Abstract: For further investigate the essential element of information expressed of large-scale irrigation area and constructs the overall model of irrigation area system,the system engineering method was used to analyses the information source and information flow of irrigated area.By this method,the connection and state between each element transmit the relation in the system was described systematically and a model of Information transmission and controlling of the large-scale irrigated area was constructed.The application of this model to the irrigation are informationization shows that this model has offered the feasible quantization model for realization and accurate control of the information system of irrigated area.

Key words: arge-scale irrigated area, information flow, information transmission and controlling model, irrigated area informationization

摘要： 为深入研究大型灌区的信息要素表示和构建灌区系统的整体模型，应用系统工程方法，通过对灌区信息源与信息流分析，系统地描述了系统中各个元素之间的相互联系与状态传递关系，构造了构建灌区信息传递数学模型与控制模型。在灌区信息化系统中的应用结果表明，该模型为灌区信息系统的实现与精确控制提供了可操作的量化模型。

关键词: 大型灌区, 信息流, 信息传递与控制模型, 灌区信息化