Abstract
This study proposes a new method for evaluating canal functions based on the concept of networking and then verifies the effectiveness of that method for the purpose of smoothly promoting upgrades to future systems and linkage with river management. To begin, it arranges thinking concerning nodes and links in order to convert a farm irrigation system into a network model based on three basic canal functions, specifically the theories of 1) delivery function, 2) collector function, and 3) connector function. Next, it creates a model of an irrigation canal network based on such thinking and then proposes a method for ranking irrigation channel links by introducing a new irrigation canal order that is based on a layered structure.
