158 



JO 1 5 Rainfall Records. 



Almost complete rainfall records for the calendar year 1915 

 show that, except for the high levels of Kauai, 1915 was a much 

 drier year than 1914. The generally heavy rainfall for Decem- 

 ber, 1915, in many cases at comparatively low levels, exceeded 

 the total precipitation for the other eleven months. 



The accompanying tabulation shows interesting records for 

 1914 and 1915 for part of the data received. 



Operation and Maintenance Work. 



Kauai. — Three new ditch measurement stations were estab- 

 lished and one discontinued. Nineteen stream and ditch meas- 

 urement stations were visited and seven regular station and three 

 miscellaneous measurements were made. About twelve days 

 were spent collecting and preparing data for the biennial report 

 and a considerable amount of trail improvement work was 

 done. 



Oahii. — Fifty-one visits were made to stream and ditch meas- 

 urement stations and five rainfall measurement stations were 

 visited. Thirty-one stream and ditch measurements were made. 

 The Kalihi, Punaluu, and Kaluanui stream measurement stations 

 were repaired. 



Maui. — G. K. Larrison spent the first five days of the month 

 on West Maui, inspecting stations damaged by the January floods, 

 and on reconnaissance of the Olowalu, Ukumehame, Lahaina- 

 luna and Kahoma streams. 



All continuous record measurement stations and one rainfall 

 measurement station were visited. 



Very respectfully, 



G. K. Larrison, 

 Superintendent of Hydrography. 



Rainfall Records for 1914 and 1915. 



Kauai. 



Elevation Rainfall in Inch. 

 Location Feet 



Mt. Waialeale 5075 



Keanakua ridge 4450 



Kohua-Kekoha ridge 3950 



Lehuamakanoi ridge 3930 



Kahana ridge 3750 



Paukahana ridge 3720 



* Partially estimated. 



