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1980 2000 2020 

 Time Horizon 



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Jun 1 Jul 'Aug' Sep 

 1966 



Figure 5. Projected average daily water demands for the Washington, metro- 

 politan area until the year 2030. See Table 3 for explanation of null and 

 baseline projections and projected water demands based on various conserva- 

 tion scenarios. Lower graph depicts daily discharge of the Potomac River 

 at the Washington D.C., gauging station from June-September 1966; the lowest 

 summer flow on record. Peak summer withdrawal for the Washington Metropolitan 



area was 488 on 18 July 1974; 

 1966. 



minimum; low flow was 388 mgd on 10 September 



161 



