yom haatzmaut | Israel may have water-wise tips for a dry Golden Stateby karin kloosterman , israel 21c
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Last year, as winter rains filled Israel’s reservoirs and its inland lake, the Sea of Galilee, they were called heaven-sent.
But 2014 has been a different story, as a severe drought was declared by February.
Prime Minister Benjamin Netanyahu recently offered to help California overcome its extreme drought — affecting about two-thirds of its 38 million residents — using Israeli science, water conservation and desalination technology.
What makes Israel and California different and how can Israel help?
Israel has four desalination plants in operation along the Mediterranean Sea, with a fifth plant to come online in Ashdod. But desalination is only part of the story, says Avraham Israeli, president of the nonprofit Israel Water Association.
In California, he says, one important difference is that treated wastewater gets dumped back into the sea. This water may not be good for drinking but it’s perfectly good, even superior, to fresh drinking water for agriculture, as it has some added nutrients.
Using a two-system approach with pipes for both gray water and drinking water, Israeli farmers irrigate crops with gray water even in desert areas with practically no rain at all. Israel, he says, is now pushing 75 percent wastewater reuse and aiming for 90 percent.
No water from Israel’s treatment plants gets discharged into the sea. (Sewer overflow in the winter months can account for the missing numbers.)
“This could work in California if the infrastructure was built,” Israeli says. “In principle, they have to change [to] the attitude that treated water is safe and that it is a resource, especially in such a year with severe drought. They invest huge amounts of money bringing water from the Colorado River for agriculture.”
Desalination, he points out, “is a measure of coping with lack of water. It is more expensive than reclaimed water. First, treat sewage and reuse.”
Israel’s technology solutions ease the energy burdens on wastewater reuse. Companies such as Mapal Energy, Aqwise and Emefcy could help enormously in places such as California, Israeli says.
California has already started working with Israel on water issues. Israel’s IDE Technologies is building the largest seawater desalination plant in the Western hemisphere, north of San Diego. Slated for completion in 2016, it is expected to supply 50 million gallons of potable water a day. Three smaller desalination plants have opened in California, with more than a dozen proposed.
Israeli says it wont be determined until the end of the year whether 2014 will go down in history as the worst year for rainfall. “But as far back as I remember, as a kid working in the field crops in the kibbutz, I have never seen a drought like this. I don’t remember a phenomenon where I didn’t see rain from mid-December to mid-March.”
Israel’s refusal to be dependent on the rain started with Prime Minister David Ben-Gurion’s visionary construction of the country’s national water carrier in the 1950s. This enabled the state to build on a lean model and scale up water recycling as needed. Over the last 10 years, Israel began to build major desalination projects seaside. By 2013, the country declared that it had beaten the drought.
The story was reprinted with permission from Israel21c, www.Israel21c.org.
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