Tabla ZS'—Apprmdmate Changes In Upstrean Watershed Population, 

 IwluBtry »«J Irrigated Area, 1910 to 1950| x 10^ 



Industry Population Equivalents are estimated. 



Table 26 . - - Chai^ In River Constituents, 1, 1000 Tons per year, 1910-1J55. 



Computed from yearly weighted average values using average flow 

 for the two time periods. 



85 



