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BIENNIAL REPORT. 



The detailed biennial report for the period ending June 30, 1915, 

 was completed except for some descriptive matter, and will be 

 ready for the printer in the near future. 



Stream and ditch discharge data and rainfall records are now 

 available for distribution in blue print form to interested parties. 



Very respectfully, 



G. K. Larrison, 

 Superintendent of Hydrography. 



REPORT FOR APRIL. 



Honolulu, Hawaii, May 11, 1916. 



Board of Commissioners of Agriculture and Forestry, Honolulu, 

 Hawaii. 



Gentlemen : — The following report of operations of the Divi- 

 sion of Hydrography during April, 1916, is submitted: 



weather conditions. 



The drought that began in March and which had begun to 

 seriously affect crops in many localities was broken by the heavy 

 rains during the last week of the month. 



The first half of the month was very dry on all islands. During 

 the week ending April 22, abundant rain fell in most districts in 

 Hawaii, and in the Makawao and Hana districts of Maui. 



All islands received a heavy rainfall during the last week of 

 the month, and in many localities severe thunderstorms occurred. 



federal inspection. 



Mr. N. C. Grover, chief hydraulic engineer, water resources 

 branch. United States Geological Survey, completed his inspec- 

 tion of the work being done in the Islands and sailed for thfe 

 mainland on April 4, 1916. 



Mr. Grover made especial comment on the necessity of making 

 definite plans for augmenting and safeguarding the water supply 

 of the city of Honolulu, and of the necessity for intensive inves- 

 tigations looking toward the storage of flood waters for irriga- 

 tion of semi-arid lands suitable for sugar cane but now lying idle 

 on account of lack of water. 



special KAUAI WORK. 



At the request of the Governor of Hawaii, the Superintendent 

 of Hydrography accompanied His Excellency to Kauai to be 



