Water pollution control measures and water quality development in the Ruhr catchment 1972-1992
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Since five million people have to rely on Ruhr water as a source for potable water supply, quality and quantity aspects of the river are very important for the region. In the last 20 years, 2.1 × 109 DM have been spent for water quality control in the Ruhr basin. The most important types of plants and the progress in river water quality are described.
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1984 ◽
Vol 16
(5-7)
◽
pp. 407-418
◽
2012 ◽
Vol 260-261
◽
pp. 659-662