UNITED STATES FISH AND WILDLIFE SERVICE 

 CENTRAL VALLEY INVESTIGATION 



MONTHLY OCCURRENCE AND RELATIVE ABUNDANCE OF SALMON, STRIPED BASS 



AND SHAD JUVENILES AS RELATED TO THE FLOW PATTERNS IN THE DELTA 



ADJUSTED TO DELTA-MENDOTA DEMAND 



INITIAL CENTRAL VALLEY PROJECT OPERATION 1948 



JULY 4I.S X 



AUGUST 46.1 X 



CENTRAL VALLEY PROJECT 



OPERATION MODIFIED FOR 



INCREASED STORAGE 



AT FOLSOM 



1948 



JULY 41.9 X 



AUGUST 46.1 X 



INITIAL CENTRAL VALLEY PROJECT OPERATION 1949 



i I 



CENTRAL VALLEY PROJECT 



OPERATION MODIFIED FOR 



INCREASED STORAGE 



AT FOLSOM 



1949 



SEPTEMBER 8 8 X 



JULY 34.0X 



