12 CONTENTS — PART I 



LIST OF TABLES 



Table Page 



1. Monthly temperatures, rainfall and miles of wind movement at Santa Ana 



station 36 



2. Monthly temperatures, rainfall and miles of wind movement at Prado station 37 



3. Monthly temperatures, rainfall and miles of wind movement at San Ber- 



nardino station 38 



4. Rainfall by storms at Santa Ana station 39 



5. Rainfall by storms at San Bernardino station 39 



6. Installation data on tanks used at Santa Ana station 42 



7. Installation data on tanks used at San Bernardino station 45 



S. Analyses of station water supplies and water from annular spaces of soil 



moisture tanks at Santa Ana and San Bernardino stations 47 



9. Alkali salt concentrations and pH values of composite soil samples from 

 various depths in soil moisture tanks at the Santa Ana and San Bernar- 

 dino stations 48 



10. Relation of soil moisture to depth of water table in tanks at Santa Ana 



station 51 



11. Record of weekly evaporation from soil and use of water by salt grass in 



tanks at Santa Ana, California, May, 1929, to September, 1930__Between 52-53 



12. Record of weekly use of water by salt grass in tanks at Santa Ana, 



California, October, 1930, to November, 1931 Between 52-53 



13. Summary showing monthly use of water by salt grass and tules and evapo- 



ration from soil and water surfaces, May, 1929, to April, 1930, in tanks 



at Santa Ana, California Between 52-53 



14. Summary showing monthly use of water by salt grass, tules, cat-tails, 



willows and wire rush and evaporation from soil and water surfaces, 

 May, 1930, to April, 1931, in tanks at Santa Ana, California__Between 52-53 



15. Summary showing monthly use of water by salt grass, tules, cat-tails, 



willows and wire ru.sh, and evaporation from water surfaces, May, 1931, 



to April, 1932, in tank at Santa Ana, California Between 52-53 



16. Record of weekly u.se of water bv Bermuda grass in tanks at San Bernar- 



dino, California, May, 1929, to September, 1930 54-55 



17. Record of weekly use of water by Bermuda grass in tanks at San Bernar- 



dino, California, October, 1930, to November, 1931 56 



18. Summary showing monthly use of water by Bermuda grass and evaporation 



from "water surfaces. May, 1929, to April, 1930, in tanks at San Ber- 

 nardino, California Between 58-59 



19. Summary showing monthly use of water by Bermuda grass and tules and 



evaporation from water surfaces, May, 1930, to April, 1931, in tanks at 

 San Bernardino, California Between 58-59 



20. Summary .showing monthly use of water by Bermuda grass and tules and 



evaporation from water surfaces. May, 1931, to April, 1932, in tanks 



at San Bernardino, California Between 58-59 



21. Estimated consumptive use of water by tules and cat-tails in swamps based 



upon tank experiments and percentage of swamp use to tank use 63 



22. Summary of tank investigations showing estimated annual consumptive use 



of water in moist areas •' 67 



23. Mechanical analyses of soil from tanks at Santa Ana and San Bernardino 



stations 68 



24. Moisture equivalents of soil from tanks at Santa Ana and San Bernardino 



stations 69 



25. Comi>ari.son of the computed specific yield of soils in the absence of a water 



table with the observed specific yield of the same soils having high water 

 tables — 71 



26. Porosity, specific yield and specific retention of soils in tanks having high 



water tables 72 



27. Apparent specific gravity of soils in tanks at Santa Ana and San Bernardino 



stations. 73 



28. Monthly summary showing evaporation, consumptive use of water from 



tule tanks, use of water expressed in per cent of evaporation, wind move- 

 ment, rainfall, and temperatures at Victorville station, February ], 1931, 

 to February 28, 1933 82 



29. Evaporation from free water surfaces in the Weather Bureau pan and 



tanks Nos. 1, 2, and 3, December 5, 1930, to January 29, 1931 85 



