a key driver of resident bird populations, and a key determinant of nomadic/migratory bird use of a site; (2) alterations in flooding and consequent changes in productivity and condition of floodplain vegetation have contributed to observed declines in resident woodland birds in Australian drylands; and (3) the influence of flooding upon productivity extends beyond local populations of floodplain residents to non-floodplain populations via dispersal, and that floodplain woodlands often act as a source population for surrounding non-floodplain woodlands. We make several testable predictions regarding these hypotheses.

In semi-arid regions, groundwater resources play a crucial role in all economic, environmental, and social processes. However, the occurrence, movement, and recharge of these hidden and valuable resources vary from place to place. Therefore, better management practices and mapping of groundwater recharge potential zones are needed for the sustainable groundwater resources. For an example, groundwater resources in Willochra Basin are vitally important for drinking, irrigation, and stock use. This study shows the significance of the application of three decision-making approaches, including multi-influencing factor, analytical hierarchy process, and frequency ratio techniques in the identification of groundwater potential zones. A total of seven criteria, including lithology, slope, soil texture, land-use, rainfall, drainage density, and lineament density, were extracted from conventional and remote sensing data sources. The parameters and their assigned weights were integrated using Geographic Information System (GIS) software to generate recharge potential maps. The resultant maps were evaluated using the area under the curve method. The results showed that the southern regions of the Willochra Basin are more promising for groundwater recharge potential. The map produced using the frequency ratio model was the most efficient (84%), followed by the multi-influencing factor model (70%) and then the analytical hierarchy process technique (62%). The area under the curve method agreed when evaluated using published weights and rating values.

The water resources crisis facing countries of the Mediterranean Basin is reflected, in diminished form, in the semi-arid, “Mediterranean-climate” zone of Australia. Some creative solutions involving the collection, treatment, storage, retrieval and use of storm runoff to replace the component of mainssupplied water presently used for “second quality” purposes, are emerging in Adelaide, capital city of South Australia. The paper describes one initiative being taken to achieve source control of stormwater – quantity and quality – in mixed-density residential streets. The resulting streetscape is suitable for use in both “greenfields” and re-development projects. The paper explores the hydrological/hydraulic performance of the system and shows that it satisfies all theoretical- requirements for safety in the full range of flooding up to and including the “once in 100-years” event. The new streetscape holds the following advantages over conventional streetscapes : reduced peak outflows, greatly improved effluent water quality, aids “greening” of the landscape, potential for aquifer recharge where appropriate, aquiferretrieved groundwater can replace mains water used for irrigation, “nuisance” flows are fully contained (no surface appearance), major flows only occupy the swale, street residences are less flood prone and the streetscape fits more harmoniously into undulating terrain.

Abstract. Combination of reduction in the frequency, duration and magnitude of natural floods, rising saline water-table in floodplains and excessive evapotranspiration have led to an irrigation-induced groundwater mound forced the naturally saline groundwater onto the floodplain in the Lower River Murray. It is during the attenuation phase of floods that these large salt accumulations are likely to be mobilised and will discharge into the river. The Independent Audit Group for Salinity highlighted this as the most significant risk in the Murray–Darling Basin. South Australian government and catchment management authorities have developed salt interception schemes (SIS). This is to pump the highly saline groundwater from the floodplain aquifer to evaporation basins in order to reduce the hydraulic gradient that drives the regional saline groundwater towards the River Murray. This paper investigates the interactions between a river (River Murray in South Australia) and a saline semi-arid floodplain (Clarks Floodplain) significantly influenced by groundwater lowering (Bookpurnong SIS). Results confirm that groundwater extraction maintain a lower water-table and more fresh river water flux to the saline floodplain aquifer. In term of salinity, this may lead to less amount of solute stored in the floodplain aquifer. This occurs through two mechanisms; extracting some of the solute mass from the system and changing the floodplain groundwater regime from a losing to gaining one. Finally, it is shown that groundwater extraction is able to remove some amount of solute stored in the unsaturated zone and mitigate the floodplain salinity risk.

In the Murray–Darling Basin, irrigated agriculture, which produces rice, dairy, cotton and citrus, is a large consumer of water resources. Effective management of the water resource is therefore important to ensure sustainability of irrigated agriculture. In the lower Gwydir and Macquarie valleys, respectively located in northern and central New South Wales of Australia, extensive irrigated-cotton production is an important contributor to the nation’s export earnings. However, there are problems of excessive deep drainage (DD) in these regions. To address them requires soil and water quality information, but there is little quantitative information to plan for and implement improved water use efficiency. In this paper, we explore methods that could efficiently generate data on natural resources. First, we carried out an electromagnetic induction (EM38) survey to characterise broad soil profile types in the Ashley (lower Gwydir valley) and Trangie (lower Macquarie valley) districts. From the resulting apparent electrical conductivity (ECa, mS/m) data collected using an EM 38 (vertical mode of operation), soil profile sites were selected and sampled, followed by laboratory analysis carried to determine exchangeable cations and clay content. The soil data collected were analysed with a salt and leaching fraction (SaLF) model, based on specific water quality and quantity parameters, such as electrical conductivity of irrigation water (ECiw, dS/m) and rainfall (R, mm/year). Various water application rates (I) were also considered, to simulate irrigated cotton (I = 600 mm/year) and rice production (I = 1200 mm/year) as well as shallow water reservoirs (I = 1800 mm/year). For each irrigation scenario, DD values (mm/year) were estimated. An exponential function was used to describe the relationships between ECa values obtained with the EM38 and estimated DD. These relationships were then used to estimate DD at each of the EM38 survey sites, whereupon cut-off (zc) values were used for indicator transforms of the data. Using indicator kriging (IK) and various irrigation scenarios, we demonstrate the usefulness of this approach in identifying areas of high risk of DD exceeding various cut-off values (zc = 50, 75, 100 and 200 mm/year). Thus, we show where improvements in water-use efficiency could be achieved in the irrigated cotton growing districts of Ashley and Trangie.

Abstract. In the lower River Murray in Australia, a combination of a reduction in the frequency, duration and magnitude of natural floods, rising saline water tables in floodplains, and excessive evapotranspiration have led to an irrigation-induced groundwater mound forcing the naturally saline groundwater onto the floodplain. It is during the attenuation phase of floods that these large salt accumulations are likely to be mobilised and discharged into the river. This has been highlighted as the most significant risk in the Murray–Darling Basin and the South Australian Government and catchment management authorities have subsequently developed salt interception schemes (SIS). The aim of these schemes is to reduce the hydraulic gradient that drives the regional saline groundwater towards the River Murray. This paper investigates the interactions between a river (River Murray in South Australia) and a saline semi-arid floodplain (Clark's floodplain) that is significantly influenced by groundwater lowering due to a particular SIS. The results confirm that groundwater extraction maintains a lower water table and a higher amount of fresh river water flux to the saline floodplain aquifer. In terms of salinity, this may lead to less solute stored in the floodplain aquifer. This occurs through three mechanisms, namely extraction of the solute mass from the system, reducing the saline groundwater flux from the highland to the floodplain and changing the floodplain groundwater regime from a losing to a gaining one. It is shown that groundwater extraction is able to remove some of the solute stored in the unsaturated zone and this can mitigate the floodplain salinity risk. A conceptual model of the impact of groundwater extraction on floodplain salinization has been developed.

Irrigation proposals to divert water from the Paroo and Warrego Rivers in arid Australia will affect their aquatic ecosystems. These two are the last of 26 major rivers in the Murray-Darling Basin without large dams and diversions. Knowledge of the extent of their biodiversity value is critical to assessing likely impacts. During the 1990 flood, 1.73 million ha of wetlands, or 12.5% of the land surface of the Paroo and Warrego River catchments, were flooded. Flooded wetland area in the respective catchments was 781 330 ha and 890 534 ha. Most of the wetland area (97%) was floodplain, with 37 freshwater lakes (>50 ha) occupying 2.5% of the wetland area and 177 salt lakes covering 0.8%. A high diversity and abundance of biota depend on these wetlands. Only 7% of the wetland area, all in the Paroo catchment, is in conservation reserves. New South Wales has a high proportion of the wetland area on the Paroo (60%) and a substantial proportion of the wetland area on the Warrego River (23%). Queensland, the upstream state, will influence the ecology of the entire catchment areas of both river systems through its proposed water management plan. Any resulting extraction practices will have detrimental ecological consequences within a decade. Conservation of wetlands is usually site-focused and reflects a paradigm of conservation based on reservation of parcels of land. However, wetlands are dependent on water that is seldom adequately protected. Intergovernment co-operation should protect the entire catchment of the Paroo River from major diversions and stop further development on the Warrego River. This would do more for the conservation of wetlands than the formal reservation of small parts of their catchments.

Due to a combination of river regulation, dryland salinity and irrigation return, lower River Murray floodplains (Australia) and associated wetlands are undergoing salinisation. It was hypothesised that salinisation would provide suitable conditions for the accumulation of sulfidic materials (soils and sediments enriched in sulfides, such as pyrite) in these wetlands. A survey of nine floodplain wetlands representing a salinity gradient from fresh to hypersaline determined that surface sediment sulfide concentrations varied from <0.05% to ~1%. Saline and permanently flooded wetlands tended to have greater sulfide concentrations than freshwater ones or those with more regular wetting–drying regimes. The acidification risk associated with the sulfidic materials was evaluated using field peroxide oxidations tests and laboratory measurements of net acid generation potential. Although sulfide concentration was elevated in many wetlands, the acidification risk was low because of elevated carbonate concentration (up to 30% as CaCO3) in the sediments. One exception was Bottle Bend Lagoon (New South Wales), which had acidified during a draw-down event in 2002 and was found to have both actual and potential acid sulfate soils at the time of the survey (2003). Potential acid sulfate soils also occurred locally in the hypersaline Loveday Disposal Basin. The other environmental risks associated with sulfidic materials could not be reliably evaluated because no guideline exists to assess them. These include the deoxygenation risk following sediment resuspension and the generation of foul odours during drying events. The remediation of wetland salinity in the Murray–Darling Basin will require that the risks associated with disturbing sulfidic materials during management actions be evaluated.

Large sedimentary basins with multiple aquifer systems like the Great Artesian Basin and the Beetaloo Sub-Basin are associated with large time and spatial scales for regional groundwater flow and mixing effects from inter-aquifer exchange. This makes them difficult to study using traditional hydrogeological investigation techniques. In continental onshore Australia, such sedimentary aquifer systems can also be important freshwater resources. These resources have become increasingly stressed because of growing demand and use of groundwater by multiple industries (e.g. stock, irrigation, mining, oil and gas). The social licence to operate for extractive oil and gas industries increasingly requires robust and reliable scientific evidence on the degree to which the target formations are vertically and laterally hydraulically separated from the aquifers supplying fresh water for stock and agricultural use. The complexity of such groundwater interactions can only be interpreted by applying multiple lines of evidence including environmental isotopes, hydrochemistry, hydrogeological and geophysical observations. We present an overview of multi-tracer studies from coal seam gas areas (Queensland and New South Wales) or areas targeted for shale gas development (Northern Territory). The focus was to investigate recharge to surficial karst and deep confined aquifer systems before industrial extraction on time scales of decades up to one million years and aquifer inter-connectivity at the formation scale. A systematic and consistent methodology is applied for the different case study areas aimed at building robust conceptual hydrogeological models that inform groundwater management and groundwater modelling. The tracer studies provided (i) in all areas increased confidence around recharge estimates, (ii) evidence for a dual-porosity flow system in the Hutton Sandstone (Queensland) and (iii) new insights into the connectivity, or lack thereof, of flow systems.

AbstractFloods generate both risks and benefits. In Langhorne Creek, South Australia, a historically-embedded system of shared floodwater management exists among farmers, who rely on semi-regular flood inundations as part of the region’s hydrosocial terroir – a dynamic conjunction of water, landscape, social relations and agricultural practice. Unruly floods coexist with a heavily regulated and precisely measured system of modern water management for viticultural irrigation across the region. Since the mid-twentieth century, groundwater extraction and new pipeline schemes have linked Langhorne Creek to the Murray Darling Basin water management system, which has displaced flooding as the primary source of irrigation water. The associated modernist shift towards the rationalization of water as a measurable resource has acted to sideline flood irrigation. Yet, floods maintain important viticultural, ecological and social roles in Langhorne Creek, adding to the flexibility and resilience of the region in response to water management challenges. The system involves technological and infrastructural components, such as flood gates and channels, but also relies upon the cooperation and coordination of community members. Local vignerons suggest that flood irrigation is environmentally as well as economically beneficial, rejuvenating riparian wetlands along watercourses. A more formal acknowledgement of the specific regional experiences of water management in a wine region like Langhorne Creek helps to fill a gap between emplaced and hydrosocial understandings of flood irrigation and broader assumptions about flooding as wasteful and inefficient.

Conventional agriculture currently relies on the intensive and expansive growth of a small number of monocultures, this is both risky for food security and is causing substantial environmental degradation. Crops are typically grown far from their native origins, enduring climates, pests, and diseases that they have little evolutionary adaptation to. As a result, farming practices involve modifying the environment to suit the crop, often via practices including vegetation clearing, drainage, irrigation, tilling, and the application of fertilizers, pesticides, and herbicides. One avenue for improvement, however, is the diversification of monoculture agricultural systems with traditional foods native to the area. Native foods benefit from evolutionary history, enabling adaptation to local environmental conditions, reducing the need for environmental modifications and external inputs. Traditional use of native foods in Australia has a rich history, yet the commercial production of native foods remains small compared with conventional crops, such as wheat, barley and sugarcane. Identifying what native crops can grow where would be a first step in scoping potential native food industries and supporting farmers seeking to diversify their cropping. In this study, I modeled the potentially suitable distributions of 177 native food and forage species across Australia, given their climate and soil preferences. The coastal areas of Queensland's wet tropics, south-east Queensland, New South Wales, and Victoria were predicted to support the greatest diversity of native food and forage species (as high 80–120 species). These areas also correspond to the nation's most agriculturally intensive areas, including much of the Murray-Darling Basin, suggesting high potential for the diversification of existing intensive monocultures. Native crops with the most expansive potential distribution include Acacia trees, Maloga bean, bush plum, Emu apple, native millet, and bush tomatoes, with these crops largely being tolerant of vast areas of semi-arid conditions. In addition to greater food security, if diverse native cropping results in greater ecosystem service provisioning, through carbon storage, reduced water usage, reduced nutrient runoff, or greater habitat provision, then payment for ecosystem service schemes could also provide supplemental farm income.

Introduction Ngarrindjeri futures depend on the survival of the land, waters, and other interconnected living things. The Murray-Darling Basin is recognised nationally and internationally as a system under stress. Ngarrindjeri have long understood the profound and intricate connection of land, water, humans, and non-humans (Trevorrow and Hemming). In an effort to secure environmental sustainability the Ngarrindjeri Regional Authority (NRA) have engaged in political negotiations with the State, primarily with the Department of Environment and Natural Resources (DENR), to transform natural resource management arrangements that engage with an ethics of justice, redistribution, and recognition (Hattam, Rigney and Hemming). In 1987, prior to the formation of the NRA, Camp Coorong: Race Relations and Cultural Education Centre was established by the Ngarrindjeri Lands and Progress Association in partnership with the South Australian Museum and the South Australian Education Department (Hemming) as a place for all citizens to engage with the values of a land ethic of care. The complex includes a cultural museum, accommodation, conference facilities, and workshop facilities for primary, secondary, and tertiary education students; it also serves as a base for research and course development on Indigenous and Ngarrindjeri culture and history (Hattam, Rigney and Hemming). Camp Coorong seeks to share Ngarrindjeri cultural values, knowledges, and histories with students and visitors in order to “improve relations between Aboriginal and non-Aboriginal people with a broader strategy aimed at securing a future for themselves in their own ‘Country’” (Hemming 37). The Centre is adjacent to the Coorong National Park and 200 km South-East of Adelaide. The establishment of Camp Coorong on Ngarrindjeri Ruwe/Ruwar (land/body/spirit) occurred when Ngarrindjeri Elders negotiated with the Department of Education and Children’s Services (DECS) to establish the race relations and cultural education centre. This negotiation was the beginning of many subsequent negotiations between Ngarrindjeri, local, State, and Federal governments about reclaiming ownership, management, and control of Ngarrindjeri lands, waters, and knowledge systems for a healthy Country and by implication healthy people (Hemming, Trevorrow and Rigney). As Elder Tom Trevorrow states: The waters and the seas, the waters of the Kurangh (Coorong), the waters of the rivers and lakes are all spiritual waters…The land and waters is a living body…We the Ngarrindjeri people are a part of its existence…The land and waters must be healthy for the Ngarrindjeri people to be healthy…We say that if Yarluwar-Ruwe dies, the water dies, our Ngartjis die, the Ngarrindjeri will surely die (Ngarrindjeri Nation Yarluwar-Ruwe Plan 13). Ruwe/Ruwar is an important aspect of the public pedagogy practiced at Camp Coorong and by the Ngarrindjeri Regional Authority (NRA). The NRA’s nation building activities arise from negotiated contractual agreements called KNYs: Kungan Ngarrindjeri Yunnan (Listen to Ngarrindjeri people talking). KNYs establish a vital aspect of the NRA’s strategic platform for political negotiations. However, the focus of this paper is concerned with local Indigenous experience of teaching and experience with the education system rather than the broader Ngarrindjeri educational objectives in the area. The specific concerns of this paper are the performance of storytelling and the dialectic relationship between the listener/learner (Tur and Tur). The pedagogy and place of Camp Coorong seeks to engage non-Indigenous people with Indigenous epistemologies through storytelling as a pedagogy of experience and a “pedagogy of discomfort” (Boler and Zembylas). Before detailing the relationship of these with one another, it is necessary to grasp the importance of the interconnectedness of Ruwe/Ruwar articulated in the opening statement of Ngarrindjeri Nations Yarluwar-Ruwe Plan: Caring for Ngarrindjeri Sea, Country and Culture: Our Lands, Our Waters, Our People, All Living Things are connected. We implore people to respect our Ruwe (Country) as it was created in the Kaldowinyeri (the Creation). We long for sparkling, clean waters, healthy land and people and all living things. We long for the Yarluwar-Ruwe (Sea Country) of our ancestors. Our vision is all people Caring, Sharing, Knowing and Respecting the lands, the waters, and all living things. Caring for Country The Lakes and the Coorong are dying as irrigation, over grazing, and pollution have left their toll on the Murray-Darling Basin. Camp Coorong delivers a key message (Hemming, 38) concerning the on-going obligation of Ngarrindjeri’s Ruwe/Ruwar to heal damaged sites both emotionally and environmentally. Couched as a civic responsibility, caring for County augments environmental action. However, there are epistemological distinctions between Natural Resources Management and Ngarrindjeri Ruwe/Ruwar. Ngarrindjeri conceive of the River Murray as one system that cannot be demarcated along state lines. Ngarrrindjeri Elder Uncle Matt Rigney, who recently passed away, argued that the River Murray and the Darling is embodied and that when the river is sick it impacts directly on Ngarrindjeri personhood and wellbeing (Hemming, Trevorrow and Rigney). Therefore, Ngarrindjeri have a responsibility to care for Ngarrindjeri Country and Ngarrindjeri governance systems are informed by cultural and ethical obligations to Ruwe/Ruwar of the lower Murray River, Lakes and Coorong. Transmitting knowledge of Country is imperative as Aunty Ellen Trevorrow states: We have to keep our culture alive. We want access to our special places, our lands and our waters. We need to be able to protect our places, our ngatji [totems], our Old People and restore damaged sites. We want respect for our land and our water and we want to pass down knowledge (cited in Bell, Women and Indigenous Religions 3). Ruwe/Ruwar is an ethic of care where men and women hold distinctive cultural and environmental knowledge and are responsible for passing knowledge to future generations. Knowledge is not codified into a “canon” but is “living knowledge” connected to how to live and how to understand the connection between material, spiritual, human, and non-human realms. Elders at Camp Coorong facilitate understandings of this ontology by sharing stories that evoke questions in children and adults alike. For settler Australians, the first phase of this understanding begins with an engagement with the discomfort of the colonial history of Indigenous dispossession. It also requires learning new modes of “re/inhabition” through a pedagogy informed by “place-consciousness” that centralises Indigenous connection to Country (Gruenewald Both Worlds). Many settler communities embody a dualist western epistemology that is necessarily disrupted when there is acknowledgment from whence one came (Carter 2009). The activities and stories at Camp Coorong provide a positive transformative pedagogy that transforms a possessive white logic (Moreton-Robinson) to one of shared cultural heritage. Ngarrindjeri epistemologies of connection to Country are expressed through a pedagogy of storytelling at Camp Coorong. This often occurs during weaving, making feather flowers, or walking on Ngarrindjeri Country with visitors and students. Enactments such as weaving are not simply occupational or functional. Weaving has deep cultural and metaphorical significance as Aunty Ellen Trevorrow states: There is a whole ritual in weaving. From where we actually start, the centre part of a piece, you’re creating loops to weave into, then you move into the circle. You keep going round and round creating the loops and once the children do those stages they’re talking, actually having a conversation, just like our Old People. It’s sharing time. And that’s where our stories were told (cited in Bell, Ngarrindjeri Wurruwarrin 44). At Camp Coorong learning involves listening to stories while engaging with activities such as weaving or walking on Country. The ecological changes and the history of dispossession are woven into narrative on Country and students see the impact of the desecration of the Coorong, Lower Murray and Lakes and lands. In this way the relatively recent history of colonial race relations and contemporary struggles with government bureaucracies and legislation also comprise the warp and weave of Ngarrindjeri knowledge and connection to Country. Pedagogy of Experience A pedagogy of experience involves telling the story of Indigenous peoples’ sense of “placelessness” within the nation (Watson) as a story of survival and resistance. It is through such pedagogies that Ngarrindjeri Elders at Camp Coorong reconstruct their lives and create agency in the face of settler colonialism. The experiences of growing up in Australia during the assimilation era, fighting against the State on policies that endorsed child theft, being forced to live at fringe camps, experiencing violent racisms, and, for some, living as part of a diaspora in one’s own Country is embedded in the stories of survival, resilience and agency. “Camp Coorong began as an experiment in alternative teaching methods developed largely by George Trevorrow, a local Ngarrindjeri man” (Hemming 38). Classroom malaise was experienced by Ngarrindjeri Elders from Camp Coorong, such as Uncle Tom and Aunty Ellen Trevorrow and the late Uncle George Trevorrow, Aunty Alice Abdulla, and others when interacting or employed in schools as Aboriginal Education Workers (AEWs). It was the invisibility of these Elders’ knowledges inside schools that generated the impetus to establish Camp Coorong as a counter-institution. The spatial dimension of situationality, and its attention to social transformation, connects critical pedagogy to a pedagogy of place at Camp Coorong. Both discourses are concerned with the contextual, geographical conditions that shape people, and the actions people take to shape these conditions (Gruenewald, Both Worlds). Place-based education at Camp Coorong advocates a new localism in order to stimulate community revitalisation and resistance to globalisation and commodity capitalism. It provides the space and opportunity to develop the capacity for inventiveness and adaptation to changing environments and resistance to ecological destruction. Of concern to the growing field of place-based education are how to promote care for people and places (Gruenewald and Smith, xix). For Gruenewald and Smith this requires decolonisation and developing sensitivity to forms of thought that injure and exploit people and places, and re/inhabitation by identifying, conserving, and creating knowledge that nurtures and protects people and places. Engaging in a land ethic of care on Country informs the educational paradigm at Camp Coorong that does not begin in front of bulldozers or under police batons at anti-globalisation rallies, but in the contact zones (Somerville 342) where “a material and metaphysical in-between space for the intersection of multiple and contested stories” (Somerville 342) emerge. Ngarrindjeri knowledge, environmental knowledge, scientific knowledge, colonial histories, and media representations all circulate in the contact zone and are held in productive tension (Carter). Decolonising Pedagogy and Pedagogies of Discomfort The critical and transformative aspects of decolonising pedagogies emerge from storytelling and involve the gift of narrative and the enactment of reciprocity that occurs between the listener and the storyteller. Reciprocity is based on the principles of interconnectedness, balance, and the idea that actions create corresponding action through the gift of story (Stewart-Harawira). Camp Coorong is a place for inter-cultural dialogue through storytelling. Being located on Ngarrindjeri Country the non-Indigenous listener is more able to “hear” and at the same time move along a continuum of a) disbelief and anger about the dispossession of Indigenous peoples; b) emotional confusion about their own sense of belonging in Australia; c) shock at the ways in which liberal western society’s structural privilege is built on Indigenous inequality on the grounds of race and habitus (Bordieu and Passeron); then, d) towards empathy that is framed as race cognisance (Aveling). Stories are not represented through a sanguine vision of the past, but are told of colonisation, dispossession, as well as of hope for the healing of Ngarrinjderi Country. The listener is gifted with stories at Camp Coorong. However, there is an ethical obligation to the gifting that learners may not understand until later and which concern the rights and obligations fundamental to notions of deep connection to Country. It is often in the recount of one’s experience at Camp Coorong, such as in reflective journals or in conversation, that recognition of the importance of history, social justice, and sovereignty are brought to light. In the first phase of learning, non-Indigenous students and teachers may move from uncomfortable silence, to a space where they can hear the stories and thereby become engaged listeners. They may go through a process of grappling with a range of issues and emotions. There is frustration, anger, and blame that knowledge has been omitted from their education, and they routinely ask: “How did we not know this history?” In the second stage learners tend to remain outside of the story until they are hooked by an aspect that draws them into it. They have the choice of engagement and this requires empathy. At this stage learners are grappling with the antithetical feelings of guilt and innocence; these feelings emerge when those advantaged and challenged by their complicity with settler colonialism, racism, and the structural privilege of whiteness start to understand the benefits they gain from Indigenous dispossession and ask “was it my fault?” Thirdly, learners enter a space which may disavow and dismiss the newly encountered knowledge and move back into resistance, silence, and reluctance to hear. However, it is at this point that a choice emerges. The choice to engage in the emotional labour required to acknowledge the gift of the story and thereby unsettle white Australian identity (Bignall; Boler and Zembylas). In this process “inscribed habits of attention,” as described by Boler and Zembylas (127), are challenged. These habits have been enabled by the emotional binaries of “us” and “them”. The colonial legacy of Indigenous dispossession is an emotive subject that disrupts national pride that is built on this binary. At Camp Coorong, discomfort is created during the reiteration of stories and engagement in various activities. Uncertainty and discomfort are necessary parts of restructuring the emotional habitus and reconstructing identity. The primary ethical aim of a pedagogy of discomfort is the creation of contestability. The learner comes to understand the rights and obligations of caring for Country and has to decide how to carry the story. Ngarrindjeri ethics of care inspire the learner to undertake the emotional labour necessary to relocate their understanding of identity. As a zone of cultural contestation, Camp Coorong also enables pedagogies that allow for critical reflection on common educational practices undertaken by educators and students. Conclusion The aim of the camp was to overturn racism and provide employment for Ngarrindjeri on Country (Hemming, 38). Students and teachers from around the state come to Camp Coorong and learn to weave, make feather flowers, and listen to stories about Ngarrindjeri Country whilst walking on Country (Hemming 38). Camp Coorong fosters understanding of Ngarrindjeri Ruwe/Ruwar and at the same time overturns essentialist notions developed by deficit theories that routinely remain embedded in the school curriculum. Camp Coorong’s anti-racist epistemology mobilises an Indigenous pedagogy of storytelling and experience as a decolonising methodology. Learning Ngarrindjeri history, cultural heritage, and land ethic of care deepens students’ understanding of connecting to Country through reflection on situations, histories, and shared spaces of human and non-human actors. Pedagogies of discomfort also inform practice at Camp Coorong and the intersections of theory and practice in this context disrupts identity formations that have been grounded in a white colonial construction of nationhood. Education is a means of social and cultural reproduction, as well as a key site of resistance and vehicle for social change. Although the analysis of domination is a feature of critical pedagogy, what is urgently required is a language of hope and transformation understood from a Ngarrindjeri standpoint; something that is achieved at Camp Coorong. Acknowledgments I would like to acknowledge the process of collaboration that occurred at Camp Coorong with Aunty Ellen Trevorrow, Aunty Alice Abdulla, and Deborah Rankine. The key ideas were established in conversation and the article was revised on subsequent occasions whilst at Camp Coorong with the aforementioned authors. This paper was produced as part of the Australian Research Council Discovery Project, ‘Negotiating a Space in the Nation: The Case of Ngarrindjeri’ (DP1094869). 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