标题: An Update on Desalination Plants, in California [打印本页] 作者: choi 时间: 2-18-2015 10:49 标题: An Update on Desalination Plants, in California Jim Carlton, California Turns to the Ocean for Drinking Water; With no letup seen for drought, coastal cities build more desalination plants despite high cost. Wall Street Journal, Feb 18, 2015. www.wsj.com/articles/california-turns-to-the-ocean-for-1424215351
Quote:
"desalinated water will cost about a third more than the city’s imported freshwater supplies * * * 'It [Desalination] should be the source of last resort—and the reality is we are getting to that place of last resort,' Ms [Helene] Schneider[, mayor of Santa Barbara, California, a city of 90,000] said.
"Poseidon Water, a Boston company that develops water systems, is using $1 billion in private financing to construct a desalination plant in Carlsbad, Calif. It aims to provide the San Diego County Water Authority with about 8% of its water, at a cost up to twice that of water the agency imports from northern California.
"As of 2013, there were 26 desalination plants in California—up from 18 in 2006, according to the most recent data. Some are operated by government authorities while others are privately run.
Note:
(a) Desalination costs from a third more than, to twice as much as, the imported water. That means a couple of times more than locally produced water, if the latter can be found.
(b) "Some plants, including one near Monterey, Calif., proposed by a subsidiary of American Water Works Co. , use pipes below the ocean floor to reduce fish kill. The $343 million plant, which is nearing final regulatory approval, would produce nearly half the water needed for about 100,000 residents on the Monterey Peninsula."
(i) This is a "slant well." "Slant" because the well is neither horizontal nor vertical.
(ii) Search images.google.com with "slant well" (in quotation marks) together with desalnation--and you will view scematic representations.