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Chung, Sang-Ok;Park, Ki-Jung
- Journal of Korea Water Resources Association
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- v.37 no.7
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- pp.517-526
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- 2004
Agricultural water plays an important role in the national water management. Irrigation return flow is the amount of irrigated water that returns to the river system. In the water resources development planing and management, an accurate estimation of the irrigation return flow is very important. In this study, a 5.5 ha small size paddy area in Kyungbuk province is selected and the water balance components are measured during the 2003 growing season. The total irrigation return flow ratio was 53.7%, of which 30.2% was rapid return flow and 23.5% was delayed return flow.
https://doi.org/10.3741/JKWRA.2004.37.7.517 인용 PDF KSCI

이남호;이훈선
- Magazine of the Korean Society of Agricultural Engineers
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- v.43 no.6
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- pp.103-112
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- 2001
The development of infrared thermometry has led many researchers to use plant temperatures, and specifically the temperature of the crop canopy in the field, for estimating the water stress of a crop. The purpose of this study was to evaluate the role of leaf temperature in irrigation scheduling. An experiment was carried out in a greenhouse with chinese cabbage. Leaf temperature was measured with infrared thermometry and evapotranspiration of the crop was measured by lysimeters. Influence of the difference between leaf temperature and air temperature on crop evapotranspiration was evaluated under varying water stress condition. A further objective was to evaluate the effect of other climatic variables on the relationship between evapotranspiration and temperature difference between leaf and air. A statistical model for estimating evapotranspiration using the temperature difference, relative humidity. and radiation was developed and tested. Crop water stress index was calculated using vapour pressure deficit and the temperature difference. Relations between the crop water stress index and crop evapotranspiration was tested. The index was closely related with evapotranspiration.
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