排水沟设计计算11

1坡顶截水0.080374.160.180.29775242坡面排水0.091274.160.180.33816963平台排水0.079874.160.180.29589844

坡脚排水0.187674.160.180.6956208

径流系数设计降雨强度（mm/h）设计汇流量(m3/s)

排水沟类

型汇水面积（km2）序号

下底宽坡比水深沟深

0.5037721160.50.50.250.30.030.120.15625 1.0590170.5324388180.40.50.250.30.030.210.131250.9590170.3268536390.400.250.30.030.180.100000.9000001.473003538

0.600.40

0.5

0.03

0.36

0.24000

1.400000

水力坡降湿周（m）断面尺寸(m)

糙率过流量(m3/s)过流断面面积(m2)

0.147542

24.230640.13685923.928980.11111123.112040.171429

24.84425

流速系数水力半径