Wangana Piped Irrigation Network Project Dr. Srinivasa Lingireddy Dipl.-Eng Alexander Allik Mr. Milind Murudkar.

Wangana Piped Irrigation Network Project

Dr. Srinivasa LingireddyDipl.-Eng Alexander Allik

Mr. Milind Murudkar

Land Irrigated by Wangana Project

Pipe Distribution Network

From Pump Station

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

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

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

Will the piped irrigation be more costlier ?

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

Are there any problems with piped irrigation systems ?

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

Cost Savings through efficient design and use of sophisticated

pressure and flow control equipment

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

Cost Savings

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

Water drainsby gravity whenthere is no control

Entrained Air

Water drainsby gravity whenthere is no control

Pump trip – water stops

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

Cost Savings

PFCMD shuts down when the pressure goes down

No air entrainment !

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

Cost Savings

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

Cost Savings

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

Pressure Flow Control Metering Device (PFCMD)

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

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

Nodes with pressures between 9 and 12 m

(all other nodes have pressures greater than 12m)

Pressure Heads for DM-5

Pressure Heads for DM-4

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

Sidoma Systeme GmbH