マニング公式による流速流量表

MKスリット側溝
１．粗度係数 n=0.013※粗度係数は、参照する基準によって異なりますので必ず確認してください。

松阪興産株式会社
MATSUSAKA
KOSAN

H29.3版

MKスリット側溝

マニング（ｍａｎｎｉｎｇ）公式による流速流量表

V = 1/n × Ｒ2/3 × I1/2
Q=A×V
V ： 流速 （m/sec)n ： 粗度係数0.013

R ： 径深 （m) = Ａ/Ｐ
2
A ： 通水断面積 （m )P ： 潤辺 （m）※8割水深

I ： 水路勾配 （‰) ※1‰（パーミル）＝0.1％
3

Ｑ ： 流量 （m /sec)

1‰(=パーミル）

1mm

水路巾

深さ

ここで，1000mm

№1呼び名2
通水断面積 Ａ（m )潤辺 Ｐ（m)
径深 Ｒ（m)2/3
Ｒ
粗度係数 n1/2
勾配Ｉ（‰）
Ｉ100.075.050.0
40.0
35.0
30.0
25.0
20.0
18.0
16.0
14.0
12.0
10.0
9.0
8.0
7.0
6.0
5.5
5.0
4.8
4.6
4.5
4.4
4.2
4.0
3.8
3.5
3.4
3.0
2.8
2.6
2.5
2.4
2.2
2.0
1.8
1.6
1.5
1.4
1.2
1.0
0.8
0.6

0.31620.27390.22360.20000.18710.17320.15810.14140.13420.12650.11830.10950.10000.09490.08940.08370.07750.07420.07070.06930.06780.0671
0.06630.06480.0632
0.0616
0.05920.05830.05480.05290.05100.05000.04900.04690.04470.04240.04000.03870.03740.0346
0.03160.02830.0245300×300
0.06860.71000.09660.21060.013

300×400
0.09260.87000.10640.22460.013

300×500
0.11661.03000.1132
0.2340
0.013

VＱ

VＱ

VＱ

5.12194.43573.62173.23933.03012.80532.56092.29052.17302.04871.91641.7742
1.6196
1.53651.44871.35511.25461.20111.1452
1.1221
1.09851.08651.07431.04961.02430.99840.9582
0.94440.88710.85700.82580.80980.79340.75970.72430.68710.64780.62730.60600.56100.51210.45810.39670.35130.30420.24840.22220.20780.19240.17560.15710.14900.14050.13140.12170.11110.10540.09930.09290.08600.08230.07850.07690.07530.07450.07360.07200.07020.06840.06570.06470.06080.0587
0.0566
0.05550.05440.05210.04960.0471
0.04440.04300.04150.03840.03510.03140.02725.46324.73133.86313.45523.23212.99232.73162.44322.31782.18532.0441
1.89251.7276
1.63891.5452
1.4454
1.3382
1.2812
1.2216
1.19691.1717
1.15891.14591.1196
1.0926
1.06491.02201.00730.94620.91410.88090.86380.84630.81030.77260.73290.69100.66910.6464
0.59840.54630.4886
0.42310.50580.43810.35770.31990.29920.27700.25290.22620.21460.20230.18920.17520.15990.15170.14300.13380.12390.1186
0.11310.11080.10840.10730.10610.10360.1011
0.0986
0.0946
0.09320.08760.08460.08150.07990.07830.07500.07150.06780.06390.06190.05980.05540.05050.04520.0391

5.69244.92974.02513.6002
3.3676
3.11782.84622.54572.41502.27692.12991.97191.8001
1.70771.61001.50601.3943
1.33491.27281.24711.22081.2075
1.19401.1666
1.1384
1.1096
1.06491.0496
0.98590.95250.91780.90000.88180.84430.80500.76370.72000.69710.67350.62350.56920.50910.44090.66370.57480.46930.41970.3926
0.36350.33180.29680.28150.26540.24830.22990.20980.19910.18770.17550.16250.15560.14840.14540.14230.14070.13920.13600.13270.12930.12410.12230.11490.11100.10700.10490.10280.0984
0.09380.08900.08390.08120.07850.0727
0.06630.05930.0514

№2呼び名2
通水断面積 Ａ（m )潤辺 Ｐ（m)
径深 Ｒ（m)Ｒ2/3
粗度係数 n
勾配Ｉ（‰）
Ｉ1/2
100.0
75.0
50.0
40.0
35.0
30.0
25.0
20.0
18.0
16.0
14.0
12.0
10.0
9.0
8.0
7.0
6.0
5.5
5.0
4.8
4.6
4.5
4.4
4.2
4.0
3.8
3.5
3.4
3.0
2.8
2.6
2.5
2.4
2.2
2.0
1.8
1.6
1.5
1.4
1.2
1.0
0.8
0.6

0.31620.27390.22360.20000.18710.17320.15810.14140.13420.12650.11830.10950.10000.09490.08940.08370.0775
0.07420.07070.06930.06780.0671
0.06630.06480.0632
0.0616
0.05920.05830.05480.05290.05100.05000.04900.04690.04470.04240.04000.03870.03740.0346
0.03160.02830.0245400×400
0.12180.94530.12880.25510.013

400×500
0.15381.10530.13910.2685
0.013

VＱ

VＱ

6.20545.37404.38793.9246
3.6712
3.39883.10272.77512.63272.48212.32182.1496
1.9623
1.86161.75511.64181.52001.45531.38751.35951.33091.31631.3016
1.27171.24101.20961.16091.1442
1.07481.03831.0006
0.9811
0.96130.92040.87750.83250.78490.76000.73420.67970.62050.55500.48060.75580.65450.53440.47800.44710.41390.37790.33800.32060.30230.28270.26180.23900.22670.21370.19990.18510.17720.16890.16550.16210.16030.15850.15480.15110.14730.14130.13930.13090.12640.12180.11940.11700.11210.10680.10130.0956
0.09250.08940.08270.07550.06750.05856.53195.65684.61874.1311
3.8643
3.57763.26592.92112.77122.61272.44402.26272.0655
1.9595
1.84751.72811.59991.53181.46051.43101.40091.38561.3701
1.33861.3063
1.2733
1.22201.2044
1.1313
1.09291.0532
1.03271.01190.96880.92370.87630.82620.79990.77280.71550.65310.58420.50591.00460.87000.71030.63530.59430.55020.50220.44920.42620.40180.37580.34800.31760.30130.28410.26570.24600.23550.22460.22000.21540.21310.21070.20580.20090.19580.18790.18520.17390.16800.16190.15880.15560.14900.14200.13470.12700.12300.11880.11000.10040.08980.0778