Abstract
This paper presents the resluts of study on a fuzzy forecasting system for irrigation water.
Regarding irrigation water management of rice field, it has been previously clarified that the judgement of an administrator regarding determination of the amount of water supply is carried out, based on the mechanism of “If then algorithm” which consists of four elements, growing condition of rice: P, temperatature: T, weather condition: S and recorded water supply: Q.
On the other hand, when above-mentioned mechanism does not adjust, a past record in performance of water management, which has been learned as a precedent, by an administrator, is referred, to and the amount of water supply can be forecasted.
In this paper, in view of this fact, a new type of system forecasting the amount of irrigation water from formulation of fuzzy relation between Q and Y (past recorded water variation), under the influence of an environmental condition, P, T, and S, was studied.
To confirm that this system is available, verification was carried out by using irrigation water management record and then the system operation was clarified asing methodology.
As a result, the forecasted value showed a good correlation with the amount of irrigation water.
