Graphics Library >> Biofuels Vital Graphics - Poweri ... >> Variation in blue water foot ...

Variation in blue water footprints for selected energy crops

Variation in blue water footprints for selected energy crops

File type Download Size Language
.jpg .jpg Download 319 kb -
.pdf .pdf Download 195 kb -
Uploaded 27 Feb 2012 by GRID-Arendal
Year: 2012 Author: Riccardo Pravettoni, UNEP/GRID-Arendal
Description:
Figure compares the water necessary to produce, transport, and convert a given crop into a fuel in two different regions. This shows important variations, and points to the need for careful matching of energy crops and production and conversion systems with available water supplies. The global trade in biofuel crops has created a ‘virtual water exchange’ where some countries with low water resources ‘export’ their water in the form of biofuels. It is important to consider not only the efficient use of water in the context of a single activity, but also the cumulative effects of several activities in one region on a watershed. Usually a distinction is made depending on the source of the water, for example whether production is entirely rainfed or irrigation is needed. An illustration of the water requirements of selected biofuel crops shows which biofuels demand the most water.
Downloads: 182     Rating: 4
  • Nitrogen runo
  • Global production of biofuels
  • Biofuels in China: crop production and water scarcity
  • Potential biofuels production on abandoned agricultural land
  • Energy costs in Bot Trang village, Cambodia
  • World biofuels production trends
  • Suitability by crop type in Uganda
  • Average water requirement for biofuels