313 



proper gauge height recording equipment, as on this part of the 

 investigation depend all further steps. 



Acts 56 and 57 of the 1913 legislature have made the intensive 

 study of streams and other sources of water supply in limited 

 areas possible, and it is believed that this method of procedure 

 should be followed in the future. This method has been in- 

 augurated in parts of the islands of Kauai, Oahu and Maui, and 

 by December 31, 1913, twelve of the largest sources of supply on 

 Kauai, six on Oahu and sixteen of the largest streams on Maui 

 will be equipped with automatic registers, and will be ready for 

 airther steps of the investigating work. In selecting these 

 streams those which are of the greatest economic value, or which 

 may be utilized to supply water where crops are now suffering for 

 lack of it, have Deen given preference. Should the present supply 

 of funds continue to be available, it is estimated that within eight 

 years all sources of supply will be under investigation ; installa- 

 tion and construction work will be completed, and funds will be 

 available to take up the features of investigations relative to 

 utilization and duty. Pending the installation of clock register 

 gauges, the practice of obtaining staff' gauge readings by ob- 

 servers will be continued on those streams that are now under 

 observation. 



HYDROCRAPIIIC RECORDS AND DATA. 



From past experience it has been found best to work up 

 records and data of perennial streams in annual units, and to 

 publish these records and data for periods covering calendar 

 years. Special investigations of seepage losses, reconnaissances 

 for small domestic or power investigations, etc., may be made and 

 completed within a shorter period of time, but investigations of 

 perennial streams of sufficient importance to be considered in con- 

 nection with a general hydrographic investigation are best re- 

 ported annually. For this reason monthly reports from this di- 

 vision are necessarily of a routine nature, and it is much more 

 difficult to convey information regarding the results to be obtained 

 and the ends being worked for, than in the case of other phases 

 of governmental work. 



The following is a brief report of operations on the islands of 

 Kauai, Oahu and Maui : 

 Kauai. 



"Sir. Hardy, assisted by Air. Horner, visited 30 stream-gauging 

 stations and 21 rain gauges, and made two measurements. Four 

 gauging stations were discontinued on the Kekaha, Waimea and 

 Poowaiomahaihai ditches as having served their purpose. About 

 twelve miles of trail in the Lumahai, Hanalei, Wainiha and Ka- 

 lihiwai valleys were constructed to reach suitable locations for the 

 new Stevens clock reijisters which are to be installed in October. 



