抄録
Gross efficiency is calculated from the relation between the diversion dischage and the consumptive use of crops on some laterals which serve only for upland field irrigation.
But these laterals irrigate only four percent of all the upland, therefore the whole area is also checked.
Summary of the results are as follows;
(1) Consumptive use of crops is nearly the same as that of the original plan.
(2) Effective rainfall is larger than that of the plan.
(3) Gross efficiency is 35 percent, which is much smaller than the 73 percent of the plan.
(4) Denendinz rates on each water source are;
Actual operation Plan
Main water source 34% 65%
Effective rainfall 66 35
