A Situational Study of Undrained Water Using a Three-Dimensional Enclosure Model

Study on large-scale multipurpose field (I)

Abstract

In future, multipurpose fields hold great promise in farming. Multipurpose fields can be classified into two types for intensive use and for extensive use. There has been a lot of research on the intensive type, but very little on the extensive type. Accordingly, we have examined the behaviour of surface drainage using a new computer calculation method called the three-dimensional enclosure method.
The enclosure method has two calculation principles.
These are
1) Calculation of large areas is prior to that of small areas.
2) When water overflows, calculation of the overflow area is prior to that of streaming area.
By using these two principles, we can obtain an accurate and efficient computer simulation model. Provided with various inclinations and patterns of field topography, we made some calculations, and were able to grasp the effects of slopes and leveling.