prospects for agricultural water productivity, efficiency and saving in the nena region
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Prospects for Agricultural Water Productivity, Efficiency and Saving in the NENA Region, By Pasquale STEDUTO, Deputy FAO Regional Representative Near East & North Africa Office Cairo, Egypt, Land and Water Days in Near East & North Africa, 15-18 December 2013, Amman, JordanTRANSCRIPT
Prospects for Agricultural Water Productivity,Efficiency and Saving in the NENA Region
Amman, Jordan 15-18 December, 2013
Pasquale STEDUTODeputy FAO Regional Representative
Near East & North Africa OfficeCairo, Egypt
The contextThe context
Soaring of food pricesSoaring of food pricesPrices volatilityPrices volatility
Food crisisFood crisis
A. A. Food SecurityFood Security
(Lagi et al., 2011)
• Social unrestSocial unrest
• Wheat importWheat import
• DemographyDemography
B. B. Water ScarcityWater Scarcity
PhysicalPhysicalWater scarcityWater scarcity
Incipient physicalIncipient physicalWater scarcityWater scarcity
EconomicEconomicWater scarcityWater scarcity
Negligible or Negligible or NoNo
Water Water scarcityscarcity
No dataNo data
Simple rules of thumb:1 liter of water per 1 Kcal
1.5 m3 of water per 1 kg of wheat15m3 of water per 1 kg of beef meat
(consumed water)
C. C. Collateral DistressesCollateral Distresses• Increased degradation
of Natural Resources
• Progressive intensification of energy demand (+50% by 2050)
• Uncertain financial situations
• Increased competition
for Natural Resources
runoff ≈ year 2050(Milly et al., 2005)
• Increased climate variability and change
The challenge: + food; - The challenge: + food; - waterwater
• Augment the availability of water (+virtual)
• Reducing food losses and waste
• Increasing the efficiency and productivity of water use
30%
Water Productivity=
the beneficial output per unit of water used
Agricultural Water Agricultural Water ProductivityProductivity
beneficial output = physical, economical, social, environmental
water used = withdrawn/diverted, applied, consumed
typical units = Kg/m3, Kcal/m3, $/m3, …
some considerations:• Increasing water productivity is not necessarily synonymous of water
saving(increased WP may come with increased
consumption)• high water productivity does
not mean high yield (we may have high WP with
low yield)• non water-related practices and
factors are also very important to increase water productivity (pest and diseases
control, fertility management, seeds, market, institutions, etc.)
The necessary distinctions in water use
Consumptive use
Non-consumptive use
Beneficial (T)
Non-beneficial (ES/Tw)
Recoverable (D)(quality)
Non-recoverable
(Water Productivity)
(irrigation efficiency)
Dry-Land MaizeLoess Plateau -
China WP=1.64 kg/m3(convention
al
practices)WP=2.53 kg/m3(plastic-film
mulching)
Courtesy of prof. Shulan Zhang (Northwest A&F University)
(≈ + 60%)
Some experimental values of wheat WPin the NENA Region (kg of grain per m3)
Morocco 0.45-1.15
Iran 0.46-1.28
Algeria 0.46-0.53 (rainfed)0.70-1.80 (irrigated)
Tunisia ≈ 0.62 (long term average)
Lebanon 0.62-0.84
Jordan 0.45-0.86
Syria 0.63-0.91 (rainfed)0.80-1.12 (irrigated)
Turkey 0.40-1.13
Large variabilitywithinand
betweenCountries
World wheat WP assessment (base-line 2000-05; 1km pixel)
World wheat WP score normalized for climate(base-line 2000-05; 1km pixel)
Morocco (2010-11; 30m pixel)
Syria (2010-11; 30m pixel)
WheatWheat
From Sadras & Angus (2006)
Yield & WP gaps
Source of variability of WP
• Climatic environment - seasons - ET - CO2
• Crops/varieties - A/T - phenology - canopy - roots - resistances
• Management - soil health - fertility - pest/diseases/weeds - water soil moisture irrigation
Physical (Y, biomass, Kcal per mPhysical (Y, biomass, Kcal per m33))
Economic ($ per mEconomic ($ per m33))• Market - prices of produces - prices of input factors - risks
Proposal of a work plan
[inception phase]establish a platform of stakeholders in representation ofselected countries, key organizations, authorities, etc.
[framework-definition phase]Update the operational definition of water productivityand adopt a simple but practical framework as to howto assess water productivity in different agriculturalsystems
[identification phase]select relevant agricultural systems where to intervene(rainfed, irrigated, agro-pastoral, cropping systems, etc.)
[diagnostic phase]‘diagnosis’ of the selected systems/sub-systems in termsof ‘yield’ (physical –biomass/yield–, economical, etc.),‘yield gaps’, water use (‘consumptive’, non-consumptive’), as well as ‘management’, ‘infrastructural, ‘governance’(institutional and policy) and ‘non-management’components of the systems affecting water productivity(valuation)
A special focus would be given to policies for waterallocation, water demand management, water pricingand scaling up of modern technology + institutions
One additional focus can be on assessing field experience in managing watershed and their contribution (including investments) on soil moisture and recharging ground water
[intervention phase]‘design’ the interventions that would introduce ‘changes’ into the above mentioned ‘components’ with the objectiveof improving agricultural water productivity. A clear ‘business model’ and a consistent ‘water-accounting/auditing’framework should be applied to each type or set of interventions in order to have always clear the ‘gain’ forcorresponding ‘losses’ of water
[monitoring-WP phase]develop a robust ‘benchmarking’ & ‘monitoring’ system to: • quantify without ambiguity the raise of water productivity; • identify where the water saved (if any) goes; • evaluate the success of interventions,Indicators and time-bounded targets will be defined
Concluding Concluding RemarksRemarks
• There is enough scope and variability of WP in the NENA Region to expect significant potential gain in water saving and food production by focusing on its improvement (10-40%)
• The water scarcity situation in the NENA Region requires high-impact strategies in support of food and water securities
• Given the multiple interactions between factors influencing WP, a robust water accounting and monitoring system is key
• Achieving high-impact will require a critical mass of commitments, financial resources and an effective work plan on medium term
• Farmers are the ultimate managers of natural resources (soil/water). They need to be engaged from the on-set in any work-plan• Innovative governance promoting the inclusion of farmers, researchers, governmental authorities and private sector in improving WP has shown to be key for achieving results
Thank You
http://neareast.fao.org