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8/2/2019 2012 AIF, D1S2 PPT Evolution of Irrigation Practices - Are Large Scale Irrigation Systems Still Relevant by Aditi Mukherji
http://slidepdf.com/reader/full/2012-aif-d1s2-ppt-evolution-of-irrigation-practices-are-large-scale-irrigation 1/25
Evolution of irrigation practices: Are largescale irrigation systems still relevant?
Aditi Mukherji
Senior ResearcherIWMI
8/2/2019 2012 AIF, D1S2 PPT Evolution of Irrigation Practices - Are Large Scale Irrigation Systems Still Relevant by Aditi Mukherji
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Evidence and arguments : Evolution of
irrigation
• From 1950s to 1990s, nature and form of irrigation haschanged from public canals to private groundwater
• Since 2000s, run away growth in groundwater hasslowed down
• What then are the implications of recent trends for largescale public irrigation systems?
8/2/2019 2012 AIF, D1S2 PPT Evolution of Irrigation Practices - Are Large Scale Irrigation Systems Still Relevant by Aditi Mukherji
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Phases of irrigation in India
• Phase 1 ( till end 1960s): Public investments andlarge scale irrigation systems drove expansion inirrigated area
• Phase 2 (early 1970s to end 1990s): Privateinvestment in groundwater took over
• Phase 3 (since early 2000s): Slowdown in growth
in groundwater irrigation
8/2/2019 2012 AIF, D1S2 PPT Evolution of Irrigation Practices - Are Large Scale Irrigation Systems Still Relevant by Aditi Mukherji
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Irrigated area in India by source: 1950to 2010
0
5000
10000
15000
20000
25000
30000
35000
40000
45000
I r r i g a t e d
a r e a
i n
1 0 0 0
h a
Canal irrigated area Tank irrigated area Groundwater irrigated area
Since 1970s,groundwaterirrigated area hasincreased, as hasnumber of wells
and tubewells….
8/2/2019 2012 AIF, D1S2 PPT Evolution of Irrigation Practices - Are Large Scale Irrigation Systems Still Relevant by Aditi Mukherji
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8/2/2019 2012 AIF, D1S2 PPT Evolution of Irrigation Practices - Are Large Scale Irrigation Systems Still Relevant by Aditi Mukherji
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8/2/2019 2012 AIF, D1S2 PPT Evolution of Irrigation Practices - Are Large Scale Irrigation Systems Still Relevant by Aditi Mukherji
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8/2/2019 2012 AIF, D1S2 PPT Evolution of Irrigation Practices - Are Large Scale Irrigation Systems Still Relevant by Aditi Mukherji
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8/2/2019 2012 AIF, D1S2 PPT Evolution of Irrigation Practices - Are Large Scale Irrigation Systems Still Relevant by Aditi Mukherji
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Why did groundwater irrigationovertake canal irrigation in 1970s?
• Green Revolution
– Canals were designed for 75% cropping intensity, not 200%
• Population growth and dwindling land sizes
– Farmers needed to grow multiple crops on same land
• Post colonial state’s revenue interest from irrigationdeclined
– As a result maintenance got routinely neglected
• New technologies and energy subsidies made pumpscheaper
– As a result farmers invested heavily in groundwater extraction
Groundwater providesreliability and flexibility –
something that farmersdemanded, but canals werenever designed to provide
8/2/2019 2012 AIF, D1S2 PPT Evolution of Irrigation Practices - Are Large Scale Irrigation Systems Still Relevant by Aditi Mukherji
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But the groundwater juggernaut ofIndia is slowing down
8/2/2019 2012 AIF, D1S2 PPT Evolution of Irrigation Practices - Are Large Scale Irrigation Systems Still Relevant by Aditi Mukherji
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5.5 million newpumps were
added between1987 to 1993
8/2/2019 2012 AIF, D1S2 PPT Evolution of Irrigation Practices - Are Large Scale Irrigation Systems Still Relevant by Aditi Mukherji
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Almost 7.0 millionnew pumps wereadded between1994 to 2000
8/2/2019 2012 AIF, D1S2 PPT Evolution of Irrigation Practices - Are Large Scale Irrigation Systems Still Relevant by Aditi Mukherji
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But only 1.2 millionpumps came upbetween 2001 to2007 and in somestates like West
Bengal, Bihar and
Jharkhand, absolutenumber of pumps
declined
8/2/2019 2012 AIF, D1S2 PPT Evolution of Irrigation Practices - Are Large Scale Irrigation Systems Still Relevant by Aditi Mukherji
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Why is it slowing down? The east vs.the rest
• There is simply not enoughgroundwater
• This explains slow down
northern, western and southernIndia
• But not in eastern India where
groundwater availability is high
absolute size of groundwatereconomy has contracted
8/2/2019 2012 AIF, D1S2 PPT Evolution of Irrigation Practices - Are Large Scale Irrigation Systems Still Relevant by Aditi Mukherji
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The energy irrigation nexus and theparadox of the East
• Low rates of pump electrification
• High diesel prices
• Low crop prices
• No public procurement system
• Poor roads and marketing
8/2/2019 2012 AIF, D1S2 PPT Evolution of Irrigation Practices - Are Large Scale Irrigation Systems Still Relevant by Aditi Mukherji
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Therefore slow down in groundwatergrowth is a result of both resource and
policy constraint.
And this calls for suitably nuanced
responses
8/2/2019 2012 AIF, D1S2 PPT Evolution of Irrigation Practices - Are Large Scale Irrigation Systems Still Relevant by Aditi Mukherji
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8/2/2019 2012 AIF, D1S2 PPT Evolution of Irrigation Practices - Are Large Scale Irrigation Systems Still Relevant by Aditi Mukherji
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Revitalize Surface Irrigation: Deploy Surface Storage to
Minimize Power Subsidies and Carbon Footprint of Irrigation:
Deep groundwater areasare where large canal
systems operate
75-80 b kWh of power valued atUS $ 9.0 billion/year mostly in
deep groundwater pumping.
Surface storages can reducepower and carbon footprint:
8/2/2019 2012 AIF, D1S2 PPT Evolution of Irrigation Practices - Are Large Scale Irrigation Systems Still Relevant by Aditi Mukherji
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Revitalize Irrigation Bureaucracy:Incentives, Accountability, Performance Mgt, Culture Change.
• Restructure governancesystems
• Unbundle irrigation agencies
• Benchmark performance
• Create incentives (better pay)
and accountability.
• Realistic ISF and 100%collection
8/2/2019 2012 AIF, D1S2 PPT Evolution of Irrigation Practices - Are Large Scale Irrigation Systems Still Relevant by Aditi Mukherji
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Encourage Distributed Storage:Morph canal systems into Melon-on-vine systems
• To improve system flexibilityand reliability
• Rajasthan: farm-storages
• Gujarat, Tamilnadu, Andhra
Pradesh: village tanksreplenished by canal water
8/2/2019 2012 AIF, D1S2 PPT Evolution of Irrigation Practices - Are Large Scale Irrigation Systems Still Relevant by Aditi Mukherji
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Invest in electricity and markets inareas of high groundwater potential
8/2/2019 2012 AIF, D1S2 PPT Evolution of Irrigation Practices - Are Large Scale Irrigation Systems Still Relevant by Aditi Mukherji
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• High groundwater potential, high rainfall and naturalrecharge
• Farmer already pay high electricity tariffs andtherefore do not expect “free electricity”
• Food production in eastern India will ease pressure
on over-exploited aquifers and also promote growthin this poverty stricken region
Slide 22
Invest in electricity and markets in areas ofhigh groundwater potential
8/2/2019 2012 AIF, D1S2 PPT Evolution of Irrigation Practices - Are Large Scale Irrigation Systems Still Relevant by Aditi Mukherji
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Thank you
For questions and comments, write toAditi Mukherji
8/2/2019 2012 AIF, D1S2 PPT Evolution of Irrigation Practices - Are Large Scale Irrigation Systems Still Relevant by Aditi Mukherji
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Abundant groundwater and high naturalrecharge
Water tables
recover aftermonsoonrains
F hi h iff d l i i
8/2/2019 2012 AIF, D1S2 PPT Evolution of Irrigation Practices - Are Large Scale Irrigation Systems Still Relevant by Aditi Mukherji
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Farmers pay high tariffs and electricitysubsidy is not an issue
0 20 40 60 80 100
Madhya Pradesh
Haryana
Gujarat
Andhra Pradesh
Karnataka
Rajasthan (Transco)
Tamil Nadu
Punjab
Maharashtra
U.P (Power corp)
West Bengal
Bihar
Percentage
Electricitysubsidy is
negligible ineastern India