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논문 기본 정보

자료유형
학술저널
저자정보
최순군 (국립농업과학원) 정재학 (Texas A&M University) 엽소진 (국립농업과학원 농업환경부 기후변화생태과) 김명현 (국립농업과학원 농업환경부 기후변화생태과) 김민경 (국립농업과학원 농업환경부 기후변화생태과)
저널정보
한국농공학회 한국농공학회논문집 한국농공학회논문집 제63권 제4호
발행연도
2021.1
수록면
55 - 64 (10page)

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The expansion of upland crop cultivation in rice paddy fields is recommended by the Korean government to solve the problem of falling rice priceand reduction of rice farmer’s income due to oversupply of rice. However, water use efficiency is significantly influenced by the land use change frompaddy field to upland. Therefore, this study aimed to evaluate the water budget of soybean grown in using APEX (Agricultural Policy andEnvironmental eXtender) model. The amount of runoff was measured in a test bed located in Iksan, Jeollabu-do and used to calibrate and validate thesimulated runoff by APEX model. From 2019 to 2020, the water budget of soybean grown in uplands were estimated and compared with the one grownin paddy fields. The calibration result of AP EX model for runoff showed that R2(Coefficient of determination) and NSE (Nash-Sutcliffe efficiency)were 0.90 and 0.89, respectively. In addition, the validated results of R2and NSE were 0.81 and 0.62, respectively. The comparative study of eachcomponent in water budget showed that the amounts of evapotranspiration and percolation estimated by APEX model were 549.1 mm and 375.8mm,respectively. The direct runoff amount from upland was 390.1 mm, which was less than that from paddy fields. The average amount of irrigation waterwas 28.7 mm, which was very small compared to the one from paddy fields.

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