HYDRAULICS_1 Design of Irrigation Systems by László Ormos
Hydraulics Application of Continuity As flow is steady: A 1 v 2 A 2 where and
Hydraulics Flow rate r dr _ v v(r) R r D vmax
Bernoulli’s Law where the relative elevation of the water; the pressure head of the water; the water velocity head.
Water Flow in Pipes What is the water flow speed? Assuming that the water flow rate in a pipe having 200 mm diameter, is 100 m 3/hrs. 1. The water flow rate is converted from meter to centimeter units. 2. Cross section area of the pipe is the following: 3. The water flow speed is as follows:
Water Flow in Pipes What is the diameter of pipe if the water flow rate is 360 m 3/h and the water flow speed is 1 m/sec? 1. The water flow rate is converted from meter to cm unit: 2. The water flow speed is converted from meter to cm unit:
Water Flow in Pipes 3. The pipe cross section area is as follows: 4. The internal diameter of pipe is:
Water Flow in Pipes If the water flow velocity in a 200 mm diameter pipe is 88. 5 cm/sec, then 1. 2. 1. What is the water flow rate? What will be the flow velocity, if the diameter of pipe is reduced by half? The cross section area of the two pipes is
Water Flow in Pipes 2. The water flow rate is as follows: 3. The result changed to m 3/hr is:
Water Flow in Pipes 4. The water flow velocity in the 100 mm diameter pipe is as follows: or
Water Flow in Pipes A 200 mm pipe was installed from A to C, and a 50 mm pipe was hooked up in between (B). What is the water flow rate and velocity out of B if the water flow velocity between A to B is 1. 5 m/sec and from B to C is 0. 9 m/sec? A C D=200 mm v B D=50 mm
Water Flow in Pipes 1. The cross section area of the 200 mm pipe is 2. The cross section area of the 50 mm pipe is 3. The water flow rates between A to B and B to C are as follows: A to B: B to C:
Water Flow in Pipes 4. The water flow rate out of B is as follows: 5. The water flow velocity out of B is as follows:
References Azenkot, A. (1998): ”Design Irrigation System”. Ministry of Agriculture Extension Service (Irrigation Field service), MASHAV Israel Dr. Avidan, A. (1995): ”Soil-Water-Plant Relationship”. Ministry of Agriculture Extension Service (Irrigation Field service), CINADCO, Ministry of Foreign Affairs, MASHAV, Israel Sapir, E. -Dr. E. Yagev (1995): ”Drip Irrigation”. Ministry of Agriculture and Rural Development, CINADCO, Ministry of Foreign Affairs MASHAV, Israel Sapir, E. -Dr. E. Yagev (2001): ”Sprinkler Irrigation”. Ministry of culture and Rural Development, CINADCO, Ministry of Foreign Affairs, MASHAV, Israel Eng. Nathan, R. (2002): ”Fertilization Combined with Irrigation (Fertigation)”. Ministry of Agriculture and Rural Development, CINADCO, Ministry of Foreign Affairs, MASHAV, Israel
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