| Title
|
Global distribution of physical water scarcity by major hydrological basin |
| Date
|
2010-10-28T15:26:00 |
| Date type
|
Publication: Date identifies when the resource was issued
|
| Presentation form
|
Digital map: Map represented in raster or vector form
|
| Abstract
|
This map provides a representation of levels of water scarcity by major hydrological basin, expressed in terms of the ratio
between irrigation water that is consumed by plants through evapotranspiration and renewable fresh water resources. Contrarily
to previous water scarcity maps, this map uses consumptive use of water rather than water withdrawal. Renewable fresh water
resources as well as net irrigation water requirements in the river basin are calculated through a water balance model,
with information regarding climate, soils and irrigated agriculture as input data.
The legend distinguishes three classes:
• Water scarcity in river basins where evapotranspiration due to irrigation is less than 10% of the total renewable water
resources is classified as low;
• Water scarcity in river basins where evapotranspiration due to irrigation is in between 10% and 20% of the total renewable
water resources is classified as moderate;
• Water scarcity in river basins where evapotranspiration due to irrigation is more than 20% of the total renewable water
resources is classified as high.
|
| Purpose
|
The map is part of the SOLAW (Status of Land and Water for Food and Agriculture) Managing Systems at Risk Report. |
| Status
|
Completed: Production of the data has been completed
|
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| Maintenance and update frequency
|
As needed: Data is updated as deemed necessary
|
| Descriptive keywords
|
World (place). |
| Descriptive keywords
|
SOLAW , Managing Systems at Risk , irrigation , water resources , hydrology , AQUAMAPS_analyses (theme). |
| Descriptive keywords
|
hydrology (discipline). |
| Access constraints
|
Copyright: Exclusive right to the publication, production, or sale of the rights to a
literary, dramatic, musical, or artistic work, or to the use of a commercial print or
label, granted by law for a specified period of time to an author, composer, artist,
distributor
|
| Spatial representation type
|
Vector: Vector data is used to represent geographic data
|
| Language
|
English |
| Character set
|
UTF8: 8-bit variable size UCS Transfer Format, based on ISO/IEC 10646
|
| Topic category code
|
Environment |
|
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| Supplemental Information
|
Values are expressed in x1000 instead of x100 to preserve decimals accuracy. |
