AI Generated Image
Here’s why the Lincoln Memorial Reflecting Pool went green so fast
Los Angeles Times • • nation
Key Points:
- The Lincoln Memorial Reflecting Pool, recently renovated to a blue color, has turned a phosphorescent green due to an excessive growth of algae fueled by high nitrogen and phosphorus levels from the Potomac River.
- The Potomac River's nutrient load, partly from urban and agricultural runoff and a past sewage spill, combined with high summer temperatures and the pool's darker blue color absorbing more heat, has created ideal conditions for algae proliferation.
- The National Park Service is treating the algae bloom with hydrogen peroxide and advanced nanobubble ozone technology to kill algae cells, though these methods address only the symptoms, not the root causes.
- Long-term solutions would require tackling underlying factors such as nutrient inflow, the pool's depth, and its color, which contribute to the algae-friendly environment.
- While algae are vital to aquatic ecosystems, their overgrowth in the Reflecting Pool has obscured the new blue basin and raised concerns among residents and visitors.
