About HIRASAWA SHUN
About 北海道 農政部
About KOBAYASHI HIDENORI
About 北海道農業近代化技術研究セ
About KITAGAWA IWAO
About 農研機構
About 農業農村工学会誌
About flood control
About Hokkaido
About region
About plate(material)
About impounding
About water depth
About labor saving
About disaster
About flooding(disaster)
About cultivation management
About water management
About weir
About flooding
About damage reduction
About paddy field zone
About paddyfield dam
About paddy water
About surface drainage
About Water utilization,others
About General
About 田んぼダム
About 実証試験