项目流量Q底部半圆半径r上部侧墙高h糙率n底坡i过水面积A湿周X水力半径R谢才系数C流速V单位(m3/s)(m)(m)(㎡)(㎡/s)数值0.806920.550.110.0150.0020.5959251.9470.3060734554.7284331.35407项目流量Q宽b水深h糙率n底坡i过水面积A湿周X水力半径R谢才系数C流速V单位(m3/s)(m)(m)(㎡)(㎡/s)数值0.132130.40.420.0150.0020.1681.240.1354838747.7774910.78647项目流量Q宽b水深h糙率n底坡i过水面积A湿周X水力半径R谢才系数C流速V边坡m单位(m3/s)(m)(m)(㎡)(㎡/s)数值219.75827.62.50.0130.000575.2534.0142.2123104587.8073752.920381梯形断面计算公式:Q=AC(Ri)1/2=1/n(Ai1/2R2/3)=1/n(A5/3i1/2/Χ2/3)U形槽渠道流量计算公式矩形断面