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From the Holy Cow Department: Instant Water


The most talented creative minds can draw connections between seemingly unrelated things—like diapers and a field of crops–in order to produce new solutions. That’s how Mexican chemical engineer Sergio Jesus Vaelasco created Solid Rain, a highly absorbent polymer scientifically known as potassium polyacrylate. Originally intended to make diapers more absorbent, Vaelasco’s blend can soak up water to about 500 times its size, and it looks like large salt crystals:


For landscape architects and environments designers it could mean more creative options for plants in drought-heavy areas. Solid Rain could ensure that green landscapes exist and thrive even in water-scarce urban areas, and other places where greenery has a tougher time surviving and so is conspicuously missing.

And the stuff is fairly inexpensive: For $25 you can buy a pound of it, which can go a long way—10 grams of the crystals can absorb up to a liter of water.

When full of water the crystals form a translucent gel blob that can then provide moisture to plants for up to one year, depending on the size and amount of Solid Rain used. The water never evaporates or runs off—it is only absorbed by the roots of plants. And the plants don’t absorb the polymer because it is, oddly enough, insoluble in water.


On Mexican farms, Solid Rain has showed a proven increase in crop yields by up to 300 percent. Because the product is highly efficient, doses are quite low, making them profitable for farmers. You can use 25kg per acre for a surprisingly-long stretch of up to 10 years.

Homeowners or anyone in landscape design will also find the product easy to use: For a lawn, you just mow it, make holes, place either hydrated Solid Rain or have it mixed with soil—and then bury it in the holes, cover and water. The benefits are shown here with a side-by-side comparison of two lawns. The very green one, treated with Solid Rain, is watered only 35 times per year, while the untreated, dry one, sucks up 300 waterings annually.

While the greener grass or more abundant crops is something you can see in the photos, there is an additional benefit that you can’t see:

A great benefit beyond the added moisture is the preservation of nitrogen in the soil. Because little watering is needed, the nitrogen is not as likely to be washed away. It’s been nominated for a Global Water Award by the Stockholm International Water Institute. And it’s been used in Mexico for more than a decade. It only arrived in the U.S. less than a year ago.

Since climate change is creating an increasing and troubling uncertainty in global weather patterns, Vaelasco’s invention may continue to be a critical solution for areas hit by unexpected droughts. Of course, any water conservation project is a good thing, so Solid Rain may inspire new designs for distributing the crystals in ways that could help us all—regardless of climate.


Source: Core77

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