WATER LOSSES FROM WET AREAS 



SANTA ANA RIVER-- Typical Gage- height Record 



SANTA ANA RIVER AT 



SANTA ANA RIVER AT 



SANTA ANA RIVER AT 



SANTA ANA RIVER AT 



RIVERSIDE NARROWS 

 HAMNER AVE. 

 AUBURNOALE BRIDGE 

 AT iS.F. RY. BRIDGE 



GROUND WATER AT WELL E-3 



The root systems uear this well form the outside edge of the zone of 

 natural losses. The well is surrounded by a heavy growth of salt grass. 

 Well E-2, situated 430 feet from the river, is surrounded bv voung 

 trees. Well E-3 is only 30 feet from the edge of the river. Well E-4 

 was placed in the river at a point where it is about 130 feet wide. The 

 locations of the wells in the E group are plotted on Plate V, which 

 shows also the maximum and minimum altitude of the water table for 

 July 20, 1932. as plotted from the records obtained in these wells. 

 This plate shows the slope of the water table toward the river. Ten- 

 day records of three of these wells, together with the gage-height record 

 of the station at The Atchison, Topeka & Santa Fe Railway Bridge, have 

 been plotted on Plate YI. 



An inspection of plates TV and VI shows the marked similarities 

 between the ground water table at well E-3 and the gage-height record 

 at the railway bridge station. It appears likely that the daily fluctua- 

 tions in the river are caused chiefly by the fluctuations in the discharge 

 of ground water into the river. 



As shown on Plate I, the Lilliebridge Ditch discharges water into 

 the river above the E group of wells. For a short time on both Sep- 

 tember 5 and 6 the discharge from the ditch to the river was shut 

 down. As a result the discharge in the river dropped. Plate VI shows 

 that the water table at well E-3 immediately dropped also, even though 

 it was several tenths of a foot higher than the water in the river. As 

 shown on Plate IV. the shutting down of the ditch on July 17 caused a 

 -imilar change in the water level in well E-3. Here again, the close 

 interrelationship of the ground water and the surface water of the 

 river is apparent. 



The site of well E-t was selected because all the recorders along 

 the river were at relatively narrow sections, and it was desirable to 

 determine whether or not the daily river fluctuations at wade sections 

 would be similar to those shown on Plate IV. The season's record at 

 this well showed that daily fluctuations were entirely obscured bv tlie 



