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Designing resilient solar projects to withstand catastrophic flooding events is a delicate balance to manage. Designs must meet or exceed code requirements, maintain structural integrity when facing extreme flood events and minimize both project capital costs and operating expenses.
The latter can be achieved by constructing solar arrays outside of expected flood areas or incorporating a structural design with adequate freeboard and structural strength to survive extreme flood events.
If flood protection design requirements do not evolve in parallel to a changing climate, solar projects may see a higher rate of flood damage than expected during their 25-to-40-year lifespan. Flooding impact on renewables The impact flooding can have on solar projects is highlighted in the photo below.
Structural design consideration for tracker stow, equipment freeboard, and pile scour protection are important to mitigate flood risk at solar projects. If flooding is expected within the solar array footprint at a project, trackers can be programmed or manually operated to rotate into a “flood stow” position.