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Original article: Crisis hídrica: Innovador proyecto que recargó pozos subterráneos con agua de lluvia deja alentadores resultados

In an environment marked by decreasing rainfall and increasing pressure on groundwater resources, the University of Talca has undertaken a pioneering project to directly recharge rural wells by injecting rainwater, yielding promising results in response to drought consequences.

This initiative was executed by the UNESCO Chair in Surface Hydrology at the University of Talca, led by academic Roberto Pizarro Tapia, and was funded by the Regional Government of Ñuble’s Innovation Fund for Competitiveness.

The project was implemented in parts of the municipalities of San Carlos, Coihueco, and Ñiquén, where the team assessed the technical feasibility of capturing winter rainwater, storing it, and then incorporating it into the subsoil through traditional wells.

Regarding the project, the director explained, “The origin of this groundbreaking initiative in South America arises from the question: What if we use the water accumulated in winter, through rainwater collection systems, to directly recharge the wells?” From that idea, the answer was yes, it is feasible,” remarked the academic.

One of the major findings from the research was demonstrating that this mechanism can supply water in the same place where it will later be used: “We recharge directly in the same well from which the water will be extracted later,” highlighted Professor Roberto Pizarro, emphasizing that this condition allows benefits to directly reach those who invest effort into implementing these works.

Additionally, utilizing rainwater in this manner fosters community collaboration since, as the expert explained, “If done by one person, it will be difficult for that benefit to be widespread. However, if a group of people does it, better water capture can be achieved.”

The Importance of Technological Transfer

This research holds particular significance in an area where the decline of aquifers has become increasingly apparent.

In this regard, the project warned that the over-exploitation of groundwater, combined with the effects of climate change, has reduced the natural recharge capacity of aquifers, negatively impacting rural communities as well as agriculture and drinking water supply.

Another key aspect documented in the study relates to the quality of the infiltrated water. As explained by the researcher from the University of Talca, regulations stipulate that the water used for recharge must be equal to or better than that present in the aquifer.

In this context, he stated that “well-stored and managed rainwater presents us with the opportunity to have very high-quality water,” reinforcing the potential of this technology as a management tool for water resources.

The challenge now is to advance the transfer and scaling of the pilot tests conducted. Professor Pizarro believes that transforming this experience into public policy “would allow for the restoration of hydrological balances and reduce pressure on aquifers,” thereby opening a concrete alternative to address the water crisis affecting vast regions of the country.

The Citizen

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