이앙시기 및 담수심 변화에 따른 논벼 수요량 변화 분석

초록

This study evaluated variations in the paddy rice water demand based on the continuous changing in rice transplanting period and ponding depth atthe four study paddy fields, which represent typical rice producing regions in Korea. Total 7 scenarios on rice transplanting periods were applied whileminimum ponding depth of 0 and 20 mm were applied in accordance with maximum ponding depth ranging from 40 mm to 100 mm with 20 mminterval. The weather data from 2013 to 2019 was also considered. The results indicated that the highest rice water demand occurred at high temperatureand low rainfall region. Increased rice transplanting periods showed higher rice water demand. The rice water demand for 51 transplanting days closelymatched with the actual irrigation water supply. In case of ponding depth, the results showed that the minimum ponding depth had a proportionalrelationship with rice water demand, while maximum ponding depth showed the contrary results. Minimum ponding depth had a greater impact on ricewater demand than the maximum ponding depth. Therefore, these results suggest that increasing the rice transplanting period, which reflects the currentpractice is desirable for a reliable estimation of rice water demand.

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