Using funding from the American Recovery and Reinvestment Act of 2009, the National Park Service reconstructed the Lincoln Memorial Reflecting Pool. The pool’s water supply system was updated to eliminate stagnant water by circulating water from the Tidal Basin; the pool was formerly filled using potable water from the city.
Seems like algae and other water-borne nasties have been a thing since they started pumping the tidal basin water in.
I get it, don’t waste drinking water, but I don’t think pumping untreated water into a space without natural flow is going to work. You’re basically making stagnant water and a lovely home for algae. Unless there was a steady stream of in/out at a fairly high refresh rate, you’re going to get funk. You’re trading the consumption of water for consumption of energy to run a pump system 24/7.
Either they need to fully naturalize it by adding plants and other life that balances out things or go full chem. It would still need to be circulated. Just throwing ozone into the water ain’t gonna cut it. At that point, you may as well just run a full pool pump system (big one) and filter system with a sanitizer like chlorine or bromine. Potable water has a small amount of chlorine in it already, that’s why it wasn’t as bad with potable water.
If you start with sanitizer, I would presume that the unfinished concrete wouldn’t last long. That may be what is going on. I’m not going to give anyone credit here, but sealing the surface prior to adding sanitizer makes sense. I think there are ways to sanitize with hydrogen peroxide, but I don’t know if it would work on a scale like this. Most pools are deeper; this thing is only like 18 inches deep. That means very high evaporation relative to the total volume. Even with chlorine which deteriorates in sunlight, any sanitzing agent will will be quickly consumed. If you’re pumping in basin water with lots of organic material and then throwing chlorine into it, the result will be a lot of nitrogen trichloride aka chloramine. It smells like pool, but with this much surface area it will be REALLY smelly.
That would be a fitting result of all of this. A giant pool of chemical soup and a resultant stink so nasty that nobody can go near it.
Using funding from the American Recovery and Reinvestment Act of 2009, the National Park Service reconstructed the Lincoln Memorial Reflecting Pool. The pool’s water supply system was updated to eliminate stagnant water by circulating water from the Tidal Basin; the pool was formerly filled using potable water from the city.
Seems like algae and other water-borne nasties have been a thing since they started pumping the tidal basin water in.
I get it, don’t waste drinking water, but I don’t think pumping untreated water into a space without natural flow is going to work. You’re basically making stagnant water and a lovely home for algae. Unless there was a steady stream of in/out at a fairly high refresh rate, you’re going to get funk. You’re trading the consumption of water for consumption of energy to run a pump system 24/7.
Either they need to fully naturalize it by adding plants and other life that balances out things or go full chem. It would still need to be circulated. Just throwing ozone into the water ain’t gonna cut it. At that point, you may as well just run a full pool pump system (big one) and filter system with a sanitizer like chlorine or bromine. Potable water has a small amount of chlorine in it already, that’s why it wasn’t as bad with potable water.
If you start with sanitizer, I would presume that the unfinished concrete wouldn’t last long. That may be what is going on. I’m not going to give anyone credit here, but sealing the surface prior to adding sanitizer makes sense. I think there are ways to sanitize with hydrogen peroxide, but I don’t know if it would work on a scale like this. Most pools are deeper; this thing is only like 18 inches deep. That means very high evaporation relative to the total volume. Even with chlorine which deteriorates in sunlight, any sanitzing agent will will be quickly consumed. If you’re pumping in basin water with lots of organic material and then throwing chlorine into it, the result will be a lot of nitrogen trichloride aka chloramine. It smells like pool, but with this much surface area it will be REALLY smelly.
That would be a fitting result of all of this. A giant pool of chemical soup and a resultant stink so nasty that nobody can go near it.
They should just do what that chinese emperor of old did and fill it with mercury.
The floor of the pool is the original granite from the 1920s, but most of the structure is new concrete from 2009.