Therefore, these data have not been used for this report. The 

 data collected In 19[?9 and i960 are considered representative of 

 evapotransplration from hlp;h water table meadov; pasture, and are 

 reported herein. 



Coleville Evapotransplrometer Measurements . In 1957, 

 data on high water table meadow pasture were collected from an 

 evapotransplrometer tank near Coleville in the Lassen-Alpine area. 

 The measurement site was located at the eastern ed^e of the State, 

 at a latitude of about 38° 30", at an elevation of 5,100 feet. The 

 site was similar to the Alturas-Dorris Ranch site in vegetation and 

 in Irrigation methods. The field was subject to long irrigations 

 by wild flooding. The v;ater level at this site varied from O-16 

 inches below the ground surface, and was usually about 8 inches 

 below the ground surface. A cylindrical steel evapotransplrometer, 

 36 inches in diameter by 3 feet deep, was installed. Water was 

 supplied to the evapotransplrometer from a supply tank floated on 

 the water table surrounding the evapotransplrometer. With this 

 system the water table inside the evapotransplrometer was kept at 

 essentially the same level as that in the field. Moisture utilised 

 by the plants was constantly replaced from the supply tank. The 

 level of the supply tank v;as recorded on a Stevens v/ater stage re- 

 corder. The field water table level was also measured on a separate 

 recorder. By integration of the two charts, the rate of evapotranspl- 

 ration was determined* 



The topography in the area is smooth, with a 2 percent 

 northerly slope. Data were collected at this site for one season 

 in connection with an investigation of water use in watersheds in 

 the eastern Sierra Nevada. 



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