Wangana Piped Irrigation Network Project

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Wangana Piped Irrigation Network Project
Dr. Srinivasa Lingireddy Dipl.-Eng Alexander
Allik Mr. Milind Murudkar
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Land Irrigated by Wangana Project
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Pipe Distribution Network
From Pump Station
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Steering India into 21st Century

• Piped irrigation is very common in developed
  world
• Probably the only way water is supplied for
  irrigation in most developed countries
• Piped irrigation is long overdue in India
• Wangana would be a role-model

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Steering India into 21st Century

• Traditional canal irrigation is highly
  inefficient
• At most 50 efficiency
• OK when water has little or no value
• NOT acceptable when we add value to water by
  lifting it up several 10s of meters

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Steering India into 21st Century

• Piped Irrigation
• Almost 100 efficiency
• Highly suitable for hilly terrains
• High residual pressures at several outlets
• Direct connection to sprinkler or drip irrigation
• Easy to measure water usage
• NO loss of precious irrigable land
• Fewer cross drainage works
• No water logging and consequent reduction in
  agricultural yield

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Will the piped irrigation be more costlier ?
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Will the piped irrigation be more costlier ?

• Not necessarily, when we look at the overall
  efficiency and benefits
• Value added water
• Life of the project
• Cross drainage works
• Maintenance costs
• Savings in irrigable land
• There may not be much difference in cost per
  hectare as more efficient use of water will help
  irrigate more land

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Are there any problems with piped irrigation
systems ?
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Are there any problems with piped irrigation
systems ?

• There are advantages and disadvantages to any
  system
• Calls for more competent design engineers and
  contractors
• Unsophisticated cheap designs may end up in more
  maintenance problems
• Poor quality construction may lead to leakage,
  pipe breaks and failure of the entire project

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Cost Savings through efficient design and use of
sophisticated pressure and flow control equipment
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Cost Savings

• Most pipeline failures are due to improper
  management of air in distribution networks
• Air in pipes is a big problem
• Proper management is essential

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Cost Savings

• Large quantities of air enters and get trapped
  only if the pipes are allowed to drain

Entrained Air
Pump trip water stops
Water drains by gravity when there is no control
Water drains by gravity when there is no control
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Cost Savings

• Large quantities of air CHOKES the pipes and
  reduce their carrying capacity.
• This requires over sizing of pipes and increased
  costs.

Entrapped Air can Choke the pipe and reduce its
capacity
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Cost Savings

• PFCMD (Pressure Flow Control Metering Device)
  prevents draining of pipes

No air entrainment !
PFCMD shuts down when the pressure goes down
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Cost Savings

• Small quantities of entrained air will be removed
  through air valves

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Cost Savings

• Little or no air in the pipes allow for most
  economical sizing of pipes

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Pressure Flow Control Metering Device (PFCMD)
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Pressure Flow Control Metering Device (PFCMD)

• Maintains 10 L/s irrespective of pressure at each
  outlet
• Will measure consumption
• Shuts down when the pressure drops below the set
  value
• Virtually maintenance free
• Operates solely based on available pressure
• No need for external power or electricity
• No need for control systems like SCADA

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Modern Design Tools

• Pipe2000 Hydraulic Modeling Software
• Allows for optimal diameter selection based on
  limits on velocities and pressures
• Computes total cost of the project based on the
  unit cost of pipes
• PFCMD can be included in the model

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Nodes with pressures between 9 and 12 m (all
other nodes have pressures greater than 12m)
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Pressure Heads for DM-5
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Pressure Heads for DM-4
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Summary

• Use of modern technology and good engineering
  helped us minimize the overall cost of the
  project while providing a state-of-the-art
  solution and maintenance free design

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Sidoma Systeme GmbH