water management and food security - iisd › pdf › 2012 › nascap_andreini_day1.pdf · water...
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Water Management and Food Security by
Marc Andreini
Water-Energy-Food Security New Challenges and New Solutions for
Water Management, May 1-4,2012, Winnipeg
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Global Gross Crop Water Demand
source: Wada et al. 2012
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Source Robert Bailey, 2011
Land used for Agriculture
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IWMI, 2000
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4
43
74
6
12
87
14
06
24
86
32
55
47
29 61
50
0
1,000
2,000
3,000
4,000
5,000
6,000
7,000
Ke
nya
Eth
iop
ia
So
uth
Afr
ica
Th
aila
nd
La
os
Ch
ina
Bra
zil
Au
str
alia
No
rth
Am
erica
PER CAPITA STORAGE CAPACITY m3/capita
World Bank (2003)
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Africa experiences extreme spatial and
temporal rainfall variability
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Impact of rainfall variability on GDP and
Agricultural GDP growth
-80
-60
-40
-20
0
20
40
60
801
98
2
19
83
19
84
19
85
19
86
19
87
19
88
19
89
19
90
19
91
19
92
19
93
19
94
19
95
19
96
19
97
19
98
19
99
20
00
year
%
-30
-25
-20
-15
-10
-5
0
5
10
15
20
25
rainfall variability
GDP growth
Ag GDP growth
Source: World Bank 2006 (Ethiopia Water Country Assistance Strategy
in Ethiopia
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We might increase
production by:
Bringing more dry land
into production
Improving rainfed yields
Building more irrigation
infrastructure
Improving irrigated
yields
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Framework to diagnose and identify options to improve water productivity in farmers’ fields
0
45
90
135
180
225
270
0 10 20 30 40 50
Seasonal water supply (in)
Gra
in y
ield
(b
u a
c-1
)
1) Higher yields with better
crop mgt, same water supply
2) Less water, same yield with
improved irrigation mgt
3) Higher yields with
less irrigation water
Mean WP function
slope = 8 bu ac-in-1
WP boundary
slope =11 bu ac-in-1
By Kenneth Cassman and Patricio Grassini
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Improve on-farm water management
Improve crops
Improve hydro-met data and information
Improve policies especially with regard to
ecosystem services and sustainability
Adopt Integrated Water Resource Management
(IWRM) as a way of doing business
Make sure food is accessible and nutritional
outcomes result in good health
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We should make choices that
assure that high yields will be
maintained, even in the face of
major shocks, and that our
agricultural practices will have
acceptable environmental
impacts.
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Established in April, 2010 with a $50 million gift from the
Robert B. Daugherty Charitable Foundation
Vision: The Water for Food Institute is a research, education, and policy
institute committed to helping the world efficiently use its limited
freshwater resources, with particular focus on ensuring the food supply
for current and future generations.