Abstract
Recently, it has become evident that the water management system for rational distribution of irrigated water should be clarified, and facilities for water management should be introduced and arranged more pertinently.
The forms of water demand and their properties in farming land are important factors for solving the problems aforementioned, these are understood qualitatively, but their actual conditions are not clear.
Accordingly, in this study the actual conditions of the utilizing forms of intake-water in the mixed areas of a paddy and a dry field are clarified and their characteristic, and countermeasures are discussed.
A more remarkable characteristic is that intake-water can be easily directed into a paddy field.
The basic reason seems to arise from the following fact;excess water in a paddy field does not involve actual damage, and additional water in a paddy field makes easier distribution of irrigated water by other water management;on the contrary, excess water in a dry field brings about wet damage and then regulated without supervision and excess water-intake never occur.
Therefore, in mixed areas of a paddy and a dry field, it is very important to introduce check system for preventing excess distribution of irrigated water into paddy field.
