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青岛市人均水资源量为334立方米/年,仅为全国平均值的1/6,世界平均值的1/24。水资源短缺已经成为制约青岛市杜会经济可持续发展的主要因素之一。向大海要淡水,已成为一种必然选择。普遍缺水的现状目前,已有28个国家被列为缺水国或严重缺水国(我国就在其中)。为解决淡水问题,各国想尽了办法,如跨流域调水、节约用水、污水净化再利用等。然而这只是水资源的时空位移,并不能增加水资源的总量。于是人们将目光投向了汪洋大海。科学家们发明了多种淡化海水的方法,如蒸馏法、薄膜反渗透法、离子交换法等。
Water resources per capita in Qingdao is 334 cubic meters per year, only 1/6 of the national average and 1/24 of the world average. The shortage of water resources has become one of the main factors restricting the sustainable economic development of the city of Qingdao. To the sea to fresh water, has become an inevitable choice. The prevailing water shortage situation Currently, 28 countries have been classified as water-scarce or seriously water-stressed (my own country is in them). In order to solve the problem of freshwater, all countries have tried every means, such as inter-basin water transfer, water conservation, sewage purification and reuse. However, this is only the spatial and temporal displacement of water resources, and can not increase the total amount of water resources. So people will look to the vast ocean. Scientists have invented a variety of desalination methods, such as distillation, membrane reverse osmosis, ion exchange and so on.