Abstract

A water balance model for efficient water management in canal command area is developed to provide demand-based water release strategies for reducing the gap between canal supplies and demands and to help irrigation engineers, agronomics and agro-meteorologist in planning, operation and management of irrigation system efficiently. The Patna canal network of the Sone Irrigation Project in India is used as a case study. This study estimates the demand at the head of the distributaries of the canal network in advance for each irrigation cycle using historical weather data, weather forecast and crop & soil conditions. This simulation combined with strong agronomic knowledge and judgment provides a powerful impact on the overall water management strategy to be adopted in the command area of the irrigation project.

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