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http://dx.doi.org/10.5389/KSAE.2004.46.5.003

Development of Water Saving Irrigation Method Using Water Balance Model  

Sohn , Seung-Ho (경북대학교 대학원)
Chung , Sang-Ok (경북대학교 농과대학 농업토목공학과)
Publication Information
Journal of The Korean Society of Agricultural Engineers / v.46, no.5, 2004 , pp. 3-11 More about this Journal
Abstract
The objective of this study is to develop water saving irrigation method using water balance model in order to save rural water. Daily water balance components such as irrigation water, drainage water, effective rainfall, ET, and infiltration were measured in paddy fields. Model simulations were performed for different outlet heights and ponding depths. The outlet heights and the ponding depths are 2 cm, 4 cm, 6 cm, 8 cm, and 10 cm, respectively. Based on the simulation very shallow ponding depth of 2 cm with 10 cm outlet height showed the largest effective rainfall ratio and the smallest irrigation amount. Until the introduction of laser leveling dozer and automatic inlet control devices, it would be desirable to adopt 4cm ponding depth because of difficulty of land leveling and frequency of farmer's field visit. The results of this study will be applied in the paddy farming and can improve water use efficiency.
Keywords
Water saving irrigation; water balance; ET; Ponding depth; outlet weir;
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