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Brief Cross Basin Review

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Presented at the Pre-Forum BFP meeting, 7-8 November, 2008 in Addis Ababa, Ethiopia
35
Niger First 4 BFPs nearing completion
Transcript
Page 1: Brief  Cross Basin Review

Niger

First 4 BFPs nearing completion

Page 2: Brief  Cross Basin Review

Niger

6 remaining BFPs started in 2008

Page 3: Brief  Cross Basin Review

Broad review of basins

• Development context

– Overall situation

• Water availability / use

• Water productivity

• Intervention and impact analysis

– Intervention: what ‘they can do’

– Impact: what ‘you’ can do

• Knowledge management

– Not much to show at this stage

Page 4: Brief  Cross Basin Review

Background development

context

Page 5: Brief  Cross Basin Review

Agriculture vs GNI

-10,000

0

10,000

20,000

30,000

40,000

50,000

-10 0 10 20 30 40 50

Agricultural contribution to GDP (%)

Gro

ss N

ational In

com

e ($/c

apita)

• The poorest tend to rely on agriculture

Size of bubble

proportional to rural

population

World Bank, 2007

Page 6: Brief  Cross Basin Review

Essential to understand relative function of agricultureA

gri

cultur e

contr

ibution to g

row

th (%

)

World Bank, 2007

% Rural poor

% Contribution of agriculture to GDP

volta

Sao

Francisco

Karkheh Mekong

Page 7: Brief  Cross Basin Review

Water availability

Page 8: Brief  Cross Basin Review

Multiple water use reflects hydrology

Andean0.0

0.5

1.0

0.00 0.50 1.00 1.50 2.00

Rain / ETpot

ET / E

T pot

Capacity limit

Suppy limit

Ganges

Mekong

Sao Francisco

Volta

Yellow River

NileLimpopo

IndusKarkeh

Page 9: Brief  Cross Basin Review

Water use supports varied livelihoods

Andean0.0

0.5

1.0

0.00 0.50 1.00 1.50 2.00

Rain / ETpot

ET / E

T pot

Capacity limit

Suppy limit

Ganges

Mekong

Sao Francisco

Volta

Yellow River

NileLimpopo

IndusKarkeh

Fish

Livestock

Crops

Irrigation

M ekong

1,19 5 bcm

Ganges

1,167 bcm

K a r k h e h

2 1 , 4 0 2 mc m

Irrigation ET

Yellow

384 bcm

Rainfed cropsLimpopo

229 bcm

Grassland ET

Indus

865 bcm

Net runoff

Nile

2,042 bcm

S a o F r a n c i s c o

6 2 2 b c m

Page 10: Brief  Cross Basin Review

Hydrology matters to livelihoods

David Blake

Songkhram Wet Songkhram Dry

Page 11: Brief  Cross Basin Review

Nile

0

5000

10000

15000

20000

25000

30000

35000

40000

45000

1951 1956 1961 1966 1971 1976 1981 1986 1991 1996

Flow,

Calculated

Observed

0.00

0.05

0.10

0.15

0.20

0.25

0.30

0.35

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Evaporation or Rainfall (m) Rainfall

ETo

0.00

0.05

0.10

0.15

0.20

0.25

0.30

0.35

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Evaporation or Rainfall (m) Rainfall

ETo

0.00

0.05

0.10

0.15

0.20

0.25

0.30

0.35

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Evaporation or Rainfall (m) Rainfall

ETo

From Kirby et al., W-Use

Rainfed ag. by far the

biggest user

Page 12: Brief  Cross Basin Review

Devaraj de Condappa

Volta

Page 13: Brief  Cross Basin Review

Ganges

From Kirby et al., W-Use

accounts

But irrigation a major

user in Asia

Page 14: Brief  Cross Basin Review

Global Land cover classes – 2000 (UNEP)Grassland and rainfed dominate area

Page 15: Brief  Cross Basin Review

Irrigation (IWMI)But in Asia, irrigation drives up population density

Page 16: Brief  Cross Basin Review

Population density (persons per km2) – (CIESIN -2000)

Page 17: Brief  Cross Basin Review

Indus

200 150 100 50 0

population (millions)

0 50,000 100,000 150,000 200,000 250,000 300,000 350,000

Water use (mcm)

Basin water use and population

Woodland +

Grass

Irrigated

Rainfed

Yellow

200 150 100 50 0

population (millions)

0 20,000 40,000 60,000 80,000 100,000 120,000 140,000 160,000

Water use (mcm)

Mekong

50 45 40 35 30 25 20 15 10 5 0

population (millions)

0 100,000 200,000 300,000 400,000 500,000

Water use (mcm)

Ganges

400 350 300 250 200 150 100 50 0

population (millions)

0 100,000 200,000 300,000 400,000

Water use (mcm)

Woodland +

Grass

Irrigated

Rainfed

Woodland +

Grass

Irrigated

Rainfed

(Preliminary analysis)

Relative values better than absolutes

Woodland +

Grass

Irrigated

Rainfed

Page 18: Brief  Cross Basin Review

Limpopo

20 15 10 5 0

population (millions)

0 50,000 100,000 150,000

Water use (mcm)

Volta

20 15 10 5 0

population (millions)

0 50,000 100,000 150,000 200,000 250,000 300,000 350,000

Water use (mcm)

Sao Francisco

20 15 10 5 0

population (millions)

0 50,000 100,000 150,000 200,000 250,000 300,000

Water use (mcm)

Woodland +

Grass

Irrigated

Rainfed

Woodland +

Grass

Irrigated

Rainfed

Nile

200 150 100 50 0

population (millions)

0 200,000 400,000 600,000 800,000 1,000,000

Water use (mcm)

Page 19: Brief  Cross Basin Review

Water productivity

Page 20: Brief  Cross Basin Review

Basic concept: Need Water productivity to

respond faster than demand

crisis

response

WP

time

Demand

line

Page 21: Brief  Cross Basin Review

In some places, water productivity is responding to demand

Mac Kirby, 2007

0.000

0.200

0.400

0.600

0.800

1990 1995 2000 2005

Year

Wate

r pro

ductivity, kg/m

3R

ice

VN, Mekong Delta

Vietnam

VN Central

Highlands

Laos

CambodiaNE Thailand

Page 22: Brief  Cross Basin Review

Volta

Other basins, response low or patchy

Potential= 1-2 kg/m3

IRD, 2007

Page 23: Brief  Cross Basin Review

Volta

Actual Water-Productivity [the gain per m3 water

consumed] much lower than potential

Potential= 1-2 kg/m3

IRD, 2007

Page 24: Brief  Cross Basin Review

Other crops

• Sugar and maize

• Thailand high

• Generally increasing

0.00

1.00

2.00

3.00

4.00

5.00

6.00

1990 1995 2000 2005

Year

Maiz

e y

ield

, to

n/h

a

Laos

Thailand

Cambodia

Vietnam

Vietnam Centralhighlands

Vietnam MekongRiver Delta

0

20

40

60

80

1990 1995 2000 2005

Year

Sugarc

ane y

ield

, to

n/h

a Laos

Thailand

Cambodia

Vietnam

Vietnam Central

highlands

Vietnam Mekong

River Delta

Page 25: Brief  Cross Basin Review

Full range of WPr may include

• Irrigated crops

• Rainfed

• Livestock

• Fisheries

– Capture

– Aquaculture

…most systems highly mixed

Page 26: Brief  Cross Basin Review

Water agriculture and

poverty

Measurable livelihood impacts

Page 27: Brief  Cross Basin Review

Water availability seems less influential than

gain per volume used (water productivity)

GNI vs Water

-10,000

0

10,000

20,000

30,000

40,000

50,000

-500 0 500 1000 1500 2000 2500

Water availability (m3/cap)

GN

I ($

/cap P

PP

)

Size of bubble proportional to agriculture contribution to GDP

Per capita income vs.

water availability

World Bank, 2007

Page 28: Brief  Cross Basin Review

São Francisco: Drought is one poverty factor…of many

Marcello Torres

et al., 2008

Drought

Poor

education

Access to

credit

Page 29: Brief  Cross Basin Review

Karkheh, Iran: Farmers not the poorest

politics controls

0.00

0.05

0.10

0.15

0.20

0.25

0.30

0.35

0.40

Une

mploy

ed

Man

ager

Clerk

Trad

eper

son

Farm

er

Prod

uctio

n wor

ker

Uns

kille

d wor

ker

KB

Cou

ntry

Poverty lines from household

income and expenditure data

Karkheh BFP team

Page 30: Brief  Cross Basin Review

Syngenta Science Day 2009

.. Mekong What people do can affect (shared) assets

Complex but understandable

Dam developmentChanging land use, shifting cultivation,sustainability, sedimentation

Seasonal water shortage, poor soils, low rice productivity

Fish & environmental impacts of upstream Salinisation, water

quality, highly developed

Eric Kemp-Benedict, 2008

Page 31: Brief  Cross Basin Review

Interventions

Page 32: Brief  Cross Basin Review

Global -to local

GLOBALwater and food systems considered separately

both impact on livelihoods

Local ScaleLocal systems considered individually

Local impact not referenced to broader systems

Basin scaleSystems interact through

(Unspecified) transfers

Page 33: Brief  Cross Basin Review

Niger

Opportunities or pressures vary from basin to basin

Markets

Population growth

Climate change

Need for ecosystem

services

Remember development

trajectory

Page 34: Brief  Cross Basin Review

Impact pathway and

Knowledge management

• All impact pathways done

– All honest efforts

• Pathway depends on basin scale,

organization, existing network makers,

etc..

• Getting better engagement with CPWF

– Some more work needed with Topics

Page 35: Brief  Cross Basin Review

Agenda


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