A Story of Change
Towards an inclusive water management model in Argentina's Puna
As lithium exploration expands across the Puna (Andean highland grasslands), so do concerns over the future of freshwater in this fragile landscape. In the Salar de los Pastos Grandes, wetlands and shallow lakes sustain both local ecosystems and the daily lives of communities such as Santa Rosa de los Pastos Grandes.
At the same time, lithium, a mineral central to the global energy transition, has created new economic opportunities while raising questions about how water should be managed, protected, and shared.
Yet decisions on mining, water use, and environmental protection remained fragmented across provincial authorities with different mandates. In this context, the absence of significant social conflict in Pastos Grandes, unlike in other provinces, created a valuable opportunity to advance participatory mechanisms and more inclusive multi-stakeholder decision-making, while generating lessons for similar processes in other territories.
Building Shared Solutions: When dialogue needs data — and data needs trust
The proposed solution aimed to create stronger conditions for inclusive water governance early in the mining cycle in the Salar de los Pastos Grandes. At that point, there was no watershed scale tool to support a shared understanding of water availability and ecosystem dynamics among stakeholders. Existing information was fragmented, largely produced for regulatory or corporate needs, and not well suited to joint decision making.
Rather than beginning with predefined solutions, the process focused on building the technical, institutional, and relational conditions needed for meaningful engagement. This involved compiling hydroclimatic data from different actors, integrating complementary local and global datasets, and identifying key knowledge gaps to advance the construction of a watershed-scale water model. It also included stakeholder outreach and the creation of an Argentine Lithium Expert Council to support technical and institutional coordination.
A central first step was securing the commitment of diverse actors to participate in a co-construction process. This required engaging stakeholders with different interests, expectations, and incentives, including a mining company, provincial authorities, and community actors from Santa Rosa de los Pastos Grandes.
Creating the basis for practical and inclusive solutions to water governance challenges, this initiative enables territorial authorities to progressively integrate evidence into transparent and informed decisions on water use. For the mining company, it is offering a way to assess water availability at the scale required for project approval. For the community, it will help build the capacities needed for dialogue and negotiation on more equal terms. Over time, all actors will develop a broader understanding of the potential impacts on water and ecosystems beyond the scope of conventional environmental impact assessments.
Above: Community dialogue in Salar de Pastos Grandes, 2025. Unlike other parts of Salta Province, Pastos Grandes face growing pressure from lithium development without major social conflict, creating a rare opportunity to pilot more inclusive and participatory water governance in a context of fragmented institutional decision making. (Photo: MARS)
Progress and Results
Early Shifts Toward an Inclusive and Legitimate Process Based on a Common Reference Point
The most important progress during this first phase has been subtle but meaningful. As the co-development of an inclusive water management model advances in Pastos Grandes, a shared technical reference point is beginning to take shape, one that enables more consistent engagement across actors, even when their interests do not fully align.
This shift is reflected, for example, in the participation of Lithium Americas (now Lithium Argentina), the Secretariat of Mining and Energy of Salta Province, the Secretariat of Water Resources of Salta Province, and the governing committee of Santa Rosa de los Pastos Grandes, all of whom signed agreements to engage in the model co-construction process
Transparency has increasingly become a shared demand. This is evidenced by Lithium Argentina’s sharing of roughly two years of hydroclimatic data with SEI Latin America, and by subsequent discussions with the company’s technical team on how that data should be used in the watershed model. The process has also made it clear that the model’s scope, assumptions, and uncertainty must be communicated clearly to all parties.
These early shifts are already translating into tangible effects across different stakeholder groups. In the private sector, Lithium Argentina has moved beyond engagement limited to technical experts and is now involving legal and public relations functions integrating a more holistic view within the enterprise.
Participation was driven less by trust than by necessity: a shared recognition that, without collaboration, no legitimate watershed-scale understanding of water resources could be achieved.
On the public side, the Secretariat of Mining and Energy and the Secretariat of Water Resources have committed to participate on the basis that the model can support technical review, staff training, and a future validation process. The Environment Secretariat is also identified in the initial context as a relevant authority responsible for biodiversity and critical ecosystems, underscoring the need for integrated decision-making.
Community participation is also gaining a clearer role. The agreement with the governing committee of Santa Rosa de los Pastos Grandes includes support for organizing workshops and for identifying community members with specific knowledge of water resources, aquatic ecosystems, and their relationship to local livelihoods.
In parallel, the process is being technically strengthened through an expert council led by the National University of La Plata, with anticipated contributions from the National University of Salta to address gaps in endorheic watershed modelling, wetland ecology and community livelihoods in the Argentine Puna.
Progress and Results
Early Shifts Toward an Inclusive and Legitimate Process Based on a Common Reference Point
The most important progress during this first phase has been subtle but meaningful. As the co-development of an inclusive water management model advances in Pastos Grandes, a shared technical reference point is beginning to take shape, one that enables more consistent engagement across actors, even when their interests do not fully align.
This shift is reflected, for example, in the participation of Lithium Americas (now Lithium Argentina), the Secretariat of Mining and Energy of Salta Province, the Secretariat of Water Resources of Salta Province, and the governing committee of Santa Rosa de los Pastos Grandes, all of whom signed agreements to engage in the model co-construction process
Transparency has increasingly become a shared demand. This is evidenced by Lithium Argentina’s sharing of roughly two years of hydroclimatic data with SEI Latin America, and by subsequent discussions with the company’s technical team on how that data should be used in the watershed model. The process has also made it clear that the model’s scope, assumptions, and uncertainty must be communicated clearly to all parties.
These early shifts are already translating into tangible effects across different stakeholder groups. In the private sector, Lithium Argentina has moved beyond engagement limited to technical experts and is now involving legal and public relations functions integrating a more holistic view within the enterprise.
Participation was driven less by trust than by necessity: a shared recognition that, without collaboration, no legitimate watershed-scale understanding of water resources could be achieved.
On the public side, the Secretariat of Mining and Energy and the Secretariat of Water Resources have committed to participate on the basis that the model can support technical review, staff training, and a future validation process. The Environment Secretariat is also identified in the initial context as a relevant authority responsible for biodiversity and critical ecosystems, underscoring the need for integrated decision-making.
Community participation is also gaining a clearer role. The agreement with the governing committee of Santa Rosa de los Pastos Grandes includes support for organizing workshops and for identifying community members with specific knowledge of water resources, aquatic ecosystems, and their relationship to local livelihoods.
In parallel, the process is being technically strengthened through an expert council led by the National University of La Plata, with anticipated contributions from the National University of Salta to address gaps in endorheic watershed modelling, wetland ecology and community livelihoods in the Argentine Puna.
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