A water-productivity framework for understanding and action.

Book Title: NA
Year Published: 2003
Month Published: NA
Author: Molden, D. ; Murray-Rust, H. ; Sakthivadivel, R. ; Makin, I.
Book Group Author: NA

Substantially increasing the productivity of water used in agriculture is essential to meet goals of food and environmental security. Achieving these increases requires research that spans scales of analysis and disciplines. In spite of its importance, we do not have a common conceptual framework and language to facilitate research and communication among stakeholders. A common conceptual framework for water productivity is proposed. In a broad sense, productivity of water is related to the value or benefit derived from the use of water. Definitions of water productivity differ based on the background of the researcher or stakeholder. For example, obtaining more kilograms per unit of transpiration is an important means of expressing productivity of water when the interest of analysis is crops. At the basin scale, obtaining more value from water used from irrigated and rainfed crops, forests, fisheries, ecosystems and other uses is of importance. There are several interrelated definitions of water productivity that are important across scales and domains of analyses. A set of definitions for water productivity is proposed and their relationship across scales is shown. As the analysis moves from individual plants to fields, farms, irrigation systems and water basins, different processes and means of analysis are important. Understanding how measures of water productivity scale up and scale down provides the key to how a group of people of diverse disciplines can work together on this topic. For example, crop scientists and breeders may focus on obtaining more mass per unit of transpiration, while planners and economists may consider policies to allocate water and land resources between different uses. To capture the full benefits of improved water productivity at farm level, it is necessary to integrate these with system- and basin-level changes. We provide a framework to show the interrelationship of the work of various disciplines.

Pages: NA
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Volume: NA
Number: NA
Journal: NA
Journal ISO: NA
Organization: NA
Publisher: NA
ISSN: 0851996698

demand, evapotranspiration, food security, irrigation,irrigation systems, plant water relations, productivity, sustainability,transpiration, water allocation, water availability, water management,water policy, water supply, water use, water use efficiency, wateryield, watersheds, catchment areas, water resource management, watersupplies, watering, Natural Resource Economics (EE115) (New March 2000),Policy and Planning (EE120), Supply, Demand and Prices (EE130), PlantWater Relations (FF062), Soil Water Management (Irrigation and Drainage)(JJ800) (Revised June 2002) [formerly Soil Water Management], WaterResources (PP200)

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