マニング公式による流速流量表

ロングベンチフリューム
１．粗度係数 n=0.014（水路工）２．粗度係数 n=0.013
３．粗度係数 n=0.014※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。

MATSUSAKA
KOSAN

松阪興産株式会社

ロングベンチフリューム（水路工）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
ここで，

V ： 流速 （m/sec)n ： 粗度係数0.014
R ： 径深 （m) = Ａ/ＰA ： 通水断面積 （m2)
P ： 潤辺 （m）
I ： 水路勾配 （‰) ※1‰（パーミル）＝0.1％
Ｑ ： 流量 （m3/sec)
呼び名
250,300
350,400
450,500
550,600
650

余裕高
50
60
70
80
90
1‰(=パーミル）

幅Ｂ

1mm

余裕高
深さＨ
潤辺Ｐ
通水断面積Ａ

1000mm№1
呼び名
幅Ｂ×深さＨ（mm）
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（‰）
Ｉ
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

0.31620.27390.22360.20000.18710.17320.15810.14140.13420.12650.11830.10950.10000.09490.08940.08370.07750.07420.07070.06930.06780.0671
0.06630.06480.0632
0.0616
0.05920.05830.05480.05290.05100.05000.04900.04690.04470.04240.04000.03870.03740.0346
0.03160.02830.0245250
250×175
0.02810.44590.06300.15830.0140V
Ｑ
3.5762
3.09712.52882.26182.11571.95881.78811.59931.51721.4305
1.33811.23881.13091.07281.01150.94610.87600.83870.7996
0.78350.76700.75860.75010.73290.7152
0.69710.66900.65940.6194
0.59840.5766
0.56540.55400.53040.50570.47980.45230.43800.42310.39170.35760.31980.27700.10040.08700.07100.06350.05940.05500.05020.04490.04260.04010.0376
0.03480.03170.03010.02840.02650.02460.02350.02240.02200.02150.02130.02100.02050.02000.01950.01870.01850.01740.01680.01620.01580.01550.01490.01420.01340.01270.01230.01180.01100.01000.00890.0077300
300×200
0.04070.53440.07620.17970.0140V
Ｑ
4.05983.51592.87072.56762.40182.22362.02991.81561.72241.62391.51901.40631.28381.21791.1482
1.0741
0.99440.95210.90780.88940.87070.86120.85150.83200.81190.79140.75950.74850.70310.67930.6546
0.64190.62890.60210.57410.5446
0.51350.49720.48030.44470.40590.36310.31440.16520.14300.11680.10450.09770.09050.0826
0.07380.0701
0.06600.06180.05720.05220.04950.04670.04370.04040.0387
0.03690.03610.03540.03500.0346
0.03380.03300.03220.03090.03040.02860.0276
0.0266
0.02610.02550.02450.02330.02210.02080.02020.01950.01800.01650.01470.0127350
350×235
0.05490.61860.0887
0.19890.0140V
Ｑ
4.49243.8906
3.17662.84132.65772.46062.24622.00911.90601.79691.68091.55621.4206
1.34771.2706
1.18861.10041.05351.00450.98420.96350.95300.94230.9206
0.89840.87570.84040.82830.77810.75170.72430.71030.69590.66630.63530.60270.56820.55020.53150.49210.44920.40180.34790.2466
0.21350.17430.15590.14590.13500.12330.11020.1046
0.0986
0.09220.08540.07790.07390.06970.06520.06040.05780.0551
0.05400.05280.05230.05170.05050.04930.04800.04610.04540.04270.04120.03970.03890.03820.03650.03480.03300.03110.03020.02910.02700.02460.02200.0190400
400×260
0.07240.71380.10140.21740.0140V
Ｑ
4.9116
4.25363.47303.10642.90572.69022.45582.19652.08381.9646
1.83771.7014
1.5532
1.47351.3892
1.29951.20311.15181.0982
1.07601.05341.04191.0302
1.00650.98230.95740.91880.90560.85070.82180.79190.77660.76090.72850.69460.65890.62120.60150.5811
0.53800.49110.43930.38040.35550.30790.25140.22490.21030.19470.17770.15900.15080.14220.13300.12310.11240.10660.10050.09400.08710.08330.07950.07790.07620.07540.07450.07280.0711
0.06930.06650.0655
0.06150.05940.05730.05620.05500.05270.05020.04770.04490.04350.04200.03890.03550.03180.0275

№2
呼び名
幅Ｂ×深さＨ(mm)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（‰）
Ｉ
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

0.31620.27390.22360.20000.18710.17320.15810.14140.13420.12650.11830.10950.10000.09490.08940.08370.07750.07420.07070.06930.06780.0671
0.06630.06480.0632
0.0616
0.05920.05830.05480.05290.05100.05000.04900.04690.04470.04240.04000.03870.03740.0346
0.03160.02830.0245450
450×295
0.09210.8086
0.11390.23500.0140V
Ｑ
5.30744.59643.75293.3567
3.13992.90702.65372.37352.25172.12291.98581.8385
1.67831.5922
1.50111.40421.30001.24471.1867
1.16281.13831.1258
1.11331.08771.06141.0346
0.99290.97860.91920.88810.85580.83910.8222
0.78720.75050.71200.67130.65000.62790.58140.53070.47470.4111

0.48880.42330.34560.30910.28910.26770.24440.21850.20730.19550.18280.16930.15450.14660.13820.12930.11970.1146
0.10920.10700.10480.10360.10250.1001
0.0977
0.0952
0.09140.09010.08460.08170.07880.07720.07570.07250.0691
0.0655
0.06180.05980.05780.05350.04880.04370.0378500
500×320
0.11390.86710.13140.25850.0140V
Ｑ
5.83805.05594.1281
3.69233.45383.19762.91902.61082.47682.33522.18442.0223
1.84611.75141.6512
1.54461.43001.36911.3054
1.27901.25211.23841.2246
1.1964
1.1676
1.13801.0922
1.07641.01110.97680.94130.92300.90440.86590.8256
0.78320.73840.71500.69070.63950.58380.52210.4522

0.66490.57580.47010.42050.39330.36420.33240.29730.28210.26590.24880.23030.21020.19940.18800.17590.16280.15590.14860.14560.14260.14100.13940.13620.13290.1296
0.12440.12260.11510.11120.10720.10510.10300.0986
0.09400.08920.08410.08140.07860.07280.06640.05940.0515550
550×355
0.13740.98790.13910.26850.0140V
Ｑ
6.06395.25154.28783.8351
3.58743.32133.03192.71182.57272.42552.26892.10061.91751.8191
1.71511.60431.48531.42211.35591.32851.30051.2863
1.27191.24271.21271.18201.1344
1.11811.05031.0146
0.97770.95870.93940.89940.85750.81350.76700.74260.71740.66420.60630.54230.46970.83310.72150.5891
0.52690.49290.45630.41650.3726
0.35340.33320.31170.2886
0.26340.24990.23560.22040.20400.19530.18630.18250.17860.17670.17470.17070.1666
0.16240.15580.15360.14430.13940.13430.13170.12900.12350.11780.11170.10530.10200.09850.09120.08330.07450.0645600
600×380
0.16431.08320.15170.28440.0140V
Ｑ
6.42485.56404.54304.06343.80093.51903.21242.87322.72582.56992.40392.22562.03171.9274
1.8172
1.69981.57371.50671.43661.40761.37791.36291.34761.31671.28491.25241.20191.1846
1.11281.07501.03591.01580.99530.95290.9086
0.86190.8126
0.78680.76010.70380.64240.57460.49761.05550.91410.74640.66760.62440.57810.52770.47200.44780.4222
0.39490.36560.33380.3166
0.29850.27920.25850.24750.23600.23120.22630.22390.22140.21630.21110.2057
0.19740.19460.18280.17660.17010.16680.16350.15650.14920.14160.13350.12920.12480.11560.10550.09440.0817

№3
呼び名
幅Ｂ×深さＨ(mm)2
通水断面積 Ａ（m )潤辺 Ｐ（m)
径深 Ｒ（m)2/3
Ｒ
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

0.31620.27390.22360.20000.18710.17320.15810.14140.13420.12650.11830.10950.10000.09490.08940.08370.07750.07420.07070.06930.06780.0671
0.06630.06480.0632
0.0616
0.05920.05830.05480.05290.05100.05000.04900.04690.04470.04240.04000.03870.03740.0346
0.03160.02830.0245650
650×415
0.19281.17120.16460.30030.0140V
Ｑ
6.78405.8751
4.79704.29064.01353.71583.39203.03392.87822.71362.53832.35002.14532.0352
1.91881.79491.66171.59101.51691.48631.45501.43911.42301.39031.35681.3224
1.26911.25091.17501.1351
1.09391.07261.05091.00620.95940.91010.85810.83080.80270.74310.67840.60670.52541.30791.13270.92480.82720.77380.71640.65390.58490.55490.5231
0.48930.45300.4136
0.39230.36990.34600.32030.30670.29240.28650.28050.27740.27430.26800.26150.25490.24460.24110.22650.21880.21090.20670.2026
0.19390.18490.17540.16540.16010.15470.14320.13070.11690.1012

ロングベンチフリューム

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
ここで，

V ： 流速 （m/sec)n ： 粗度係数0.013

R ： 径深 （m) = Ａ/ＰA ： 通水断面積 （m2)
P ： 潤辺 （m）
I ： 水路勾配 （‰) ※1‰（パーミル）＝0.1％
Ｑ ： 流量 （m3/sec)※8割水深(0.8H)で計算
1‰(=パーミル）

幅Ｂ

1mm

深さＨ
潤辺Ｐ
通水断面積Ａ

1000mm№1
呼び名
幅Ｂ×深さＨ（mm）
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（‰）
Ｉ
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

0.31620.27390.22360.20000.18710.17320.15810.14140.13420.12650.11830.10950.10000.09490.08940.08370.07750.07420.07070.06930.06780.0671
0.06630.06480.0632
0.0616
0.05920.05830.05480.05290.05100.05000.04900.04690.04470.04240.04000.03870.03740.0346
0.03160.02830.0245250
250×175
0.03180.4761
0.06680.16460.0130V
Ｑ
4.00473.46822.83172.53282.36922.19342.00231.79091.69901.60181.4984
1.3872
1.26641.2014
1.13271.05950.98090.93910.89540.87730.85890.84950.84000.82070.80090.78060.74920.73840.69360.67010.6457
0.63320.6204
0.59390.56630.53720.50650.49040.47380.43860.40040.35810.31020.12730.11020.09000.08050.07530.06970.0636
0.05690.05400.05090.04760.04410.04020.03820.03600.0336
0.03110.02980.02840.02780.02730.02700.02670.02600.02540.02480.02380.02340.02200.02130.02050.02010.01970.01880.01800.01700.01610.01550.01500.01390.01270.01130.0098300
300×200
0.0436
0.55450.07860.18350.0130V
Ｑ
4.46343.8654
3.15612.82292.64062.44472.23171.9961
1.8936
1.78531.67001.5461
1.4114
1.33901.26241.18091.0933
1.04670.99800.97780.95730.94680.93620.91470.89260.87000.83500.82300.77300.74680.71970.70570.6914
0.66200.63120.59880.56450.5466
0.5281
0.48890.44630.39920.34570.19460.16850.13760.12300.11510.10650.09730.08700.08250.07780.07280.06740.06150.05830.05500.05140.04760.0456
0.04350.0426
0.04170.04120.04080.03980.03890.03790.03640.03580.03370.03250.03130.03070.03010.02880.02750.02610.02460.02380.02300.02130.01940.01740.0150350
350×235
0.05930.64480.09200.20380.0130V
Ｑ
4.95734.29313.50533.13522.93282.71522.4786
2.21692.1032
1.98291.85481.7172
1.56761.4872
1.4021
1.3115
1.2142
1.1625
1.10841.08601.0632
1.05161.03981.01590.99140.96630.92740.91400.85860.82950.79930.78380.76790.73520.70100.66500.62700.60710.58650.54300.49570.44330.38390.29390.25450.20780.18590.17390.16100.14690.13140.12470.11750.10990.10180.09290.08810.08310.07770.07200.06890.06570.06430.06300.06230.06160.06020.05870.05730.05490.05420.05090.04910.04730.04640.04550.04350.04150.03940.03710.03600.03470.03210.02930.02620.0227400
400×260
0.07550.72990.10340.22030.0130V
Ｑ
5.35884.64083.7892
3.3892
3.17032.93512.67942.39652.27352.14352.00501.8563
1.6946
1.60761.51571.41781.31261.2567
1.1982
1.17401.14931.1367
1.12401.0982
1.07171.04461.00250.98810.92810.89670.86400.84730.83010.79480.75780.71890.67780.65630.63400.58700.53580.47930.41500.40450.35030.28600.25580.23930.22160.20220.18090.17160.16180.15130.14010.12790.12130.11440.10700.0991
0.09480.09040.08860.08670.08580.08480.08290.08090.07880.07560.07460.07000.06770.0652
0.06390.06260.06000.05720.05420.05110.04950.04780.04430.04040.03610.0313

№2
呼び名
幅Ｂ×深さＨ(mm)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（‰）
Ｉ
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

0.31620.27390.22360.20000.18710.17320.15810.14140.13420.12650.11830.10950.10000.09490.08940.08370.07750.07420.07070.06930.06780.0671
0.06630.06480.0632
0.0616
0.05920.05830.05480.05290.05100.05000.04900.04690.04470.04240.04000.03870.03740.0346
0.03160.02830.0245450
450×295
0.09690.83070.11660.23870.0130V
Ｑ
5.80575.02784.1052
3.67183.43473.17992.90282.59632.46312.32222.17222.0111
1.83591.74171.64211.53601.4221
1.3615
1.2981
1.27191.24511.23151.21781.18981.16111.13171.08611.07051.00550.97140.93610.91790.89940.86110.82100.77890.73430.71100.68690.63590.58050.51920.44970.56250.48710.39770.3557
0.33280.30810.28120.25150.23860.22500.21040.19480.17780.16870.15910.14880.13780.13190.12570.12320.12060.11930.11800.11520.11250.10960.10520.1037
0.09740.09410.09070.08890.08710.08340.07950.07540.0711
0.06880.0665
0.0616
0.05620.05030.0435500
500×3200.11680.90910.12850.25460.0130V
Ｑ
6.19425.36444.38003.9176
3.66453.3927
3.09712.77012.62802.47772.31762.14571.95881.8582
1.75201.63881.5172
1.45261.38501.35711.32851.31401.2993
1.26941.23881.2074
1.15881.1421
1.07281.03650.99880.97940.9596
0.91870.87600.83100.78350.75860.73290.67850.61940.55400.47980.72340.62650.51150.45750.42800.39620.36170.32350.30690.28930.27060.25060.22870.21700.20460.19140.17720.16960.16170.15850.15510.15340.15170.14820.14460.14100.13530.13330.12530.12100.1166
0.11430.11200.10730.10230.09700.09150.08860.08560.07920.07230.0647
0.0560550
550×355
0.1422
1.00600.14140.27140.0130V
Ｑ
6.6022
5.71764.66844.17563.90593.61613.30112.95252.80102.64082.47032.28702.08781.9806
1.86731.74671.6172
1.5483
1.4762
1.4464
1.41601.40051.38481.35301.3204
1.28701.23511.2173
1.1435
1.10471.06451.04391.02280.97920.93360.88570.83510.8086
0.78110.72320.66020.59050.51140.93880.81300.66380.59370.55540.5142
0.46940.41980.39830.37550.35120.32520.29680.28160.26550.24830.22990.22010.20990.20560.20130.19910.19690.19230.18770.18300.17560.17310.16260.15700.15130.14840.14540.13920.13270.12590.11870.11490.11100.10280.09380.08390.0727600
600×380
0.1666
1.09120.15270.28570.0130V
Ｑ
6.94946.01834.91394.39524.11133.80633.4747
3.10782.94832.77972.60022.4073
2.19762.08481.9655
1.83861.7022
1.62971.55391.52251.49041.47411.45771.4242
1.38981.35461.30011.28141.2036
1.16281.1205
1.09881.07661.03070.98270.93230.87900.85110.82220.7612
0.69490.62150.5383

1.15771.00260.81860.73220.68490.6341
0.57880.51770.4911
0.46300.43310.40100.36610.34730.32740.30630.28350.27150.25880.2536
0.24830.24550.24280.23720.23150.2256
0.21650.21340.20050.19370.18660.18300.17930.17170.16370.15530.14640.14170.13690.12680.11570.10350.0896

№3
呼び名
幅Ｂ×深さＨ(mm)2
通水断面積 Ａ（m )潤辺 Ｐ（m)
径深 Ｒ（m)2/3
Ｒ
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

0.31620.27390.22360.20000.18710.17320.15810.14140.13420.12650.11830.10950.10000.09490.08940.08370.07750.07420.07070.06930.06780.0671
0.06630.06480.0632
0.0616
0.05920.05830.05480.05290.05100.05000.04900.04690.04470.04240.04000.03870.03740.0346
0.03160.02830.0245650
650×415
0.19721.18530.16640.30250.0130V
Ｑ
7.3591
6.37315.20364.65434.35374.03073.6795
3.29103.12222.94362.75352.54922.32712.20772.0814
1.94701.80261.72581.64551.6123
1.57831.5611
1.54361.5081
1.47181.43451.37671.35691.27461.2314
1.1866
1.16351.14001.09151.04070.98730.93080.90130.87070.80610.73590.65820.57001.4512
1.25671.02610.91780.85850.79480.72550.64890.61560.58040.54290.50270.45890.43530.41040.38390.35540.34030.32440.31790.31120.30780.30430.29730.29020.28280.27140.26750.25130.24280.23390.22940.22480.21520.20520.19460.18350.17770.17170.15890.14510.12970.1124

ロングベンチフリューム

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
ここで，

V ： 流速 （m/sec)n ： 粗度係数0.014

R ： 径深 （m) = Ａ/ＰA ： 通水断面積 （m2)
P ： 潤辺 （m）
I ： 水路勾配 （‰) ※1‰（パーミル）＝0.1％
Ｑ ： 流量 （m3/sec)※8割水深(0.8H)で計算
1‰(=パーミル）

幅Ｂ

1mm

深さＨ
潤辺Ｐ
通水断面積Ａ

1000mm№1
呼び名
幅Ｂ×深さＨ（mm）
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（‰）
Ｉ
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

0.31620.27390.22360.20000.18710.17320.15810.14140.13420.12650.11830.10950.10000.09490.08940.08370.07750.07420.07070.06930.06780.0671
0.06630.06480.0632
0.0616
0.05920.05830.05480.05290.05100.05000.04900.04690.04470.04240.04000.03870.03740.0346
0.03160.02830.0245250
250×175
0.03180.4761
0.06680.16460.0140V
Ｑ
3.71863.22042.62952.35192.20002.03681.8593
1.66301.57771.4874
1.3914
1.2881
1.17591.1156
1.05180.98380.91080.87210.83150.81470.79750.78880.78000.76210.74370.72490.69570.68560.64400.62220.5996
0.58790.57600.55150.52590.49890.47030.45540.44000.40730.37180.3326
0.28800.11820.10240.08360.07470.06990.06470.0591
0.05280.05010.04720.04420.04090.03730.03540.03340.03120.02890.02770.02640.02590.02530.02500.02480.02420.02360.02300.0221
0.02180.02040.01970.01900.01860.01830.01750.01670.01580.01490.01440.01390.01290.01180.01050.0091

300
300×200
0.0436
0.55450.07860.18350.0140V
Ｑ
4.1446
3.58932.93072.62132.45202.27012.0723
1.85351.7584
1.65781.55071.43571.31061.2433
1.1722
1.09651.0152
0.97200.92670.90800.88890.87920.86930.84930.82890.80790.77530.76420.71780.69350.66830.65530.64200.6147
0.58610.55600.52420.50760.49040.45400.41440.37070.32100.18070.15640.12770.11420.10690.09890.09030.08080.07660.07220.0676
0.06250.0571
0.05420.05110.04780.04420.04230.04040.03950.03870.03830.03790.03700.03610.03520.03380.03330.03120.03020.02910.02850.02790.02680.02550.02420.02280.0221
0.02130.01970.01800.01610.0139350
350×235
0.05930.64480.09200.20380.0140V
Ｑ
4.60323.98653.25492.91132.72332.52122.30162.0586
1.95291.8412
1.72231.59461.45561.38091.30191.21791.12751.07951.02931.00850.9872
0.97640.9655
0.94330.9206
0.89730.86110.84870.79730.77020.74220.72780.71310.68270.65090.61750.5822
0.56370.54460.50420.46030.41170.35650.27290.23630.19300.17260.16140.14950.13640.12200.11580.10910.1021
0.09450.08630.08180.07720.0722
0.06680.06400.06100.05980.05850.05790.05720.05590.05450.05320.05100.05030.04720.04560.04400.0431
0.04220.04040.03850.0366
0.03450.03340.03220.02980.02720.02440.0211

400
400×260
0.07550.72990.10340.22030.0140V
Ｑ
4.97604.30933.5186
3.1471
2.94382.72552.48802.22532.11111.9904
1.86181.72371.57351.49281.4074
1.3165
1.2188
1.16691.11261.0902
1.0672
1.05551.04371.01970.99520.97000.93090.91750.86180.83260.80230.78670.77080.73800.70370.66760.62940.6094
0.58870.54510.49760.44500.38540.37560.32530.2656
0.2376
0.22220.20570.18780.16800.15930.15020.14050.13010.11870.11270.10620.09930.09200.08810.08400.08230.08050.07960.07870.07690.07510.07320.07020.06920.06500.06280.06050.05930.05810.0557
0.05310.05040.04750.04600.04440.04110.03750.03350.0290

№2
呼び名
幅Ｂ×深さＨ(mm)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（‰）
Ｉ
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

0.31620.27390.22360.20000.18710.17320.15810.14140.13420.12650.11830.10950.10000.09490.08940.08370.07750.07420.07070.06930.06780.0671
0.06630.06480.0632
0.0616
0.05920.05830.05480.05290.05100.05000.04900.04690.04470.04240.04000.03870.03740.0346
0.03160.02830.0245450
450×295
0.09690.83070.11660.23870.0140V
Ｑ
5.39104.66873.81203.4095
3.18932.95272.69552.41092.28722.15642.0171
1.86751.70471.6173
1.52481.42631.32051.26431.20541.18111.1562
1.14361.13081.10481.0782
1.05091.00850.99400.93370.90200.86920.85230.83510.7996
0.76240.72320.68190.6602
0.63780.59050.5391
0.48210.41750.52230.45230.36930.33030.30900.28610.26110.23360.22160.20890.19540.18090.16510.15670.14770.13820.12790.12250.11680.11440.11200.11080.10950.10700.10440.10180.0977
0.09630.09040.08740.08420.08250.08090.07740.07380.07000.06600.06390.06180.05720.05220.04670.0404500
500×3200.11680.90910.12850.25460.0140V
Ｑ
5.75184.9812
4.0671
3.63773.40283.15042.87592.57232.44032.30072.1521
1.9924
1.81881.72551.62681.52171.40891.34891.28611.26011.23361.22011.20651.17871.1503
1.1212
1.07601.06050.99620.96240.92740.90940.89100.85310.81340.77160.72750.70440.68050.63000.57510.51440.44550.67180.58180.47500.42480.39740.36790.33590.30040.28500.26870.25130.23270.21240.20150.19000.17770.16450.15750.15020.14710.14400.14250.14090.13760.13430.13090.12560.12380.11630.1124
0.10830.10620.10400.0996
0.09500.09010.08490.08220.07940.07350.06710.06000.0520550
550×355
0.1422
1.00600.14140.27140.0140V
Ｑ
6.13065.30924.33503.87733.62693.35783.06532.74162.60102.45222.29382.12371.9386
1.83911.73401.62201.50161.43771.37081.34311.31481.30051.28591.25641.2261
1.19501.14691.1304
1.06181.02580.98850.96930.94970.90930.86700.82250.77540.75080.72530.67150.61300.54830.47480.87170.75490.61640.55130.51570.47740.43580.38980.36980.34870.32610.30190.2756
0.26150.24650.2306
0.21350.20440.19490.19090.18690.18490.18280.17860.17430.16990.16300.16070.15090.14580.14050.13780.13500.12930.12320.11690.11020.10670.1031
0.09540.08710.07790.0675600
600×380
0.1666
1.09120.15270.28570.0140V
Ｑ
6.45305.58854.56294.0812
3.81763.53443.22652.88582.73772.58122.41452.23542.04061.93591.8251
1.70731.58061.51331.44291.41371.38401.36881.35361.32241.2906
1.25791.2072
1.18981.11771.07981.04051.02030.99970.9571
0.91250.86570.81620.79030.76350.70680.64530.57710.49981.07500.93100.76010.67990.63600.58880.53750.48070.45610.43000.40220.37240.33990.32250.30400.28440.26330.25210.24030.23550.23050.22800.22550.22030.21500.20950.2011
0.19820.18620.17980.17330.16990.16650.15940.15200.14420.13590.13160.12710.11770.1075
0.09610.0832

№3
呼び名
幅Ｂ×深さＨ(mm)2
通水断面積 Ａ（m )潤辺 Ｐ（m)
径深 Ｒ（m)2/3
Ｒ
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

0.31620.27390.22360.20000.18710.17320.15810.14140.13420.12650.11830.10950.10000.09490.08940.08370.07750.07420.07070.06930.06780.0671
0.06630.06480.0632
0.0616
0.05920.05830.05480.05290.05100.05000.04900.04690.04470.04240.04000.03870.03740.0346
0.03160.02830.0245650
650×415
0.19721.18530.16640.30250.0140V
Ｑ
6.83345.91794.83194.32184.04273.74283.41673.05602.89912.73332.55682.36712.16092.05001.93271.80791.67381.6025
1.52801.4971
1.46561.44951.43331.4004
1.3666
1.33201.27841.26001.1835
1.1434
1.10181.0804
1.05861.01350.96630.91680.86430.83690.80850.74850.68330.61120.5293

1.34751.16700.95280.8522
0.79720.73800.67370.6026
0.57170.53900.5042
0.46670.42610.40420.38110.35650.33000.31600.30130.29520.28900.28580.2826
0.27610.26940.26260.25210.24840.23330.22540.21720.21300.20870.19980.19050.18070.17040.16500.15940.14760.13470.12050.1043