TABLE OF CONTENTS 



PART II 



Page 



LETTER OF TRANSMITTAlL. 143 



ACKNOWLEDGMENT 144 



■ORGANIZATION, STATE DEPARTMENT OP PUBLIC WORKS 145 



ORGANIZATION, UNITED STATES GEOLOGICAL SURVEY 146 



GROUND WATER SUPPLY AND NATURAL LOSSES IN THE VALLEY OiF 

 THE SANTA ANA RIVER BETWEEN RIVERSIDE NARROWS AND 



THE ORANGE COUNTY LINE 147 



Description of area 147 



Purpose of investigation 14S 



Classification of bottom land 148 



Stream flow records 149 



Effect of natural losses on inflow 150 



Computation of changes in storage and corrected outflow 155 



Computation of natural losses and inflow between Hamner Avenue and 



Atchison, Topeka and Santa Fe Railway bridge stations 157 



Relation of natural losses to evaporation - 168 



Natural losses and inflow between Riverside Narrows and the Prado gaging 



station 168 



LIST OF TABLES 



Table Page 



1. Classification of bottom land along Santa Ana River, 1933 148 



2. Measurements of Santa Ana River between Riverside Narrows and Prado, 



1931 150 



3. Natural losses and inflow, in second feet, on Santa Ana River from Hamner 



Avenue to Atchison, Topeka and Santa Fe Railway bridge 160-167 



4. Relation between evaporation and natural losses for area between Hamner 



Avenue and Atchison, Topeka and Santa Fe Railway bridge on Santa 

 Ana River 169 



5. Estimated water supply of the valley of the Santa Ana River above the 



Prado gaging station, 1930-1932 171 



LIST OF PLATES 



Plate Page 



I. Map of Santa Ana River between Riverside Narrows and Prado showing 



area of natural losses, 1933 Between 148-149 



II. Typical cross-section of river channel 150 



III. Relationship of outflow to transpiration, temperature and evaporation 151 



IV. Typical gage-height record 153 



V. Location of E series of wells 154 



VI. Typical ground-water record 154 



VII. Method used in computing changes in ground-water storage Between 156-157 



VIII. Relationship between temperature, evaporation and corrected outflow 



from Hamner Avenue to Atchison, Topeka and Santa Fe Railway 158 



IX. Estimated inflow between Hamner Avenue and A., T. and S. F. Ry. 



Bridge, 1931 159 



X. Estimated inflow between Hamner Avenue and A., T. and S. F. Ry. 



Bridge, 1932 159 



XI. Water supply of Santa Ana River above Prado gaging station, 1932 170 



(142) 



