96,000,000 black balls in the Los Angeles reservoir. why?
The main purpose wasn't to prevent evaporation...
96 million black balls covering a reservoir in Los Angeles. I thought it was for evaporation prevention, but in fact it was put in to seal something more dangerous...
YouTuber Derek Muller, who accompanied the Los Angeles Water Authority boat for the first time, introduced it on his YouTube channel Veritasium, and it has been viewed nearly 30 million times.
According to the necktie-wearing Waterworks COO, LA has bromide in the saltwater of the sandbank that is nearly impossible to remove. It's harmless in itself, as I've said over and over again, "It's harmless in itself." However, when it is oxidized by ozone treatment for disinfection, it becomes bromate, which is a carcinogenic substance.
However, we received a complaint from a beverage maker saying, "It's mixed in more than the standard value!" It turns out that it has increased (the value is 10 times higher in the video). Well, bromide combined with chlorine for disinfection becomes bromate, a carcinogen when exposed to sunlight! Knowing this, the awning was urgently needed.
However, the shade will take several years to build, the trampoline will collect bird droppings, and the black log will increase the raw material cost, so I'm worried about drinking water even if I crush it and float it. In the end, they found that the bird balls in the reservoir at the airport were perfect, so they had nearly 1 million of them made and threw them in by truck.
When introducing it, I stored water from a reservoir in a children's pool and tested the effect in advance with three things: shade, bare, and a black ball. I heard you were able to shut it down? Science, isn't it?
Why is it black?
The reason it is black is because it provides maximum sun protection. Durability is also good, and it seems that it will last for more than 10 years even under direct sunlight, while other colors only last for a year. It's a food grade material, so it's safe for the body (COO gives a performance stating that it's okay to chew on the ball), and after floating this ball, green algae no longer grow, and the amount of chlorine used to suppress the algae has been reduced. . Good things!
If the ball is too light, it will be blown away by the wind and the nearby highway will be full of balls, so I added a little water to give it some weight. No wonder the boat is slow...
Caviar and tapioca as far as the eye can see, there is no wind and no waves. When asked, "Is it as heavy as sailing peanut butter?" the bearded employee laughs, "Well, I've never done it before."
You may think that the black color will absorb heat and increase evaporation, but the bottom of the ball remains cool and the air trapped in the ball acts as an insulator, so the water temperature It seems that this one is lower? Since there is no wind, that also helps reduce evaporation, and this and that has reduced evaporation by as much as 80-90%.
Cost is also cheap
The cost is 33-34 cents per piece. Half the cost is recovered from the reduction in chlorine for disinfection and evaporation. It's cheap because it eliminates carcinogens.
Ah, I'm suddenly worried that my reservoir can't float like this black ball, but salt water is a topographical feature of Los Angeles, so I don't have to worry about reservoirs in other municipalities. It seems that.