RESCHEDULING OF ALLOCATED WATER RESOURCE IN OLD IRRIGATION AND DRAINAGE SYSTEMS CASE STUDY: MOGHAN IRRIGATION AND DRAINAGE SYSTEM

摘要

Nowadays, one of the most significant challenges for managers of operating systems is change in irrigation system operation, especially for irrigation and drainage network older than 30 years. Economic progress, productivity increase, societal changes, policy perspectives, environmental concerns and development of new technology require such a change. Damages to the ecosystem due to incorrect management, revised and often downscaled availability of water resources, new cropping pattern, demand for fresh water from other sectors, etc., are some of the reasons that make the older systems of irrigation and drainage net work operation inadequate for the current needs. In this paper, some of the significant parameters that cause change in water supply and water use in irrigation systems are analyzed. For this reason Moghan irrigation and drainage network is selected as case study, because it is more than 30 years old. In recent times, there has been improvement in irrigation efficiency, rise in water demand from the industry.