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An Assessment of Regional Water Endowments, Crop Water Productivity, and Implications for Intra-country Virtual Water Trade in Iran

English title An Assessment of Regional Water Endowments, Crop Water Productivity, and Implications for Intra-country Virtual Water Trade in Iran
Applicant Yang Hong
Number 113890
Funding scheme Project funding (Div. I-III)
Research institution Abteilung Systemanalyse, Integrated Assessment und Modellierung EAWAG Dübendorf
Institution of higher education Swiss Federal Institute of Aquatic Science and Technology - EAWAG
Main discipline Other disciplines of Environmental Sciences
Start/End 01.10.2006 - 30.09.2009
Approved amount 141'941.00
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All Disciplines (2)

Discipline
Other disciplines of Environmental Sciences
Economics

Keywords (7)

Hydrology; virtual water; socio-economic factors; optimization; water resources; crop water productivity; regional virtual water trade

Lay Summary (English)

Lead
Lay summary
The overall goal of this project is to provide a systematic assessment of the feasibility of applying the virtual water concept to improve water productivity in individual provinces and for the whole country in Iran, taking into account various natural, socio-economic and resources constraints. Specific objectives relating to the overall goal include:

1) To assess the water resources availability and reliability in different regions/provinces taking into consideration the fluctuation within a year and between years.

2) To estimate the water requirement of different crops in different regions/provinces with improved spatial resolution.

3) To estimate crop water productivities with respect to quantity and value of product on irrigated and rain-fed land concerning consumptive water use and water supply in different regions/provinces.

4) To assess the water use intensity in different regions/provinces based on the water resources availability and water demand in the industrial, domestic and agricultural sectors at present and in the next 10-20 years.

5) To provide scenarios for improving regional/provincial and national water productivity through regional crop structural adjustment and inter-provincial food trade, taking into account natural, socio-economic and resources constraints at different levels and other regional and national objectives.

Water resources endowment in Iran is generally poor and the spatial distribution is uneven. Some regions are enduring severe water stress.Producing more food with increasing water scarcity is a daunting challenge to the country. In this project, water resources availability and crop water requirement across provinces/regions in Iran will be estimated to lay the basis for the assessment. Water productivity across regions will be evaluated with respect to physical yield and value of products and different expressions of water input. Scenarios for improving water productivity through regional crop structural adjustment and virtual water trade are proposed for individual regions and then aggregated to the whole country, taking into consideration constraints concerning natural and socio-economic conditions and other regional and national objectives.

The SWAT model (Soil and Water Assessment Tool) will be used for the assessment of water resources availability and crop water requirement in different provinces/regions. The SWAT model is currently used in several other projects at Eawag. The regional socio-economic data and farmers’water use behavior will be sought from both secondary data and field surveys and interviews. Scenarios for regional crop structural adjustment and virtual water trade will be proposed based on optimizing water productivity subject to various constraints.
Direct link to Lay Summary Last update: 21.02.2013

Responsible applicant and co-applicants

Employees

Name Institute

Associated projects

Number Title Start Funding scheme
122479 Global agricultural green and blue water consumptive uses and virtual water flows in the context of water scarcity and climate change 01.02.2009 Interdisciplinary projects
155047 Outsourcing water pollution within China 01.06.2014 International short research visits

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