Stuttgart – As global temperatures continue increasing and authorities start seriously considering more eco-friendly energy sources, one solution is emerging to address both pollution and water loss.
In 2015, California faced a severe drought, prompting then-Governor Jerry Brown to order a 25% reduction in home water use. With climate change becoming an increasing concern, Brown also set a goal for the state to obtain half of its energy from renewable sources.
During this time, entrepreneurs Jordan Harris and Robin Raj proposed a novel idea: installing solar panels over irrigation canals to address water loss and climate pollution. Despite the potential benefits, the concept received little support initially.
Fast forward eight years, and the landscape has changed dramatically. Devastating heatwaves, record-breaking wildfires, and looming water crises on the Colorado River have heightened the urgency to combat climate change.
Harris and Raj’s company, Solar AquaGrid, is now preparing to break ground on the first solar-covered canal project in the United States.
The idea behind solar panels on canals is simple: by placing solar panels over canals in sunny, water-scarce regions, evaporation is reduced, and electricity can be generated.
A study by the University of California, Merced estimated that if California’s 4,000 miles of canals were covered with solar panels, it could save 63 billion gallons of water and generate 13 gigawatts of power – enough to power the entire city of Los Angeles from January through early October.
The momentum for the idea has been building. Jordan Harris, a former record label executive, and Robin Raj, an organizer of socially responsible and sustainability campaigns, understood the need for credible research to garner support.
They secured funding for UC Merced to study the impact of solar-covered canals, and the results have now caught the attention of California Governor Gavin Newsom.
The Turlock Irrigation District, an entity that also provides power, has also expressed interest in the concept. It was seeking a solar project to meet California’s goal of 100% renewable energy by 2045, but expensive land costs made building on existing infrastructure more attractive.
Additionally, the shade provided by the panels could potentially reduce weed growth in the canals, saving the utility significant annual costs.
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With the support of the state, the pilot project evolved into a collaboration among the private, public, and academic sectors. Approximately 1.6 miles (2.6 kilometers) of canals, ranging from 20 to 110 feet wide, will be covered with solar panels positioned between five and 15 feet off the ground.
The research team at UC Merced will study various impacts, including evaporation rates and water quality, before making recommendations for wider implementation.
Although California is among the pioneers of this technology, India already took the lead in implementing a large-scale solar canal project. The Sardar Sarovar dam and canal project in Gujarat state promised thousands of kilometers of solar canals, but due to high capital costs and maintenance challenges, only a few smaller projects have been completed.
While the concept of solar panels on canals faces challenges, it has gained support from numerous climate advocacy groups, and other regions are also exploring the possibilities.
The Gila River Indian Tribe in the United States and the Salt River Project in Arizona are also looking into implementing similar projects to conserve water and generate renewable energy.
Despite facing resistance from traditional water infrastructure systems, advocates like Representative Jared Huffman continue to push for wider adoption of solar panels on canals, touting the technology’s potential to generate clean energy and reduce water evaporation significantly.
As solar-covered canal projects take root and gather data, the promise of this solution grows stronger, offering a potentially brighter and more sustainable future for water-scarce regions worldwide.
