14 
now being prepared, and should be given to the public within 
the next few months. These data will give the daily, monthly, 
and annual discharge of such streams as have been under in- 
vestigation, and should furnish abundant proof of the necessity 
of forest cover as a stream discharge regulator. These reports 
will also show the amount of water that is being utilized, and 
the amount being wasted at a number of localities. In a num- 
ber of cases seepage loss of irrigation ditches is also given. 
“Tt is estimated that, during the drought of the past year on 
Kauai, enough water was wasted through lack of proper regu- 
lations to have increased the value of the sugar output of that 
island by more than one million dollars. 
‘From rainfall records available it is believed that sufficient 
rainfall is precipitated on the Hawaiian Islands to supply all 
possible needs, if the forests are properly maintained to regu- 
late the run-off of this rainfall. 
“The forestry and hydrographic operations are so closely re- 
lated that the two services should be maintained in the closest 
possible form of cooperation. 
“The development and conservation of Hawaii’s water re- 
sources demand the following operations: 
1. The maintenance of the forests over the heavy rainfall 
catchment areas to regulate streams and to prevent erosion. 
2. The construction and maintenance of stream discharge 
measuring stations at points at which water supplies mav be 
diverted for irrigation, city supply, power or other purposes. 
This means that these stations should be installed at points 
now inaccessible by most of the roads and trails, and that clock 
registers, which give continuous records of stream fluctuations, 
should be installed. Trails should also be built in order that 
the stations are accessible at all times, and cable or foot bridges 
should be constructed for flood measurements. 
3. Climatological and meteorological stations should be con- 
structed and maintained at different elevations in the rainfall 
and forest cover areas to measure the rainfall, evaporation, tem- 
perature, mud, sunshine, ete. These will also require the 
construction of many miles of trails. 
4. After the surface water investigation is well under wav 
an investigation of underground water resources should he 
made.” 
Tt will be made apparent from the above communication that 
the Hydrographic work and that of Forestry as already or- 
