About KATAYAMA KAZUSHIGE
About KITAHARA HIKARU
About ONO HIROSHI
About 中部森林研究
About hydraulics(civil engineering)
About slope
About roughness coefficient
About surface erosion
About soil erosion
About flow velocity
About equation
About Nagano prefecture
About forest
About regression equation
About mountain slope
About hydraulic experiment
About soil loss
About surface erosion
About Forestry in general
About Soil physics
About 水理実験
About 山地斜面
About 粗度係数
About 計測