In selected siphon tube diameter and quantities, generally flow control

When the channel or channels with channel intersects with the road, and the two drains or water channels at the same level  Instrument valve manifolds almost the height of the aqueduct inconvenient to use, you can set the siphon tube. Inverted siphon arrangement, its axis shall be the intersection of the river, ditch, road perpendicular to narrow the length of the building; their embedment depth, the tube should be below the top  2 way manifold  riverbed scouring lines of at least 0.5m, or below the channel bottom, roads road 1.0m. In selected siphon tube diameter and number, generally at a flow rate control. Flow rate is too large, head loss increases, channels available head relative decrease; taking into account through a small flow, the flow rate is too small will not occur due to siltation.