ADIL UMAR 2008-ag-1896. Irrigation: Life blood of agriculture Agriculture is the main player of...
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ADIL UMAR2008-ag-1896
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Irrigation: Life blood of agricultureIrrigation: Life blood of agriculture
Agriculture is the main player of the economy of Pakistan with 21% contribution to GDP and more than 45% contribution in labour force Pakistan’s agriculture rely heavily on irrigation.
Pakistan has the world’s largest contiguous irrigation system Pakistan ranks 4th in the world as for as irrigated area ( About 7%) is concerned. About 36 MA( About 75% of the cultivated area) in Pakistan is irrigated land. Pakistan has invested heavily in the irrigation sector. Allocated about $ 8 billion in this sector upto the year 2011-12
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1-Rainfall
Annual rainfall (125mm in South-East to 750mm North-West)Total water generated by rainfall is around 32 BCM Contribution to crops is 10-20%
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2-Groundwater
Exploitation of Groundwater is 59 BCMOver 9,00,000 private tubewells 40% of total supply at farm-gate
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3-Surface Water Resources
Total Inflow is 171 BCMTarbela (10.38 BCM - 485 ft),Mangla (5.90 BCM - 380 ft) 48 Canals (61000 km), 19 Barrages1,70,000 Watercourses (1.6 Million km)
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04/21/23 Potential for Water Wars 7
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Indus Water Treaty 1960 –Between India & Pakistan
04/21/23 Potential for Water Wars 9
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SIGNING OF INDUS WATER TREATY ON 19 SEPT. 1960
10
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Indus Water Treaty 1960Plan India PakistanInitial Indian 29 MAF/Year 90 MAF/Year
Initial Pakistani 15.5 102.5
Revised Indian All water from the E. Rivers & 7% of W. Rivers
Some water from E. rivers & 93% W. rivers
Revised Pakistani
30% E. rivers & nothing from W. rivers
70% E. rivers and all of W. rivers
World Bank Proposal
Entire flow from eastern rivers
All flow from the western rivers
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DEVELOPMENTS AFTER INDUS WATER TREATY
04/21/23 Potential for Water Wars 13
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TARBELA DAM –THE INDUS
(10.38 BCM - 485 ft)
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MANGLA DAM -JEHLUM(5.90 BCM - 380 ft)
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Reservoir
Commisioning
year
Live storage capacity (MAF)
Initial
Year 2004
Year 2020
Mangla
1967
5.3
4.58
4.0
Tarbela
1975
9.3
7.11
6.6
Chashma
1971
0.7
0.40
0.1
Total
15.7
12.09
10.7
Anticipated Storage loss of Reservoirs Source: (Tarar, 1995)
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Works proposed to the Pakistan
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BAGLIHAR DAM ON CHENAB IN JAMMU
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•Water is becoming scarce with each passing day. Per capita availability of fresh water in Pakistan has decreased by about 800% since 1950.
•Efficient and judicious use of the irrigation water is the only sustainable option left with us.
•Surface water is still the largest source of irrigation in Pakistan (31% as a single source)
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Existing Situation
• Irrigation system is over burdened and loosing its efficiency due to increasing gap in actual and required O&M expenditures (Actual O&M expenses made only about 20-30% of required expenses)
• Govt. has to subsidize major portion of the O&M expenditures (about 70% according to an estimate)
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04/21/23 Potential for Water Wars 21
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ONGOING DEVELOPMENTSPower, Politics & Population Pressures have
tempted the country to come up with dozens of power and irrigation projects
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“Power Projects” on Chenab in India
Scheme MW Scheme MW
Gypsa 225 Dulhasti 780
Kirthai 400 Baglihar 900
Naunut 400 Sawal Kot 1200
Bursar 275 Salal 690
Parwal Dul 375
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Global 1950 – 16,800 cubic meters per annum 2000 – 6,800 cubic meters per annum Reduction: 60 % in 50 years
Pakistan 1950 – 5,300 cubic meters per annum 2000 – 1,200 cubic meters per annum !!!! Reduction: 77 % in 50 years
Critical limit 1,000 cubic meters per person per annum
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Year Population Water availability (Million) per capita (m3)
1951 34 53001961 46 39501971 65 27001981 84 21001991 115 16002000 148 12002010 168 10662020 196 9152025 209 850
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Rising Water Demand But Stagnant Water Availability
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Irrigated Area 36 million acres(14.56 million hectares)
Length of Canals 56,073km
Length of Water Courses 1.6 million km
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LocationLocationDelivery at Head Delivery at Head
(MAF)(MAF)
LossLoss
% age% age MAFMAF
Main and Branch CanalsMain and Branch Canals 106106 1515 1616
Disty. And MinorsDisty. And Minors 9090 88 77
WatercoursesWatercourses 8383 3030 2525
FieldsFields 5858 3030 1717
Crop UseCrop Use 4141
TotalTotal 6262 6565
The additional irrigation water requirement at farm gate has been estimated at 12.61 MAF, which is 31.93 MAF at canal head (PWSS 2002). Which we can save even if we save water at water course level
30%
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A : Problems from management perspectiveoOverall water scarcity, low water availability during winter and at the
beginning and end of summer with limited reservoir capacity.
oPhysical and technical limitations of the system.
oLow efficiency in delivery and use.
oInequitable water distribution.
oInadequate operation and maintenance of the system
oExcess seepage and wastage in the system.
oInsufficient cost recovery ( O&M expenditures are more than recovery of Aabiana).
oAdministrative and financial constraints.
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Supply driven rather than demand led distribution of water without consideration of cropping pattern
Inequity of irrigation water both inter and intra provincial level and watercourse level
Deferred operation and maintenance of centuries old irrigation system
System losses as high as 55% Slow and lackluster approach for watercourse
improvement and lining Lack of water conservation and application
techniques at the farm level
Issues
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TechnicalTechnical
• Land leveling to apply water more uniformly • Efficient sprinklers to apply water more uniformly• Furrow and bed cultivation to save water• Drip irrigation to conserve water
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ManagerialManagerial
• Better irrigation scheduling• Improving canal operations for timely deliveries• Applying water when most crucial to a crops yield• Water-conserving tillage and field operation
methods• Better maintenance of canal, watercourses and
equipment• Recycling drainage water
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InstitutionalInstitutional
• Establishing water users organizations for better
management of water • Fostering rural infrastructure for private sector
dissemination of efficient technologies• Better training and extension efforts
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AgronomicAgronomic
• Selecting crop varieties with high yields per cubic meter of transpired water
• Inter-cropping to maximize use of soil moisture• Better matching crops to climate conditions and the
quality of water available• Crop rotations to maximize output under condition of
soil and water salinity• Selecting drought-tolerant crops where water is
scarce or unreliable• Breeding water-efficient crop varieties
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Crash Programme for cleaning of watercourses, minors and distributaries.Remodeling of moghas for uniform distribution of water.Crop independent Abiana on gross farm area.Minimize element of rent seeking by irrigation personnel.Investment in surface supplies to improve remaining watercourses. Management” put on hold for want of funding.Consensus on new dams sites is imperative to ensure water suppliesIncrease cropping intensity within Riverine area by better water management at system level.
Strategies
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