水田用水量算定における浸透による団地区分のあり方について

抄録

In the classification of paddy field for the duty of water, the ammount of percolation water has been determined by some factors (mechanical texture of soil, permeability and height of ground water table), which are not united to a single value.
The authors offered a new classification of paddy field, in which the amount of percolation is not related to any index properties of soils separately, but to the genetic classification of paddy field. The results of survey in 4, 000ha. paddy field showed that our idea is applicable. Still more, the genetic classification is considered to be an essential base of hydrology on alluvial plain.