Fuzzy Support System for Gate Operations in the Barato River Basin

Abstract

The Barato River basin, located in the northern part of Sapporo City, is characterized by low-lying areas. The prevention and mitigation of flood damages in this basin are mainly controlled by the two gates; the gate of Shibi canal plays an important role in shutting off the backwater effect of the Ishikari River, while the gate of Ishikari Floodway draining out the inflow volumes from three upstream tributaries of the Barato River as fast as possible.
The current gate operations in the Barato River system are heavily relied on intuition of the experienced engineers, mainly because decision-makings should be done on complicated predictions of inflows to the Barato River, water levels of Ishikari and Barato Rivers and the tide in a river mouth.
The present study describes the basic concept of a Fuzzy support system applied to gate operations of the Barato River basin and some simulation results.