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(1)

19 th April, EGU 2016 Vienna

Session CL0.01/EOS8

Media Interdisciplinary Approaches in Climatic Change Research and Assessment

Peter Burek

Yusuke Satoh, Yoshihide Wada, Martina Flörke, Stefanie Eisner, Naota Hanasaki, Sylvia Tramberend, Günther Fischer, Taher Kahil and David Wiberg, William Cosgrove

Looking at the spatial and temporal distribution of

global water availability and

demand

(2)

Half our planet’s population are water insecure…

Motivation

Africa, 14%

Asia, 26%

Oceania, 6%

Europe, 14%

North/Central America, 16%

South America, 24%

Africa, 14%

Asia, 26%

Oceania, 6%

Europe, 15%

North/Central America 16%

South America, 23%

Africa, 5%

Asia, 66%

North/Central America, 14%

Europe, 10%

Oceania, 1%

South America, 4%

Africa, 8%

North/Central America, 15%

Europe, 12%

Oceania, 1%

South America, 5%

Water supply 53900 km 3 /year

Water supply 53300 km 3 /year

Water demand 4600 km 3 /year

Water demand 5800 km 3 /year

2010

2050

North Central America, 16%

Africa, 14%

Asia, 26%

Oceania, 6%

Europe, 14%

North/Central America, 16%

South America, 24%

Africa, 14%

Asia, 26%

Oceania, 6%

Europe, 15%

North/Central America 16%

South America, 23%

Africa, 5%

Asia, 66%

North/Central America, 14%

Europe, 10%

Oceania, 1%

South America, 4%

Africa, 8%

Asia, 86%

North/Central America, 15%

Europe, 12%

Oceania, 1%

South America, 5%

Water supply 53900 km 3 /year

Water supply 53300 km 3 /year

Water demand 4600 km 3 /year

Water demand 5800 km 3 /year

2010

Humanity 2050 .

Lem, S. (1986) One Human Minute

writer of science fiction, philosophy

(3)

IIASA’s

Water Future and Solution Initiative Research Question:

What water-related policies & practices can be implemented now

that will be robust at improving

human well-being through water security

across a wide range of possible futures?

(4)

Water Future scenarios

② Climate change scenario:

① Socio-Economic change scenario:

Representative Concentration Pathways (RCPs) Shared Socioeconomic Pathways (SSPs)

RCPs

RCP8.5 RCP6.0 RCP4.5 RCP2.6 SSPs

Multi-Models

Feasible

combinations

(5)

Water Future scenarios

② Climate change scenario:

① Socio-Economic change scenario:

Representative Concentration Pathways (RCPs) Shared Socioeconomic Pathways (SSPs)

RCPs

RCP8.5 RCP6.0 RCP4.5 RCP2.6

Assumptions on water use

SSPs

Multi-Models

Feasible combinations

Approach

Storyline

SSP1 - Sustainability:

This is a world making relatively good progress towards sustainability, with sustained efforts to achieve

development goals, while reducing resource intensity

and fossil fuel dependency …

(6)

Water Futures: Scenarios

(7)

Models Institution

WaterGAP Kassel University (Germany), Frankfurt University (Germany) H08 National Institute for Environmental Studies (NIES, Japan) PCR-GLOBWB Utrecht University (The Netherlands)

Wada Y, Floerke M, Hanasaki N, Eisner S, Fischer G, Tramberend S, Satoh Y, van Vliet M, Yillia P, Ringler C, Burek P. and Wiberg D (2015), Geoscientific Model Development

Multi-model Assessment: Water Demand

Approach

(8)

Models Institution

WaterGAP Kassel University (Germany), Frankfurt University (Germany) H08 National Institute for Environmental Studies (NIES, Japan) PCR-GLOBWB Utrecht University (The Netherlands)

Wada Y, Floerke M, Hanasaki N, Eisner S, Fischer G, Tramberend S, Satoh Y, van Vliet M, Yillia P, Ringler C, Burek P. and Wiberg D (2015), Geoscientific Model Development

Multi-model Assessment: Water Demand

Multi-model

Domestic water demand

(9)

Results

WFaS fast track analysis

(10)

Population Growth Continues

• 33% more people by 2050 compared to 2010 globally (6.8 billion to 9.1 billion)

• 24% more people by 2050 in Asia 4.1 billion to 5.1 billion

Middle of the Road scenario

(11)

Available water resource per capita

(12)

Available water resource per capita

(13)

Seasonal water resources

0 20 40 60 80 100

0 20 40 60 80 100

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

Dependency ratio [%]

Accumulated runoff [km3/month]

Ethiopia

Internal External Dependency ratio

0 10 20 30 40 50 60 70 80 90 100

0 2 4 6 8 10 12

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

Dependency ratio [%]

Accumulated runoff [km3/month]

Syria

Internal External Dependency ratio

0 10 20 30 40 50 60 70 80 90 100

0 20 40 60 80 100 120

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

Dependency ratio [%]

Accumulated runoff [km3/month]

Egypt

Internal External Dependency ratio 0

20 40 60 80 100

0 20 40 60 80 100

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

Dependency ratio [%]

Accumulated runoff [km3/month]

Ethiopia

Internal External Dependency ratio

0 10 20 30 40 50 60 70 80 90 100

0 2 4 6 8 10 12

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

Dependency ratio [%]

Accumulated runoff [km3/month]

Syria

Internal External Dependency ratio

0 10 20 30 40 50 60 70 80 90 100

0 20 40 60 80 100 120

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

Dependency ratio [%]

Accumulated runoff [km3/month]

Egypt

Internal External Dependency ratio

0 20 40 60 80 100

0 20 40 60 80 100

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

Dependency ratio [%]

Accumulated runoff [km3/month]

Ethiopia

Internal External Dependency ratio

0 10 20 30 40 50 60 70 80 90 100

0 2 4 6 8 10 12

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

Dependency ratio [%]

Accumulated runoff [km3/month]

Syria

Internal External Dependency ratio

0 10 20 30 40 50 60 70 80 90 100

0 20 40 60 80 100 120

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

Dependency ratio [%]

Accumulated runoff [km3/month]

Egypt

Internal External Dependency ratio

Dependency from upstream countries:

Ethiopia: 4%

Syria: 73%

Egypt: 94%

(14)

Water Demand – Middle of the Road

Figure: Global water demand, by sector (km

3

/yr).

Note: The figure shows the estimated future total water demand (km

3

/yr) by sector for Middle of the Road scenario and the sector-wise distribution of water demand in 2010 and 2050. In SSP2 in 2050, total global water demand increases by 27%

above 2010. During this period the share of agriculture in total water demand drops from 73% to 59%.

(Note: In this projection the irrigation system efficiency is kept at base year level.)

0 1000 2000 3000 4000 5000 6000

2010 2020 2030 2040 2050

Industry Domestic Agriculture

2010

2050

73%

9%

18%

Agriculture Domestic Industry

2010

59%

17%

24%

Agriculture Domestic Industry

2050

(15)

Water Demand – Global Middle of the Road

The share of the agricultural sector in total water demand

decreases from 73% to 59%

(16)

Increasing Demands, Increasing Challenges

Domestic water withdrawals more than double till 2050

Industrial water withdrawals 60% more

Agricultural water withdrawals increase by 25%

Water Demand – Global Middle of the Road

(17)

Potential population exposed to

severe water scarcity

(18)

Potential population exposed to

severe water scarcity

(19)

Thank you

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