2012 aif, d2s5 ppt appropriate water management objectives for irrigation in asia by dr. chris j....

8/2/2019 2012 AIF, D2S5 PPT Appropriate Water Management Objectives for Irrigation in Asia by Dr. Chris J. Perry

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Appropriate Water ManagementObjectives for Irrigation in Asia

Chris PerryADB Manila

April 2012

8/2/2019 2012 AIF, D2S5 PPT Appropriate Water Management Objectives for Irrigation in Asia by Dr. Chris J. Perry

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Context...

Scarcity of water

Competition amongsectors

8/2/2019 2012 AIF, D2S5 PPT Appropriate Water Management Objectives for Irrigation in Asia by Dr. Chris J. Perry

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Context...

Scarcity of water

Competition amongsectors

So we need terminology that “works” across sectors

8/2/2019 2012 AIF, D2S5 PPT Appropriate Water Management Objectives for Irrigation in Asia by Dr. Chris J. Perry

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Beware of value-laden terms...

“Efficiency”

“Improvement”

“Upgraded”

“Water saving”

These terms mean different 

things in different sectors

8/2/2019 2012 AIF, D2S5 PPT Appropriate Water Management Objectives for Irrigation in Asia by Dr. Chris J. Perry

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Neutral terminology for all sectors...

•Water applied for any purpose goes to...

Consumed fraction

• Beneficial consumption• Non-beneficial consumption

Non-consumed fraction

• Recoverable

• Non-recoverable

» These terms mean the samethings in all sectors! 

8/2/2019 2012 AIF, D2S5 PPT Appropriate Water Management Objectives for Irrigation in Asia by Dr. Chris J. Perry

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Worry about...

Consumed fraction

• Beneficial consumption

• Non-beneficial consumption

Non-consumed fraction

• Recoverable

• Non-recoverable

8/2/2019 2012 AIF, D2S5 PPT Appropriate Water Management Objectives for Irrigation in Asia by Dr. Chris J. Perry

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And note that...

Healthier forests

Upgraded catchments

Water harvesting Improved irrigation

Stopping leaks

 ALL TEND TO INCREASE 

CONSUMPTIVE USE 

and/or 

REDUCE RETURN FLOWS

8/2/2019 2012 AIF, D2S5 PPT Appropriate Water Management Objectives for Irrigation in Asia by Dr. Chris J. Perry

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What does “consumption

accounting” mean for irrigationstrategy?

8/2/2019 2012 AIF, D2S5 PPT Appropriate Water Management Objectives for Irrigation in Asia by Dr. Chris J. Perry

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• Productivity of Land and Water

ET、Yield and water productivity

8/2/2019 2012 AIF, D2S5 PPT Appropriate Water Management Objectives for Irrigation in Asia by Dr. Chris J. Perry

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ET, Yield and water productivity100.0 200.0 300.0 400.0 500.0 600.0 700.0

0

1,000

2,000

3,000

4,000

5,000

6,000

7,000

8,000

9,000

10,000

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

Yield/ha and per M3

Y/ha

Y/m3

Evapotranspiration (mm)

   Y   i  e   l   d   /   h  a   (   k  g   )

   Y   i  e   l   d   /  m   3   (   k  g   )

Productivity of Land and Water

8/2/2019 2012 AIF, D2S5 PPT Appropriate Water Management Objectives for Irrigation in Asia by Dr. Chris J. Perry

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ET, Yield and water productivity100.0 200.0 300.0 400.0 500.0 600.0 700.00

1,000

2,000

3,000

4,000

5,000

6,000

7,000

8,000

9,000

10,000

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

Yield/ha and per M3

Y/ha

Y/m3

Evapotranspiration (mm)

   Y   i  e   l   d   /   h  a   (   k  g   )

   Y   i  e   l   d   /  m   3   (   k  g   )

Productivity of Land and Water

Short of land

8/2/2019 2012 AIF, D2S5 PPT Appropriate Water Management Objectives for Irrigation in Asia by Dr. Chris J. Perry

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ET, Yield and water productivity100.0 200.0 300.0 400.0 500.0 600.0 700.0

0

1,000

2,000

3,000

4,000

5,000

6,000

7,000

8,000

9,000

10,000

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

Yield/ha and per M3

Y/ha

Y/m3

Evapotranspiration (mm)

   Y   i  e   l   d   /   h  a   (   k  g   )

   Y   i  e   l   d   /  m   3   (   k  g   )

Productivity of Land and Water

Short of WATER

8/2/2019 2012 AIF, D2S5 PPT Appropriate Water Management Objectives for Irrigation in Asia by Dr. Chris J. Perry

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How do we reach the “water short”

target area in irrigated agriculture?

Ration water per farmer

That way each knows it is

scarce and will avoid waste

H d h h h

8/2/2019 2012 AIF, D2S5 PPT Appropriate Water Management Objectives for Irrigation in Asia by Dr. Chris J. Perry

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How do we reach the “water short”

target area in irrigated agriculture?

Ration water per farmer

TELL the farmer what theservice will be

This allows the farmer to

make plans

H d h h h

8/2/2019 2012 AIF, D2S5 PPT Appropriate Water Management Objectives for Irrigation in Asia by Dr. Chris J. Perry

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How do we reach the “water short”

target area in irrigated agriculture?

Ration water per farmer

TELL the farmer what the

service will be

Base that information on a realistic

assessment of:

Likely water available

Infrastructure sophistication andcondition

Staffing

Farmer discipline

H d h h “ h ”

8/2/2019 2012 AIF, D2S5 PPT Appropriate Water Management Objectives for Irrigation in Asia by Dr. Chris J. Perry

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How do we reach the “water short”

target area in irrigated agriculture?

• The more farmers know about the

service, the better they will use it

• The better it is used, the

more “crop per drop”

• And the better the dialogue

between agency and farmer toimprove service

8/2/2019 2012 AIF, D2S5 PPT Appropriate Water Management Objectives for Irrigation in Asia by Dr. Chris J. Perry

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To sum up...

• Talk about water in cross-

sectoral terminology

• Evaluate irrigation

strategy in that same

terminology – it will affect

objectives

• Tell the farmers all you can!!

8/2/2019 2012 AIF, D2S5 PPT Appropriate Water Management Objectives for Irrigation in Asia by Dr. Chris J. Perry

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Thank you for your attention...

8/2/2019 2012 AIF, D2S5 PPT Appropriate Water Management Objectives for Irrigation in Asia by Dr. Chris J. Perry

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8/2/2019 2012 AIF, D2S5 PPT Appropriate Water Management Objectives for Irrigation in Asia by Dr. Chris J. Perry

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