渗水管通过流量：
(1)
式中 Q-渗水管通过流量，米3/秒； v-管内流速，米/秒； ω-管断面积，米2； C-谢才系数，见附录Ⅲ； R-水力半径，米； i-渗管坡度。 Q、v亦可由表1查算。表1 圆形尖水管水力计算表| D=125 | D=150 | D=200 | D=250 | D=300 | SK | S | K | S | K | S | K | S | K | 0.100.200.300.400.500.600.700.800.901.003.0154.6265.8546.8077.5518.1008.4628.6098.4938.351 | 1.928.0418.1331.0946.3362.4077.6490.6898.8099.66 | 3.4065.2276.6147.6918.5329.1559.5639.7339.6028.532 | 3.1313.0829.4850.5875.38101.6126.3147.6160.8150.8 | 4.136.348.029.3210.3511.1011.6011.8011.6410.35 | 3.728.263.6109.0168.6218.9272.5318.2346.6325.2 | 4.87.369.3210.8312.0112.9513.4613.7013.5113.01 | 12.251.2115.4197.9294.8399.1454.0577.2628.7589.5 | 5.428.3210.5312.2413.5814.5615.2215.4815.2813.58 | 19.983.3187.8322.1479.9646.1804.4939.21024.0959.9 |
| D=350 | D=400 | D=450 | D=500 | D=550 | SK | S | K | S | K | S | K | S | K | 0.10.20.30.40.50.60.70.80.91.06.019.2211.6713.5715.0516.1516.7817.1616.9315.05 | 30.1125.7283.3486.0723.9975.41213.51417.11544.01417.9 | 6.5710.0912.7714.8416.4617.6618.4418.7718.5216.46 | 43.0179.6404.2694.2103413931733202522062069 | 7.1110.9113.8116.0517.8218.9819.9620.3120.0417.82 | 58.9245.8554.2950.2141718942373277230222833 | 7.6311.7114.8217.2319.0220.5121.4221.8021.5119.12 | 78.0325.7734.21250187725293144367340033754 | 8.1412.4815.7918.3620.3421.8622.8323.2422.9220.37 | 100.6420.0946.61624242032594055473951624840 |
