Evaluation of Subsurface Drainage System for Excess Rainfall : Design on Subsurface Drainage in Paddy Fields (II)
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概要
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The performance of the subsurface drainage system was examined and evaluated for the crop diversification, the rice and the non-rice farming, in a paddy field. The subsurface drainage system is designed and installed with the design drainage rate of 20-30mm/d, about 1mm/h, to remove excess topsoil water for rice farming, usually having a 10m spacing. The same system in the non-rice farming field converted from rice farming is expected to have a ten times subsurface drainage discharge, 10mm/h, and to remove excess rainfall which corresponds to the design rate of the surface drainage for non-rice farming.
- 1994-03-31
著者
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Ogino Yoshihiko
Laboratory Of Water Utilization In Agriculture College Of Agricultural Engineering
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Ogino Yoshihiko
Laboratory Of Irrigation And Environmental Engineering College Of Agriculture Osaka Prefecture Unive
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Murashima Kazuo
Laboratory Of Utilization Of Water In Agriculture College Of Agriculture
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