DECISION SUPPORT SYSTEM FOR REAL-TIME OPERATION AND MANAGEMENT OF AGRICULTURAL WATER SUPPLY

摘要

Agricultural uses approximately 48% of the total annual water use in Korea. While about 70 % of annual rainfall is received during the summer season, most agricultural water were utilized from May to Jun. Therefore irrigation facilities including reservoir, irrigation canal, pump, and etc. were installed to ensure and effi ciently manage agricultural water management. Effi cient operation of an irrigation system is important for sustainable irrigated agriculture, which is undermined due to low water effi ciency of the irrigation systems. Irrigation water management using web-based decision support system is necessary to resolve water effi ciency problem. In this study, fi rstly, automatic water gauge were installed at irrigation main and branch canals in Dongjin-River Basin, South Korea. Secondly, Water level in each canal was monitored and irrigation water supply, water delivery indicator and irrigation effi ciencies were calculated daily, weekly, monthly, and yearly for 2012 and 2013. Thirdly, Irrigation model considering intermittent irrigation was developed to compare the estimated irrigation demands to actual supplies for decision making and demand strategy. Lastly, using this model and real-time water level data, a risk-based decision support system for operating and managing of agricultural water supply were developed and evaluated. The study results suggest that It is possible to optimally manage irrigation water and make plan for effi cient agricultural water operation and management, using this decision supporting system.