The quote is given as “南方水多,北方水少,如有可能,借一点也是可以的” in 作家作品:毛泽东与南水北调Archived 2013-01-20 at the Wayback Machine (Mao Zedong and the South-to-North Water Diversion Project), by Jin HUaichun (靳怀堾), at the project's official web site.
Eastern Route Project (ERP)Archived 2015-06-28 at the Wayback Machine, on the official project site; includes the map. (As one can see from the context, "956 million m³" on that page is apparently a typo for "956 billion m³").
The quote is given as “南方水多,北方水少,如有可能,借一点也是可以的” in 作家作品:毛泽东与南水北调Archived 2013-01-20 at the Wayback Machine (Mao Zedong and the South-to-North Water Diversion Project), by Jin HUaichun (靳怀堾), at the project's official web site.
Eastern Route Project (ERP)Archived 2015-06-28 at the Wayback Machine, on the official project site; includes the map. (As one can see from the context, "956 million m³" on that page is apparently a typo for "956 billion m³").