WATER LOSSES FROM WET AREAS 



33 



was selected after a stiidj^ of soil and ground-water conditions in the 

 vicinity. The plot lies in a level field of Bermuda grass, at some dis- 

 tance from any buildings, and has excellent exposure. 



Climatic conditions at this point are representative of the interior 

 climate of southern California, and summers are hot and dry. Winter 

 temperatures are lower than at the Santa Ana station, and rainfall is 

 greater. 



Soil used in the experiment tanks was taken in place at the station 

 site and is classified as Chino silt loam.* Although the location of the 

 station is in an area of high ground water, no evidence of alkali 

 appeared on the tank surfaces during the 3 years of operation. Fluc- 



PLATE III 



f 





•.•^%r..- 



,% 



BOARD HOUSING FOR MARIOTTE TANKS AT SAN BERNARDINO. 



tuations of ground water level, varying from 2^ to 6 feet from the sur- 

 face, occur each year, being lowest during the summer months. The 

 station is supplied with artesian w^ater from the city pumps. 



Station Equipment 



Tank equipment at the San Bernardino station is similar to that 

 at Santa Ana, although not the same in number of tanks. Four soil 

 tanks, each 23^^ inches in diameter, were set with their tops level with 

 the ground surface. Because of existing high ground water, these 

 are 40 inches in depth instead of 6 feet. Each tank is connected with 

 a ]\rariotte supply tank to furnish water to the soil tank as needed 

 and to maintain a constant water level in the soil. 



* Soil Survey of the Riverside Area, California. Bureau of Soils, U. S. Depart- 

 ment of Agriculture. 



3 — 4503 



